{"query":{"parameter":"zinc","place":"US-IN","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-IN","US"],"parameter_keys":["cas:7440-66-6","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","name:chemical oxygen demand, arsenic, radium (dissolved and total, uranium, zinc","name:iron, nickel (h), zinc","name:total zinc","name:total zinc (freshwater","name:zinc-65","cas:7646-85-7","cas:557-21-1","name:zinc extractible","cas:1314-84-7","name:zinc - total","name:zinc, total"],"names_matched":[["zinc","cas:7440-66-6"],["arsenic cadmium h copper h lead h mercury zinc","name:arsenic, cadmium (h), copper (h), lead (h), mercury, zinc"],["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","name:arsenic, cadmium (h), copper (h), lead (h), 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(freshwater"],["zinc 65","name:zinc-65"],["zinc chloride","cas:7646-85-7"],["zinc cyanide","cas:557-21-1"],["zinc cyanide zn cn 2","cas:557-21-1"],["zinc extractible","name:zinc extractible"],["zinc phosphide","cas:1314-84-7"],["zinc phosphide when present at concentrations 10","cas:1314-84-7"],["zinc phosphide zn3 p2","cas:1314-84-7"],["zinc phosphide zn3p2","cas:1314-84-7"],["zinc total","name:zinc - total"],["zinc total","name:zinc, total"]],"match":"exact+contains","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":3414,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"b9c09ab98dac393e","parameter":"Zinc (dissolved)","value":"WER (e(0.8473[lnH]+0.884))(CF)","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness-dependent: the row's equation of the receiving water's hardness (the hardness used is at most 400 mg/l CaCO3, note [2])"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 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CaCO3, note [2])"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) disapproved)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/inwqs.pdf","source_sha256":"a1d0dba2ac83057cf619f9e0cb6f1fe5c8f9c908928310f266936510d4211a1c","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"327 IAC 2-1-6(a)(3) Table 6-1","page":8,"quote":null}},{"id":"242c81ec3d9c5e4b","parameter":"Zinc (dissolved)","value":"WER (e(0.8473 [lnH] + 0.884))(CF)","unit":"µg/L","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state within the Great Lakes system (327 IAC 2-1.5-1)","hardness-dependent: the row's equation of the receiving water's hardness (the hardness used is at most 400 mg/l CaCO3, note [3])"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) 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1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) disapproved)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/inwqs.pdf","source_sha256":"a1d0dba2ac83057cf619f9e0cb6f1fe5c8f9c908928310f266936510d4211a1c","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"327 IAC 2-1.5-8(b)(3) Table 8-1","page":73,"quote":null}},{"id":"386d40f618069c86","parameter":"Zinc (dissolved)","value":"65","value_num":65,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness 50 mg/l CaCO3 (the table's row)"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) disapproved)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/inwqs.pdf","source_sha256":"a1d0dba2ac83057cf619f9e0cb6f1fe5c8f9c908928310f266936510d4211a1c","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"327 IAC 2-1-6(a)(5) Table 6-2","page":12,"quote":"50 30 1.2 260 29 0.49 – 65 66"}},{"id":"dd74fe919ad70571","parameter":"Zinc (dissolved)","value":"66","value_num":66,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness 50 mg/l CaCO3 (the table's row)"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) disapproved)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/inwqs.pdf","source_sha256":"a1d0dba2ac83057cf619f9e0cb6f1fe5c8f9c908928310f266936510d4211a1c","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"327 IAC 2-1-6(a)(5) Table 6-2","page":12,"quote":"50 30 1.2 260 29 0.49 – 65 66"}},{"id":"bcf7030d093af77e","parameter":"Zinc (dissolved)","value":"120","value_num":120,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness 100 mg/l CaCO3 (the table's row)"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) disapproved)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/inwqs.pdf","source_sha256":"a1d0dba2ac83057cf619f9e0cb6f1fe5c8f9c908928310f266936510d4211a1c","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"327 IAC 2-1-6(a)(5) Table 6-2","page":12,"quote":"100 65 2.5 470 52 1.6 – 120 120"}},{"id":"8e6bdeafa9e4aac7","parameter":"Zinc (dissolved)","value":"120","value_num":120,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness 100 mg/l CaCO3 (the table's row)"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) disapproved)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/inwqs.pdf","source_sha256":"a1d0dba2ac83057cf619f9e0cb6f1fe5c8f9c908928310f266936510d4211a1c","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"327 IAC 2-1-6(a)(5) Table 6-2","page":12,"quote":"100 65 2.5 470 52 1.6 – 120 120"}},{"id":"193dec55a606db76","parameter":"Zinc (dissolved)","value":"170","value_num":170,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness 150 mg/l CaCO3 (the table's row)"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) disapproved)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/inwqs.pdf","source_sha256":"a1d0dba2ac83057cf619f9e0cb6f1fe5c8f9c908928310f266936510d4211a1c","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"327 IAC 2-1-6(a)(5) Table 6-2","page":12,"quote":"150 100 3.9 660 73 3.2 – 170 170"}},{"id":"786c944f3669f886","parameter":"Zinc (dissolved)","value":"170","value_num":170,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness 150 mg/l CaCO3 (the table's row)"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters 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(dissolved)","value":"210","value_num":210,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness 200 mg/l CaCO3 (the table's row)"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) disapproved)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/inwqs.pdf","source_sha256":"a1d0dba2ac83057cf619f9e0cb6f1fe5c8f9c908928310f266936510d4211a1c","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"327 IAC 2-1-6(a)(5) Table 6-2","page":12,"quote":"200 140 5.3 840 93 5.3 – 210 210"}},{"id":"43a6ba67f8cf6586","parameter":"Zinc (dissolved)","value":"210","value_num":210,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness 200 mg/l CaCO3 (the table's row)"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) disapproved)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/inwqs.pdf","source_sha256":"a1d0dba2ac83057cf619f9e0cb6f1fe5c8f9c908928310f266936510d4211a1c","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"327 IAC 2-1-6(a)(5) Table 6-2","page":12,"quote":"200 140 5.3 840 93 5.3 – 210 210"}},{"id":"4f7e8de503d52e2a","parameter":"Zinc (dissolved)","value":"250","value_num":250,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness 250 mg/l CaCO3 (the table's row)"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) 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(dissolved)","value":"300","value_num":300,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-66-6","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state outside the Great Lakes system (327 IAC 2-1: 'Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","hardness 300 mg/l CaCO3 (the table's row)"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters outside the Great Lakes system) and Rule 1.5 (the Great Lakes system) aquatic life, human health, wildlife, chloride, sulfate and use criteria","issuer":"State of Indiana, Environmental Rules Board (Department of Environmental Management)","edition":"327 IAC 2 (Article 2) effective October 18, 2023, as US EPA posts it in effect for CWA purposes (cover November 28, 2023: only the variance provision 327 IAC 2-1.5-17(b) 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