{"query":{"parameter":"copper","place":"US-OH","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-OH","US"],"parameter_keys":["cas:7440-50-8","name:arsenic, cadmium (h), copper (h), lead (h), mercury, zinc","name:arsenic, cadmium (h), copper (h), lead (h), zinc","name:cadmium (h), copper (h), mercury, lead (h), zinc","cas:68512-13-0","cas:544-92-3","name:copper - total","name:copper, total","name:copper, total recoverable","name:total copper"],"names_matched":[["copper","cas:7440-50-8"],["arsenic cadmium h copper h lead h mercury zinc h","name:arsenic, cadmium (h), copper (h), lead (h), mercury, zinc"],["arsenic cadmium h copper h lead h zinc h","name:arsenic, cadmium (h), copper (h), lead (h), zinc"],["cadmium h copper h mercury lead h zinc h","name:cadmium (h), copper (h), mercury, lead (h), zinc"],["copper 29h 31h phthalocyaninato 2 kappa n29 kappa n30 kappa n31 kappa n32 brominated chlorinated","cas:68512-13-0"],["copper cyanide","cas:544-92-3"],["copper cyanide 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water's hardness (up to 400 mg/l CaCO3; above 400 the 400 value)"],"cite":{"instrument":"us_oh_wqs","title":"Ohio Administrative Code Chapter 3745-1 Water Quality Standards: statewide aquatic life (Table 35-1, hardness and pH equations 35-9/35-10), wildlife (35-12), public water supply (33-1), agricultural supply (33-3), fish consumption (34-1), aesthetic (37-1) and Ohio river (32-1/32-2) criteria","issuer":"State of Ohio, Environmental Protection Agency","edition":"OAC 3745-1-01 to -44 and -50 to -54, effective March 16, 2026, as US EPA posts it in effect for CWA purposes (cover letter March 25, 2026: EPA disapproved, April 27, 2021, 44 lake Erie public water supply criteria of Table 33-1)","source_url":"https://www.epa.gov/sites/default/files/2015-09/documents/oh_34751_1_to_40.pdf","source_sha256":"129b8170e3fe705fd7b0be22d6ca7eb6bf37bfc003df0348bb42b8e67c60f9d0","fetched_at":"2026-10-14","section":"OAC 3745-1-35 Table 35-9","page":480,"quote":"IMZM3 D4 µg/l e(0.9422 [ln H] - 1.048) 27 52 76 99"}},{"id":"baa45f0e7a6eec21","parameter":"Copper (dissolved)","value":"27","value_num":27,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-50-8","place":["US-OH"],"conditions":["receiving_water is freshwater","hardness 100 mg/l CaCO3 (Table 35-9's example)"],"cite":{"instrument":"us_oh_wqs","title":"Ohio Administrative Code Chapter 3745-1 Water Quality Standards: statewide aquatic life (Table 35-1, hardness and pH equations 35-9/35-10), wildlife (35-12), public water supply (33-1), agricultural supply (33-3), fish consumption (34-1), aesthetic (37-1) and Ohio river (32-1/32-2) criteria","issuer":"State of Ohio, Environmental Protection Agency","edition":"OAC 3745-1-01 to -44 and -50 to -54, effective March 16, 2026, as US EPA posts it in effect for CWA purposes (cover letter March 25, 2026: EPA disapproved, April 27, 2021, 44 lake Erie public water supply criteria of Table 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of Ohio, Environmental Protection Agency","edition":"OAC 3745-1-01 to -44 and -50 to -54, effective March 16, 2026, as US EPA posts it in effect for CWA purposes (cover letter March 25, 2026: EPA disapproved, April 27, 2021, 44 lake Erie public water supply criteria of Table 33-1)","source_url":"https://www.epa.gov/sites/default/files/2015-09/documents/oh_34751_1_to_40.pdf","source_sha256":"129b8170e3fe705fd7b0be22d6ca7eb6bf37bfc003df0348bb42b8e67c60f9d0","fetched_at":"2026-10-14","section":"OAC 3745-1-35 Table 35-9","page":480,"quote":"IMZM3 D4 µg/l