{"query":{"parameter":"ph change ph","place":"US-NV","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-NV","US"],"parameter_keys":["name:ph change"],"names_matched":[["ph change ph","name:ph change"]],"match":"exact","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":60,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"32227be9fe1521ad","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Goose Creek (NAC 445A.1336): The limits of this table apply to the body of water known as Goose Creek within the State of Nevada. Goose Creek is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1336","page":119,"quote":null}},{"id":"13daa25ab0288348","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Salmon Falls Creek (NAC 445A.1338): The limits of this table apply to the body of water known as Salmon Falls Creek from the confluence of the North and South Forks of Salmon Falls Creek to the Nevada-Idaho state line. Salmon Falls Creek is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1338","page":120,"quote":null}},{"id":"40f46e8930b64df5","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Shoshone Creek (NAC 445A.1342): The limits of this table apply to the body of water known as Shoshone Creek from the Nevada-Idaho state line to its confluence with Salmon Falls Creek. Shoshone Creek is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1342","page":122,"quote":null}},{"id":"4b00439ceae9e981","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Jarbidge River, East Fork (NAC 445A.1344): The limits of this table apply to the body of water known as the East Fork of Jarbidge River from its origin to the Nevada-Idaho state line. The East Fork of Jarbidge River is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1344","page":124,"quote":null}},{"id":"032cc8b73714f0d9","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Jarbidge River, above Jarbidge (NAC 445A.1346): The limits of this table apply to the body of water known as Jarbidge River from its origin to the bridge above the town of Jarbidge. This segment of the Jarbidge River is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1346","page":125,"quote":null}},{"id":"2f30826879602a1f","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Jarbidge River, below Jarbidge (NAC 445A.1348): The limits of this table apply to the body of water known as the Jarbidge River from the bridge above the town of Jarbidge to the Nevada-Idaho state line. This segment of the Jarbidge River is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1348","page":127,"quote":null}},{"id":"853c22039eedd1fa","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Bruneau River (NAC 445A.1352): The limits of this table apply to the body of water known as the Bruneau River from its origin to the Nevada- Idaho state line. The Bruneau River is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1352","page":128,"quote":null}},{"id":"fbd56802427c0f33","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Owyhee River, above Mill Creek (NAC 445A.1354): The limits of this table apply to the body of water known as the Owyhee River from Wild Horse Reservoir to its confluence with Mill Creek. This segment of the Owyhee River is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1354","page":130,"quote":null}},{"id":"6b30010605122bb3","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Owyhee River, below Mill Creek (NAC 445A.1356): The limits of this table apply to the body of water known as the Owyhee River from its confluence with Mill Creek to the exterior border of the Duck Valley Indian Reservation. This segment of the Owyhee River is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1356","page":131,"quote":null}},{"id":"3e9b3ea666a63a84","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Owyhee River, South Fork (NAC 445A.1362): The limits of this table apply to the body of water known as the South Fork of the Owyhee River from its origin to the Nevada-Idaho state line. The South Fork of the Owyhee River is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1362","page":133,"quote":null}},{"id":"08cce1e11601acb4","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Humboldt River near Osino (NAC 445A.1436): The limits of this table apply to the body of water known as the Humboldt River from the upstream source of the main stem to Osino. This segment of the Humboldt River is located in Elko County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1436","page":173,"quote":null}},{"id":"3164927269de3e9a","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Humboldt River at Palisade (NAC 445A.1438): The limits of this table apply to the body of water known as the Humboldt River from Osino to the Palisade Gage. This segment of the Humboldt River is located in Elko and Eureka Counties; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1438","page":174,"quote":null}},{"id":"48939614269a4731","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Humboldt River at Battle Mountain (NAC 445A.1442): The limits of this table apply to the body of water known as the Humboldt River from the Palisade Gage to the Battle Mountain Gage. This segment of the Humboldt River is located in Eureka and Lander Counties; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1442","page":176,"quote":null}},{"id":"784421f419fc341c","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Humboldt River at State Highway 789 (NAC 445A.1444): The limits of this table apply to the body of water known as the Humboldt River from the Battle Mountain Gage to where State Highway 789 crosses the Humboldt River. This segment of the Humboldt River is located in Humboldt and Lander Counties; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1444","page":178,"quote":null}},{"id":"7e5184317b559c01","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Humboldt