{"query":{"parameter":"nitrite","place":"US-MD","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MD","US"],"parameter_keys":["cas:14797-65-0","cas:71487-01-9","cas:109-95-5","cas:110-46-3","cas:542-56-3","name:nitrate and nitrite","cas:14797-55-8","name:nitrate-n + nitrite-n","name:nitrate + nitrite","name:nitrate + nitrite as n","name:nitrate+nitrite","name:nitrate/nitrite","name:nitrate/nitrite as n","name:nitrate plus nitrite","name:nitrate plus nitrite nitrogen","name:nitrite as n","cas:7632-00-0","name:nitrite - n","name:nitrite-n","name:nitrite + nitrate","name:nitrite+nitrate","name:nitrite plus nitrate","name:total nitrate and nitrite","name:total nitrate + nitrite","name:nitrates et nitrites","name:nitrates + nitrites","name:nitrates+nitrites"],"names_matched":[["nitrite","cas:14797-65-0"],["bis coconut oil alkyl dimethylammonium nitrite","cas:71487-01-9"],["ethyl nitrite","cas:109-95-5"],["isoamyl nitrite","cas:110-46-3"],["isobutyl nitrite","cas:542-56-3"],["nitrate and nitrite","name:nitrate and nitrite"],["nitrate and nitrite as n","name:nitrate and nitrite"],["nitrate as n criterion also applies to total nitrate nitrite","cas:14797-55-8"],["nitrate n nitrite n","name:nitrate-n + nitrite-n"],["nitrate nitrite","name:nitrate + nitrite"],["nitrate nitrite","name:nitrate + nitrite as n"],["nitrate nitrite","name:nitrate+nitrite"],["nitrate nitrite","name:nitrate/nitrite"],["nitrate nitrite","name:nitrate/nitrite as 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"],["nitrate nitrite as n","name:nitrate/nitrite as n"],["nitrate nitrite as nitrogen","name:nitrate + nitrite"],["nitrate nitrite as nitrogen","name:nitrate + nitrite as n"],["nitrate nitrite as nitrogen","name:nitrate+nitrite"],["nitrate nitrite as nitrogen","name:nitrate/nitrite"],["nitrate nitrite as nitrogen","name:nitrate/nitrite as n"],["nitrate nitrite sum as nitrogen","name:nitrate + nitrite"],["nitrate nitrite sum as nitrogen","name:nitrate + nitrite as n"],["nitrate nitrite sum as nitrogen","name:nitrate+nitrite"],["nitrate nitrite sum as nitrogen","name:nitrate/nitrite"],["nitrate nitrite sum as nitrogen","name:nitrate/nitrite as n"],["nitrate plus nitrite","name:nitrate plus nitrite"],["nitrate plus nitrite as nitrogen n","name:nitrate plus nitrite"],["nitrate plus nitrite nitrogen","name:nitrate plus nitrite nitrogen"],["nitrite as n","name:nitrite as n"],["nitrite d ethyle","cas:109-95-5"],["nitrite d isoamyle","cas:110-46-3"],["nitrite de sodium","cas:7632-00-0"],["nitrite n","name:nitrite - n"],["nitrite n","name:nitrite-n"],["nitrite nitrate","name:nitrite + nitrate"],["nitrite nitrate","name:nitrite+nitrate"],["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"],["nitrite plus nitrate","name:nitrite plus nitrate"],["sodium nitrite","cas:7632-00-0"],["total nitrate and nitrite","name:total nitrate and nitrite"],["total nitrate and nitrite as nitrogen","name:total nitrate and nitrite"],["total nitrate nitrite","name:total nitrate + nitrite"],["dicoco alkyldimethyl ammonium nitrites","cas:71487-01-9","nitrites"],["nitrates et nitrites","name:nitrates et nitrites","nitrites"],["nitrates et nitrites n no2 et n no3","name:nitrates et nitrites","nitrites"],["nitrates nitrites","name:nitrates + nitrites","nitrites"],["nitrates nitrites","name:nitrates+nitrites","nitrites"],["nitrates nitrites exprimes en n","name:nitrates + nitrites","nitrites"],["nitrates nitrites exprimes en n","name:nitrates+nitrites","nitrites"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":28,"names":["Nitrate (as N)","Nitrate (measured as nitrogen)","Nitrate","Nitrates"],"says":"28 rows share a parameter key with a longer name holding \"nitrite\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"nitrite\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":13,"offset":0,"returned":13,"next_offset":null,"rows":[{"id":"1513f24213fb7545","parameter":"Nitrite","value":"1 (as Nitrogen)","value_num":1,"unit":"mg/l","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:14797-65-0","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level goals are nonenforceable health goals."