e(0.9422 [ln H] - 1.048) 27 52 76 99"}},{"id":"17311c3c513ac7cc","parameter":"Copper (dissolved)","value":"76","value_num":76,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-50-8","place":["US-OH"],"conditions":["receiving_water is freshwater","hardness 300 mg/l CaCO3 (Table 35-9's example)"],"cite":{"instrument":"us_oh_wqs","title":"Ohio Administrative Code Chapter 3745-1 Water Quality Standards: statewide aquatic life (Table 35-1, hardness and pH equations 35-9/35-10), wildlife (35-12), public water supply (33-1), agricultural supply (33-3), fish consumption (34-1), aesthetic (37-1) and Ohio river (32-1/32-2) criteria","issuer":"State of Ohio, Environmental Protection Agency","edition":"OAC 3745-1-01 to -44 and -50 to -54, effective March 16, 2026, as US EPA posts it in effect for CWA purposes (cover letter March 25, 2026: EPA disapproved, April 27, 2021, 44 lake Erie public water supply criteria of Table 33-1)","source_url":"https://www.epa.gov/sites/default/files/2015-09/documents/oh_34751_1_to_40.pdf","source_sha256":"129b8170e3fe705fd7b0be22d6ca7eb6bf37bfc003df0348bb42b8e67c60f9d0","fetched_at":"2026-10-14","section":"OAC 3745-1-35 Table 35-9","page":480,"quote":"IMZM3 D4 µg/l e(0.9422 [ln H] - 1.048) 27 52 76 99"}},{"id":"30b442e2578c6af1","parameter":"Copper (dissolved)","value":"99","value_num":99,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-50-8","place":["US-OH"],"conditions":["receiving_water is freshwater","hardness 400 mg/l CaCO3 or above (note 6: the 400 mg/l criteria are used above 400)"],"cite":{"instrument":"us_oh_wqs","title":"Ohio Administrative Code Chapter 3745-1 Water Quality Standards: statewide aquatic life (Table 35-1, hardness and pH equations 35-9/35-10), wildlife (35-12), public water supply (33-1), agricultural supply (33-3), fish consumption (34-1), aesthetic (37-1) and Ohio river (32-1/32-2) criteria","issuer":"State of Ohio, Environmental Protection Agency","edition":"OAC 3745-1-01 to -44 and -50 to -54, effective March 16, 2026, as US EPA posts it in effect for CWA purposes (cover letter March 25, 2026: EPA disapproved, April 27, 2021, 44 lake Erie public water supply criteria of Table 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50"}},{"id":"38b612cdf7a4fba8","parameter":"Copper (dissolved)","value":"26","value_num":26,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-50-8","place":["US-OH"],"conditions":["receiving_water is freshwater","hardness 200 mg/l CaCO3 (Table 35-9's example)"],"cite":{"instrument":"us_oh_wqs","title":"Ohio Administrative Code Chapter 3745-1 Water Quality Standards: statewide aquatic life (Table 35-1, hardness and pH equations 35-9/35-10), wildlife (35-12), public water supply (33-1), agricultural supply (33-3), fish consumption (34-1), aesthetic (37-1) and Ohio river (32-1/32-2) criteria","issuer":"State of Ohio, Environmental Protection Agency","edition":"OAC 3745-1-01 to -44 and -50 to -54, effective March 16, 2026, as US EPA posts it in effect for CWA purposes (cover letter March 25, 2026: EPA disapproved, April 27, 2021, 44 lake Erie public water supply criteria of Table 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400)"],"cite":{"instrument":"us_oh_wqs","title":"Ohio Administrative Code Chapter 3745-1 Water Quality Standards: statewide aquatic life (Table 35-1, hardness and pH equations 35-9/35-10), wildlife (35-12), public water supply (33-1), agricultural supply (33-3), fish consumption (34-1), aesthetic (37-1) and Ohio river (32-1/32-2) criteria","issuer":"State of Ohio, Environmental