River at Imlay (NAC 445A.1446): The limits of this table apply to the body of water known as the Humboldt River from where State Highway 789 crosses the Humboldt River to Imlay. This segment of the Humboldt River is located in Humboldt and Pershing Counties; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1446","page":179,"quote":null}},{"id":"6e2a14cebf90d167","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Humboldt River at Woolsey (NAC 445A.1448): The limits of this table apply to the body of water known as the Humboldt River from Imlay to Woolsey. This segment of the Humboldt River is located in Pershing County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1448","page":181,"quote":null}},{"id":"7de385ab59a53271","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Truckee River at the state line (NAC 445A.1682): The limits of this table apply to the body of water known as the Truckee River at the California-Nevada state line. This segment of the Truckee River is located in Washoe County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1682","page":300,"quote":null}},{"id":"037f7138993b9e10","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Truckee River at Idlewild (NAC 445A.1684): The limits of this table apply to the body of water known as the Truckee River from the California- Nevada state line to Idlewild. This segment of the Truckee River is located in Washoe County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1684","page":302,"quote":null}},{"id":"8d5b75579cb607d9","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Truckee River at East McCarran (NAC 445A.1686): The limits of this table apply to the body of water known as the Truckee River from Idlewild to the East McCarran Boulevard Bridge. This segment of the Truckee River is located in Washoe County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1686","page":304,"quote":null}},{"id":"484bfa8c5673779b","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Truckee River at Lockwood Bridge (NAC 445A.1688): The limits of this table apply to the body of water known as the Truckee River from the East McCarran Boulevard Bridge to the Lockwood Bridge. This segment of the Truckee River is located in Storey and Washoe Counties; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1688","page":306,"quote":null}},{"id":"5db8fdb39f2aaf21","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Truckee River at Derby Dam (NAC 445A.1692): The limits of this table apply to the body of water known as the Truckee River from the Lockwood Bridge to Derby Dam. This segment of the Truckee River is located in Storey and Washoe Counties; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1692","page":308,"quote":null}},{"id":"b02fc70ecea70a6b","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Truckee River at the Pyramid Lake Paiute Reservation (NAC 445A.1694): The limits of this table apply to the body of water known as the Truckee River from Derby Dam to the exterior border of the Pyramid Lake Paiute Reservation. This segment of the Truckee River is located in Storey and Washoe Counties; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1694","page":310,"quote":null}},{"id":"c5a231f98dadffa4","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Carson River, West Fork at the state line (NAC 445A.1796): The limits of this table apply to the body of water known as the West Fork of the Carson River at the California-Nevada state line. This segment of the West Fork of the Carson River is located in Douglas County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1796","page":344,"quote":null}},{"id":"af2fa8bf7bbd359e","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Bryant Creek near the state line (NAC 445A.1798): The limits of this table apply to the body of water known as Bryant Creek from the California-Nevada state line to its confluence with the East Fork of the Carson River. This segment of Bryant Creek is located in Douglas County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1798","page":346,"quote":null}},{"id":"c3d44eaa33b2e971","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Carson River, East Fork at the state line (NAC 445A.1802): The limits of this table apply to the body of water known as the East Fork of the Carson River at the California-Nevada state line. This segment of the East Fork of the Carson River is located in Douglas County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1802","page":348,"quote":null}},{"id":"a33d0efefd10aed4","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Carson River, East Fork at U.S. Highway 395 south of Gardnerville (NAC 445A.1804): The limits of this table apply to the body of water known as the East Fork of the Carson River from the California-Nevada state line to the Riverview Mobile Home Park at U.S. Highway 395 south of Gardnerville, except for the length of the river within the exterior borders of the Washoe Indian Reservation. This segment of the East Fork of the Carson River is located in Douglas County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1804","page":350,"quote":null}},{"id":"dcd5750f6afe795e","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Carson River, East Fork at Muller Lane (NAC 445A.1806): The limits of this table apply to the body of water known as the East Fork of the Carson River from the Riverview Mobile Home Park at U.S. Highway 395 to Muller Lane, except for the length of the river within the exterior borders of the Washoe Indian Reservation. This segment of the East Fork of the Carson River is located in Douglas County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1806","page":352,"quote":null}},{"id":"160d1100851b668a","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Carson