{"query":{"parameter":"nitrite n","place":"US-IN","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-IN","US"],"parameter_keys":["name:nitrite - n","name:nitrite-n","name:nitrate and nitrite","name:nitrate-n + nitrite-n","name:nitrate + nitrite","name:nitrate + nitrite as n","name:nitrate/nitrite","name:nitrate/nitrite as n","name:nitrate plus nitrite","cas:14797-65-0","name:nitrite as n","name:nitrite + nitrate","name:nitrite+nitrate"],"names_matched":[["nitrite n","name:nitrite - n"],["nitrite n","name:nitrite-n"],["nitrate and nitrite as n","name:nitrate and nitrite"],["nitrate n nitrite n","name:nitrate-n + nitrite-n"],["nitrate nitrite as n","name:nitrate + nitrite"],["nitrate nitrite as n","name:nitrate + nitrite as n"],["nitrate nitrite as n","name:nitrate/nitrite"],["nitrate nitrite as n","name:nitrate/nitrite as n"],["nitrate plus nitrite as nitrogen n","name:nitrate plus nitrite"],["nitrite as n","cas:14797-65-0"],["nitrite as n","name:nitrite as n"],["nitrite as nitrite n","cas:14797-65-0"],["nitrite as nitrogen n","cas:14797-65-0"],["nitrite expressed as n","cas:14797-65-0"],["nitrite n no2","cas:14797-65-0"],["nitrite nitrate as n","name:nitrite + nitrate"],["nitrite nitrate as n","name:nitrite+nitrate"],["nitrite nitrate both as n","name:nitrite + nitrate"],["nitrite nitrate both as n","name:nitrite+nitrate"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":7,"names":["Nitrite (measured as nitrogen)","Nitrate/Nitrite","Nitrite"],"says":"7 rows share a parameter key with a longer name holding \"nitrite n\" but are printed under names without these words (that key is wider than the name): not sent. Ask for one by its name or CAS number."}},"total":8,"offset":0,"returned":8,"next_offset":null,"rows":[{"id":"e54a856acea5bddf","parameter":"Nitrite-N","value":"one (1) milligram per liter","value_num":1,"unit":"mg/L","statistic":"thirty_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:nitrite-n","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Applicable to All State Waters Except Waters of the State Within the Great Lakes System')","at the point where water is withdrawn for treatment for public water supply (327 IAC 2-1-6(e))"],"cite":{"instrument":"us_in_wqs","title":"Indiana 327 IAC 2 Water Quality Standards: Rule 1 (waters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(e)(6)(B)","page":21,"quote":"(B) concentration of nitrite-N must not exceed one (1) milligram per liter as a thirty (30) day average value."}},{"id":"ac28455ad3d7f96a","parameter":"Nitrite-N","value":"one (1) milligram per liter","value_num":1,"unit":"mg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:nitrite-n","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state within the Great Lakes system (327 IAC 2-1.5-1)","at the point where water is withdrawn for treatment for public water supply (327 IAC 2-1.5-8(f))"],"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 2-1.5-8(f)(6)(B)","page":84,"quote":"(B) concentration of nitrite-N must not exceed one (1) milligram per liter."}},{"id":"b40928f106847302","parameter":"Nitrate-N + nitrite-N","value":"ten (10) milligrams per liter","value_num":10,"unit":"mg/L","statistic":"thirty_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:nitrate-n + nitrite-n","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')","at the point where water is withdrawn for treatment for public water supply (327 IAC 2-1-6(e))"],"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(e)(6)(A)","page":21,"quote":"(A) combined concentration of nitrate-N and nitrite-N must not exceed ten (10) milligrams per liter as a thirty (30) day average value; and"}},{"id":"e580a771ae57a48b","parameter":"Nitrate-N + nitrite-N","value":"ten (10) milligrams per liter","value_num":10,"unit":"mg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:nitrate-n + nitrite-n","place":["US-IN"],"conditions":["receiving_water is freshwater","waters of the state within the Great Lakes system (327 IAC 2-1.5-1)","at the point where water is withdrawn for treatment for public water supply (327 IAC 2-1.5-8(f))"],"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 2-1.5-8(f)(6)(A)","page":84,"quote":"(A) combined concentration of nitrate-N and nitrite-N must not exceed ten (10) milligrams per liter; and"}},{"id":"ee7b591236c21357","parameter":"Nitrate/nitrite as N","value":"4","value_num":4,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:nitrate/nitrite as n","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","existing sources (BAT)","(g) FGD wastewater —(1) 2020 BAT. (i) Except for those discharges to which paragraph (g)(2) or (3) of this section applies, the quantity of pollutants in FGD wastewater shall not exceed the quantity determined by multiplying the flow of FGD wastewater times the concentration listed in table 5 to this paragraph (g)(1)(i). Dischargers must meet the effluent limitations for FGD wastewater in this …","table: Table 5 to Paragraph ( g )(1)( i )"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.13 (BAT)","page":null,"quote":"Nitrate/nitrite as N (mg/L) 4 3"}},{"id":"884b3043b1528c34","parameter":"Nitrate/nitrite as N","value":"3","value_num":3,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:nitrate/nitrite as n","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","existing sources (BAT)","(g) FGD wastewater —(1) 2020 BAT. (i) Except for those discharges to which paragraph (g)(2) or (3) of this section applies, the quantity of pollutants in FGD wastewater shall not exceed the quantity determined by multiplying the flow of FGD wastewater times the concentration listed in table 5 to this paragraph (g)(1)(i). Dischargers must meet the effluent limitations for FGD wastewater in this …","table: Table 5 to Paragraph ( g )(1)( i )"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.13 (BAT)","page":null,"quote":"Nitrate/nitrite as N (mg/L) 4 3"}},{"id":"53d6d195b2d1b594","parameter":"Nitrate/nitrite as N","value":"4","value_num":4,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"name:nitrate/nitrite as n","place":["US"],"conditions":["route is sewer","cites is 40 CFR 423","existing sources (PSES)","(e) FGD wastewater —(1) 2020 PSES. Except as provided for in paragraph (e)(2) of this section, for any electric generating unit with a total nameplate generating capacity of more than 50 megawatts, that is not an oil-fired unit, and that the owner has not certified that it will cease coal combustion pursuant to § 423.19(g), the quantity of pollutants in FGD wastewater shall not exceed the quant…","table: Table 3 to Paragraph (e)(1)"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.16 (PSES)","page":null,"quote":"Nitrate/nitrite as N (mg/L) 4 3"}},{"id":"2c560d831e162389","parameter":"Nitrate/nitrite as N","value":"3","value_num":3,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"name:nitrate/nitrite as n","place":["US"],"conditions":["route is sewer","cites is 40 CFR 423","existing sources (PSES)","(e) FGD wastewater —(1) 2020 PSES. Except as provided for in paragraph (e)(2) of this section, for any electric generating unit with a total nameplate generating capacity of more than 50 megawatts, that is not an oil-fired unit, and that the owner has not certified that it will cease coal combustion pursuant to § 423.19(g), the quantity of pollutants in FGD wastewater shall not exceed the quant…","table: Table 3 to Paragraph (e)(1)"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.16 (PSES)","page":null,"quote":"Nitrate/nitrite as N (mg/L) 4 3"}}],"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-IN"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"nitrite n\", 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-IN"},"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"}]}