Protection Agency","edition":"OAC 3745-1-01 to -44 and -50 to -54, effective March 16, 2026, as US EPA posts it in effect for CWA purposes (cover letter March 25, 2026: EPA disapproved, April 27, 2021, 44 lake Erie public water supply criteria of Table 33-1)","source_url":"https://www.epa.gov/sites/default/files/2015-09/documents/oh_34751_1_to_40.pdf","source_sha256":"129b8170e3fe705fd7b0be22d6ca7eb6bf37bfc003df0348bb42b8e67c60f9d0","fetched_at":"2026-10-14","section":"OAC 3745-1-35 Table 35-9","page":480,"quote":"OMZM3 D4 µg/l e(0.9422 [ln H] - 1.741) 13 26 38 50"}},{"id":"268cfa290c5e201e","parameter":"Copper (dissolved)","value":"e(0.8545 [ln H] - 1.743)","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-50-8","place":["US-OH"],"conditions":["receiving_water is freshwater","hardness-dependent: the row's equation of the receiving water's hardness (up to 400 mg/l CaCO3; above 400 the 400 value)"],"cite":{"instrument":"us_oh_wqs","title":"Ohio Administrative Code Chapter 3745-1 Water Quality Standards: statewide aquatic life (Table 35-1, hardness and pH equations 35-9/35-10), wildlife (35-12), public water supply (33-1), agricultural supply (33-3), fish consumption (34-1), aesthetic (37-1) and Ohio river (32-1/32-2) criteria","issuer":"State of Ohio, Environmental Protection Agency","edition":"OAC 3745-1-01 to -44 and -50 to -54, effective March 16, 2026, as US EPA posts it in effect for CWA purposes (cover letter March 25, 2026: EPA disapproved, April 27, 2021, 44 lake Erie public water supply criteria of Table 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3745-1 Water Quality Standards: statewide aquatic life (Table 35-1, hardness and pH equations 35-9/35-10), wildlife (35-12), public water supply (33-1), agricultural supply (33-3), fish consumption (34-1), aesthetic (37-1) and Ohio river (32-1/32-2) criteria","issuer":"State of Ohio, Environmental Protection Agency","edition":"OAC 3745-1-01 to -44 and -50 to -54, effective March 16, 2026, as US EPA posts it in effect for CWA purposes (cover letter March 25, 2026: EPA disapproved, April 27, 2021, 44 lake Erie public water supply criteria of Table 33-1)","source_url":"https://www.epa.gov/sites/default/files/2015-09/documents/oh_34751_1_to_40.pdf","source_sha256":"129b8170e3fe705fd7b0be22d6ca7eb6bf37bfc003df0348bb42b8e67c60f9d0","fetched_at":"2026-10-14","section":"OAC 3745-1-35 Table 35-9","page":480,"quote":"OMZA3 D4 µg/l e(0.8545 [ln H] - 1.743) 9.0 16 23 29"}},{"id":"a15d4fe35bf50cd6","parameter":"Copper 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(32-1/32-2) criteria","issuer":"State of Ohio, Environmental Protection Agency","edition":"OAC 3745-1-01 to -44 and -50 to -54, effective March 16, 2026, as US EPA posts it in effect for CWA purposes (cover letter March 25, 2026: EPA disapproved, April 27, 2021, 44 lake Erie public water supply criteria of Table 33-1)","source_url":"https://www.epa.gov/sites/default/files/2015-09/documents/oh_34751_1_to_40.pdf","source_sha256":"129b8170e3fe705fd7b0be22d6ca7eb6bf37bfc003df0348bb42b8e67c60f9d0","fetched_at":"2026-10-14","section":"OAC 3745-1-35 Table 35-9","page":480,"quote":"OMZA3 D4 µg/l e(0.8545 [ln H] - 1.743) 9.0 16 23 29"}},{"id":"0f093337fdf8b4ab","parameter":"Copper (total recoverable)","value":"e(0.9422 [ln H] - 1.007)","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-50-8","place":["US-OH"],"conditions":["receiving_water is freshwater","hardness-dependent: the row's equation of the receiving water's 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