River at Genoa Lane (NAC 445A.1808): The limits of this table apply to the bodies of water known as the Carson River, including the East Fork of the Carson River from Muller Lane to the West Fork, the West Fork of the Carson River from the California-Nevada state line to the East Fork, and the main stem of the Carson River from the confluence of the East and West Forks to Genoa Lane. These segments of the Carson River are located in Douglas County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1808","page":354,"quote":null}},{"id":"d18d480803cc0c92","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Carson River at Cradlebaugh Bridge (NAC 445A.1812): The limits of this table apply to the body of water known as the Carson River from Genoa Lane to U.S. Highway 395 at Cradlebaugh Bridge, except for the length of the river within the exterior borders of the Washoe Indian Reservation. This segment of the Carson River is located in Douglas County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1812","page":356,"quote":null}},{"id":"7dcdfd1bd9e73a2f","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Carson River at the Mexican Ditch Gage (NAC 445A.1814): The limits of this table apply to the body of water known as the Carson River from U.S. Highway 395 at Cradlebaugh Bridge to the Mexican Ditch Gage. This segment of the Carson River is located in Carson City and Douglas County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1814","page":358,"quote":null}},{"id":"a6435e048c022622","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Carson River near New Empire (NAC 445A.1816): The limits of this table apply to the body of water known as the Carson River from the Mexican Ditch Gage to New Empire. This segment of the Carson River is located in Carson City; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1816","page":360,"quote":null}},{"id":"923a3865df913e39","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Carson River at Dayton Bridge (NAC 445A.1818): The limits of this table apply to the body of water known as the Carson River from New Empire to the Dayton Bridge. This segment of the Carson River is located in Carson City and Lyon County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1818","page":361,"quote":null}},{"id":"ed043ae2198b2c07","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Carson River at Lahontan Reservoir (NAC 445A.1822): The limits of this table apply to the body of water known as the Carson River from the Dayton Bridge to Lahontan Reservoir. This segment of the Carson River is located in Lyon County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1822","page":363,"quote":null}},{"id":"59a381f1be5bad43","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Lahontan Reservoir (NAC 445A.1824): The limits of this table apply to the entire body of water known as Lahontan Reservoir. Lahontan Reservoir is located in Churchill and Lyon Counties; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1824","page":365,"quote":null}},{"id":"188a8f3bd31ee808","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Walker River, West Fork at the state line (NAC 445A.1886): The limits of this table apply to the body of water known as the West Fork of the Walker River at the California-Nevada state line. This segment of the West Fork of the Walker River is located in Douglas County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1886","page":389,"quote":null}},{"id":"fcb4387a80de3d4a","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Topaz Lake (NAC 445A.1888): The limits of this table apply to the body of water known as Topaz Lake at various points in Topaz Lake. Topaz Lake is located in Douglas County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1888","page":391,"quote":null}},{"id":"26bf7fa765ed0fb3","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Walker River, West Fork near Wellington (NAC 445A.1892): The limits of this table apply to the body of water known as the West Fork of the Walker River from the California-Nevada state line to near Wellington. This segment of the West Fork of the Walker River is located in Douglas and Lyon Counties; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1892","page":393,"quote":null}},{"id":"e0aa1a99edf1daba","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Walker River, West Fork at the East Fork of the Walker River (NAC 445A.1894): The limits of this table apply to the body of water known as the West Fork of the Walker River near Wellington to its confluence with the East Fork of the Walker River near Nordyke Road. This segment of the West Fork of the Walker River is located in Lyon County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1894","page":395,"quote":null}},{"id":"0a221392172f10d9","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Sweetwater Creek (NAC 445A.1896): The limits of this table apply to the body of water known as Sweetwater Creek from the California- Nevada state line to its confluence with the East Fork of the Walker River. Sweetwater Creek is located in Lyon County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1896","page":397,"quote":null}},{"id":"4a8921e948e3d998","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Walker River, East Fork at the state line (NAC 445A.1898): The limits of this table apply to the body of water known as the East Fork of the Walker River at the California-Nevada state line. This segment of the East Fork of the Walker River is located in Lyon County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1898","page":399,"quote":null}},{"id":"f966b0b2e0f9c629","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Walker River, East Fork at Bridge B-1475 (NAC 445A.1902): The limits of this table apply to the body of water