{"query":{"parameter":"chromium iii","place":"US-WI","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-WI","US"],"parameter_keys":["cas:16065-83-1","name:chromium ii iii","cas:7440-47-3","name:chromium (+3)","name:chromium +3, total"],"names_matched":[["chromium iii","cas:16065-83-1"],["chromium ii iii","name:chromium ii iii"],["chromium 3","cas:7440-47-3","chromium 3"],["chromium 3","name:chromium (+3)","chromium 3"],["chromium 3 total","name:chromium +3, total","chromium 3"],["chromium 3 total recoverable","name:chromium (+3)","chromium 3"],["chromium and chromium compounds metallic divalent and trivalent","name:chromium ii iii","chromium trivalent"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":2532,"names":["Chromium","Chromium (total)","Total chromium","Total Chromium","Chromium (Total)","Chromium (T)","Cr","Chromium, total"],"says":"2532 rows share a parameter key with a longer name holding \"chromium iii\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"chromium iii\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":26,"offset":0,"returned":26,"next_offset":null,"rows":[{"id":"c4053cd2b767fe40","parameter":"Chromium (+3) (total recoverable)","value":"V 0.819, ln ACI 3.7256","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","hardness-dependent: the table's equation with the row's V and ln ACI; printed, not evaluated"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.05 Table 2","page":9,"quote":"All Surface Waters 0.819 3.7256 1022 1803 3181"}},{"id":"2557e2b39c9cec6c","parameter":"Chromium (+3) (total recoverable)","value":"1022","value_num":1022,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","hardness 50 ppm as CaCO3 (Table 2's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.05 Table 2","page":9,"quote":"All Surface Waters 0.819 3.7256 1022 1803 3181"}},{"id":"e30d042db59cc566","parameter":"Chromium (+3) (total recoverable)","value":"1803","value_num":1803,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","hardness 100 ppm as CaCO3 (Table 2's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.05 Table 2","page":9,"quote":"All Surface Waters 0.819 3.7256 1022 1803 3181"}},{"id":"4550ab9f7d0567f5","parameter":"Chromium (+3) (total recoverable)","value":"3181","value_num":3181,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","hardness 200 ppm as CaCO3 (Table 2's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.05 Table 2","page":9,"quote":"All Surface Waters 0.819 3.7256 1022 1803 3181"}},{"id":"128576b391095550","parameter":"Chromium (+3) (total recoverable)","value":"V 0.819, ln CCI 0.6851","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","cold water community (NR 102.04(3)(a))","hardness-dependent: the table's equation with the row's V and ln CCI; printed, not evaluated"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"Cold Water 0.819 0.6851 48.86 86.21 152.1"}},{"id":"28163d7cd91dd0b9","parameter":"Chromium (+3) (total recoverable)","value":"48.86","value_num":48.86,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","cold water community (NR 102.04(3)(a))","hardness 50 ppm as CaCO3 (Table 6's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"Cold Water 0.819 0.6851 48.86 86.21 152.1"}},{"id":"2c25461b7e7b7b8f","parameter":"Chromium (+3) (total recoverable)","value":"86.21","value_num":86.21,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","cold water community (NR 102.04(3)(a))","hardness 100 ppm as CaCO3 (Table 6's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"Cold Water 0.819 0.6851 48.86 86.21 152.1"}},{"id":"d822e8943515ac65","parameter":"Chromium (+3) (total recoverable)","value":"152.1","value_num":152.1,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","cold water community (NR 102.04(3)(a))","hardness 200 ppm as CaCO3 (Table 6's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"Cold Water 0.819 0.6851 48.86 86.21 152.1"}},{"id":"2d18aa3dfacbf12f","parameter":"Chromium (+3) (total recoverable)","value":"V 0.819, ln CCI 1.112","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","warm water sport fish community (NR 102.04(3)(b))","hardness-dependent: the table's equation with the row's V and ln CCI; printed, not evaluated"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"Warm Water Sportfish 0.819 1.112 74.88 132.1 233.1"}},{"id":"06eead5bbac8ad5d","parameter":"Chromium (+3) (total recoverable)","value":"74.88","value_num":74.88,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","warm water sport fish community (NR 102.04(3)(b))","hardness 50 ppm as CaCO3 (Table 6's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"Warm Water Sportfish 0.819 1.112 74.88 132.1 