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"141.51, 141.62","page":null,"quote":null,"column":"mclg"}},{"id":"be974dcd13e20a4a","parameter":"Nitrite","value":"1 (as Nitrogen)","value_num":1,"unit":"mg/l","direction":"max","kind":"limit","medium":"drinking_water","level":"national","parameter_key":"cas:14797-65-0","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"141.51, 141.62","page":null,"quote":null,"column":"mcl"}},{"id":"60e77fb906d9c521","parameter":"Nitrite (measured as nitrogen)","value":"7800","value_num":7800,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:14797-65-0","place":["US"],"conditions":["Resident Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"not verified"},"section":null,"page":null,"quote":null,"table":"sols","column":"residentiel"}},{"id":"057c821e816780dd","parameter":"Nitrite (measured as nitrogen)","value":"120000","value_num":120000,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:14797-65-0","place":["US"],"conditions":["Industrial Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"not verified"},"section":null,"page":null,"quote":null,"table":"sols","column":"industriel"}},{"id":"4223d284947f2776","parameter":"Nitrite (measured as nitrogen)","value":"2000","value_num":2000,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:14797-65-0","place":["US"],"conditions":["Tap Water (ug/L): Regional Screening Level (RSL) Summary Table (TR=1E-06, HQ=1) November 2024"],"cite":{"instrument":"us_rsl_tapwater","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Tap Water","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"not verified"},"section":null,"page":null,"quote":null,"table":"eau","column":"eau_robinet"}},{"id":"ff236569b4a13740","parameter":"Nitrate/Nitrite","value":"2.0","value_num":2,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:nitrate/nitrite","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","existing sources (BAT)","(3) Voluntary incentives plan. (i) For dischargers who voluntarily choose to meet the effluent limitations for FGD wastewater in this paragraph (g)(3)(i), 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 7 to this paragraph (g)(3)(i). Dischargers who choose to meet the effluent…","table: Table 7 to Paragraph ( g )(3)( 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":"not verified"},"section":"40 CFR 423.13 (BAT)","page":null,"quote":"Nitrate/Nitrite (mg/L) 2.0 1.2"}},{"id":"bd56f70d10e7221f","parameter":"Nitrate/Nitrite","value":"1.2","value_num":1.2,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:nitrate/nitrite","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","existing sources (BAT)","(3) Voluntary incentives plan. (i) For dischargers who voluntarily choose to meet the effluent limitations for FGD wastewater in this paragraph (g)(3)(i), 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 7 to this paragraph (g)(3)(i). Dischargers who choose to meet the effluent…","table: Table 7 to Paragraph ( g )(3)( 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":"not verified"},"section":"40 CFR 423.13 (BAT)","page":null,"quote":"Nitrate/Nitrite (mg/L) 2.0 1.2"}},{"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"section":"40 CFR 423.16 (PSES)","page":null,"quote":"Nitrate/nitrite as N (mg/L) 4 3"}},{"id":"b096c4b022e2b10c","parameter":"Total Nitrate and Nitrite","value":"10 (as Nitrogen)","value_num":10,"unit":"mg/l","direction":"max","kind":"limit","medium":"drinking_water","level":"national","parameter_key":"name:total nitrate and nitrite","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"141.62","page":null,"quote":null,"column":"mcl"}},{"id":"abfeca3a6d00b7f6","parameter":"Total Nitrate + Nitrite","value":"10 (as Nitrogen)","value_num":10,"unit":"mg/l","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"name:total nitrate + nitrite","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level goals are nonenforceable health goals."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"141.51","page":null,"quote":null,"column":"mclg"}}],"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-MD"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"nitrite\", 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-MD"},"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"}]}