{"query":{"parameter":"selenium dissolved","place":"US-NV","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-NV","US"],"parameter_keys":["cas:7782-49-2","name:selenium, dissolved"],"names_matched":[["selenium dissolved","cas:7782-49-2"],["selenium dissolved","name:selenium, dissolved"]],"match":"exact","order":"The place's own instruments first, then each place above it, each in its register's order; rows for a marine receiving water after the rest, as none of the place's own rows names a marine, salt, estuarine, coastal or ocean water"},"total":100,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"53662fb1c182f7f0","parameter":"Selenium","value":"50","value_num":50,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7782-49-2","place":["US-NV"],"conditions":["receiving_water is freshwater","waters with the beneficial use municipal or domestic supply (the uses each water carries are set in NAC 445A.123 to 445A.2234; site-specific standards for toxic materials take precedence, subsection 1)"],"cite":{"instrument":"us_nv_wqs","title":"Nevada NAC 445A.1236 Standards for toxic materials applicable to designated waters; NAC 445A.1237 selenium for aquatic life, with the Las Vegas Wash's own values; NAC 445A.1233 Colorado River salinity","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","section":"NAC 445A.1236 subsection 2","page":82,"quote":"Selenium 50b See NAC 445A.1237 20d 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watering of livestock (the uses each water carries are set in NAC 445A.123 to 445A.2234; site-specific standards for toxic materials take precedence, subsection 1)"],"cite":{"instrument":"us_nv_wqs","title":"Nevada NAC 445A.1236 Standards for toxic materials applicable to designated waters; NAC 445A.1237 selenium for aquatic life, with the Las Vegas Wash's own values; NAC 445A.1233 Colorado River salinity","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","section":"NAC 445A.1236 subsection 2","page":82,"quote":"Selenium 50b See NAC 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445A.1237(8))"],"cite":{"instrument":"us_nv_wqs","title":"Nevada NAC 445A.1236 Standards for toxic materials applicable to designated waters; NAC 445A.1237 selenium for aquatic life, with the Las Vegas Wash's own values; NAC 445A.1233 Colorado River salinity","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","section":"NAC 445A.1237(7)","page":87,"quote":null}},{"id":"216b5eb74d40f962","parameter":"Selenium, 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Subpart AJ—Copper Sulfate, Copper Chloride, Copper Iodide, Copper Nitrate"],"cite":{"instrument":"us_40cfr415","title":"40 CFR Part 415 — PART 415—INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=415","source_sha256":"ebf67428a51e85f12785b92d537e6878c5f9838c87722ac2db82b3db673d1e23","fetched_at":"2026-09-24","section":"40 CFR 415.362 (BPT)","page":null,"quote":"Selenium (T) 0.0015 0.00050"}},{"id":"44a749a15f97f4ad","parameter":"Selenium (T)","value":"0.00050","value_num":0.0005,"unit":"Kg/kkg (or pounds per/1,000 lb) of product","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7782-49-2","place":["US"],"conditions":["route is direct","cites is 40 CFR 415","the discharge is of the Subpart AJ—Copper Salts Production 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