known as the East Fork of the Walker River from the California-Nevada state line to Bridge B-1475. This segment of the East Fork of the Walker River is located in Lyon County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1902","page":400,"quote":null}},{"id":"836030c1f511c1c5","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Walker River, East Fork at the West Fork of the Walker River (NAC 445A.1904): The limits of this table apply to the body of water known as the East Fork of the Walker River from Bridge B-1475 to its confluence with the West Fork of the Walker River near Nordyke Road. This segment of the East Fork of the Walker River is located in Lyon County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1904","page":402,"quote":null}},{"id":"e81c351dbb9d828d","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Walker River at the Walker River Indian Reservation (NAC 445A.1906): The limits of this table apply to the body of water known as the Walker River from the confluence of the East Fork of the Walker River and the West Fork of the Walker River to the exterior border of the Walker River Indian Reservation. This segment of the Walker River is located in Lyon County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1906","page":404,"quote":null}},{"id":"be21755a50732d13","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Walker River at Walker Lake (NAC 445A.1908): The limits of this table apply to the Walker River from the exterior border of the Walker River Indian Reservation to Walker Lake. This segment of the Walker River is located in Mineral County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1908","page":406,"quote":null}},{"id":"af107bddb18b7b3d","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Desert Creek (NAC 445A.1916): The limits of this table apply to the body of water known as Desert Creek from the California-Nevada state line to its confluence with the West Fork of the Walker River. Desert Creek is located in Douglas and Lyon Counties; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1916","page":409,"quote":null}},{"id":"1611e6de42a539fb","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Chiatovich Creek (NAC 445A.1956): The limits of this table apply to the body of water known as Chiatovich Creek above the highway maintenance station. Chiatovich Creek is located in Esmeralda County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1956","page":424,"quote":null}},{"id":"ab73e1529dd581f5","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Indian Creek (NAC 445A.1958): The limits of this table apply to the body of water known as Indian Creek above the center of section 9, T. 2 S., R. 34 E., M.D.B. & M. Indian Creek is located in Esmeralda County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1958","page":426,"quote":null}},{"id":"ed77fab9778135f1","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Leidy Creek (NAC 445A.1962): The limits of this table apply to the body of water known as Leidy Creek above the hydroelectric plant. Leidy Creek is located in Esmeralda County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.1962","page":428,"quote":null}},{"id":"97865e36e8be8fa0","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Snake Creek above the fish hatchery (NAC 445A.2096): The limits of this table apply to the body of water known as Snake Creek above the fish hatchery. This segment of Snake Creek is located in White Pine County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.2096","page":477,"quote":null}},{"id":"4593231d5a9efe6f","parameter":"pH change (ΔpH)","value":"± 0.5","value_num":0.5,"unit":"SU","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:ph change","place":["US-NV"],"conditions":["receiving_water is freshwater","cites is a NAC 445A control-point section (NAC 445A.1254 to 445A.2214)","Colorado River below Davis Dam (NAC 445A.2146): The limits of this table apply to the body of water known as the Colorado River from Davis Dam to the California-Nevada state line, except for the length of the river within the exterior borders of the Fort Mojave Indian Reservation. This segment of the Colorado River is located in Clark County; a control point's criteria apply upstream to the next control point or named water (NAC 445A.1239)"],"cite":{"instrument":"us_nv_cp","title":"Nevada NAC 445A.1254 to 445A.2214: standards of water quality at each control point (requirements to maintain existing higher quality and water quality criteria to protect beneficial uses)","issuer":"State of Nevada, State Environmental Commission (Division of Environmental Protection)","edition":"NAC Chapter 445A Water Controls effective June 11, 2025, as US EPA posts it in effect for CWA purposes (cover August 20, 2025: EPA approvals since the May 2022 publication in red, removed text as red strikeout)","source_url":"https://www.epa.gov/system/files/documents/2025-11/nvwqs.pdf","source_sha256":"eb1b4a585f250db61459d5e820ab06240338a5084afa75cf6df28dcbf4af2d4d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"NAC 445A.2146","page":490,"quote":null}}],"next":[{"tool":"check_values","says":"Has your user measured this? check_values sets each of their results beside every row held here, with a verdict and the row's cite.","arguments":{"place":"US-NV"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"ph change ph\", value, unit}, ...], any other parameters too."},"post":"/api/v1/check"},{"tool":"read_certificate","says":"Has your user a laboratory certificate? read_certificate reads every row it prints, each with its page, and checks them against these limits.","arguments":{"place":"US-NV"},"needs":{"content_base64":"The laboratory's certificate (PDF) or its XLSX, XLS or CSV export, as base64; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}