233.1"}},{"id":"2519295b7b414a97","parameter":"Chromium (+3) (total recoverable)","value":"132.1","value_num":132.1,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","warm water sport fish community (NR 102.04(3)(b))","hardness 100 ppm as CaCO3 (Table 6's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"Warm Water Sportfish 0.819 1.112 74.88 132.1 233.1"}},{"id":"3466b82ff96894a1","parameter":"Chromium (+3) (total recoverable)","value":"233.1","value_num":233.1,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","warm water sport fish community (NR 102.04(3)(b))","hardness 200 ppm as CaCO3 (Table 6's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"Warm Water Sportfish 0.819 1.112 74.88 132.1 233.1"}},{"id":"fbf97380b169b8c4","parameter":"Chromium (+3) (total recoverable)","value":"V 0.819, ln CCI 1.112","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","waters other than cold water and warm water sport fish communities (Table 6's 'All others')","hardness-dependent: the table's equation with the row's V and ln CCI; printed, not evaluated"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"All others 0.819 1.112 74.88 132.1 233.1"}},{"id":"33f254ed8f79b71f","parameter":"Chromium (+3) (total recoverable)","value":"74.88","value_num":74.88,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","waters other than cold water and warm water sport fish communities (Table 6's 'All others')","hardness 50 ppm as CaCO3 (Table 6's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"All others 0.819 1.112 74.88 132.1 233.1"}},{"id":"4e45f421632b513f","parameter":"Chromium (+3) (total recoverable)","value":"132.1","value_num":132.1,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","waters other than cold water and warm water sport fish communities (Table 6's 'All others')","hardness 100 ppm as CaCO3 (Table 6's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"All others 0.819 1.112 74.88 132.1 233.1"}},{"id":"1f0bd28dcc1701b4","parameter":"Chromium (+3) (total recoverable)","value":"233.1","value_num":233.1,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chromium (+3)","place":["US-WI"],"conditions":["receiving_water is freshwater","waters other than cold water and warm water sport fish communities (Table 6's 'All others')","hardness 200 ppm as CaCO3 (Table 6's example)"],"cite":{"instrument":"us_wi_wqs","title":"Wisconsin Administrative Code ch. NR 105 surface water quality criteria for toxic substances (acute and chronic aquatic life, wildlife, human threshold and human cancer) and ch. NR 102 dissolved oxygen, pH, PFOS/PFOA and total phosphorus criteria","issuer":"State of Wisconsin, Department of Natural Resources","edition":"NR 105 as last amended Register July 2010 No. 655 (eff. 8-1-10) and NR 102 effective April 26, 2024 (Register January 2024 No. 817), as US EPA posts them in effect for CWA purposes; EPA disapproved NR 105's copper and nickel acute and chronic criteria (Tables 2 and 6) and the endrin chronic criterion (Table 5), replaced by 40 CFR 132 Tables 1 and 2","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/wiwqs-nr105.pdf","source_sha256":"c41f1ef79ba951936c9998711fca196f6e6b27dff311ba17b27d938b39cb0063","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"NR 105.06 Table 6","page":12,"quote":"All others 0.819 1.112 74.88 132.1 233.1"}},{"id":"f7e7e982fe5f3a70","parameter":"Chromium (III)","value":"570","value_num":570,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is freshwater","Freshwater CMC (acute): criterion maximum concentration, acute","corresponds to a hardness of 100 mg/L as CaCO3 (the table's value; the criterion is a function of hardness)"],"cite":{"instrument":"us_nrwqc_aquatic","title":"EPA National Recommended Water Quality Criteria — Aquatic Life Criteria Table (freshwater and saltwater CMC/CCC)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table, last updated on June 9, 2026 (fetched 2026-10-09); each criterion carries its publication year","source_url":"https://www.epa.gov/wqc/national-recommended-water-quality-criteria-aquatic-life-criteria-table","source_sha256":"be6b429558db9852c3456eb22c17046aa1a3335ee89e702e8afb793f9b5b25ec","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"National Recommended Aquatic Life Criteria table","page":null,"quote":"Chromium (III) (P) 16065831 570 74 — — 1995"}},{"id":"8be5c44fff00162f","parameter":"Chromium (III)","value":"exp{0.8190 [ln(hardness)] + 3.7256} × CF, CF = 0.316","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is freshwater","Freshwater CMC (acute), computed at the receiving water's hardness (mg/L as CaCO3) by the printed equation; 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