{"query":{"parameter":"heptachlor epoxide","place":"US-MD","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MD","US"],"parameter_keys":["cas:1024-57-3","cas:76-44-8","name:heptachlor & heptachlor epoxide","name:heptachlor*","name:heptachlor und heptachlorepoxid","name:epoxyde d’heptachlore","name:heptachlore* et epoxyde d’heptachlore*"],"names_matched":[["heptachlor epoxide","cas:1024-57-3"],["heptachlor and its epoxide","cas:76-44-8"],["heptachlor heptachlor epoxide","cas:76-44-8"],["heptachlor heptachlor epoxide","name:heptachlor & heptachlor epoxide"],["heptachlor heptachlor epoxide total","name:heptachlor & heptachlor epoxide"],["heptachlor","cas:76-44-8","heptachlor"],["heptachlor","name:heptachlor*","heptachlor"],["heptachlor und heptachlorepoxid","name:heptachlor und heptachlorepoxid","heptachlor"],["epoxyde d heptachlore","name:epoxyde d’heptachlore","epoxyde d heptachlore"],["heptachlore et epoxyde d heptachlore","name:heptachlore* et epoxyde d’heptachlore*","epoxyde d heptachlore"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":23,"names":["Heptachlor","Heptachlor (and its epoxide)"],"says":"23 rows share a parameter key with a longer name holding \"heptachlor epoxide\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"heptachlor epoxide\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":22,"offset":0,"returned":22,"next_offset":null,"rows":[{"id":"9df9f2322be9ee73","parameter":"Heptachlor Epoxide","value":"0.52","value_num":0.52,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:1024-57-3","place":["US-MD"],"conditions":["receiving_water is freshwater"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 6 (fresh water acute)","page":null,"quote":"Heptachlor Epoxide 1024573 0.52 0.0038 0.053 0.0036 0.00032 a 0.00032 a 0.0002"}},{"id":"8381bfeb02d87ee3","parameter":"Heptachlor Epoxide","value":"0.0038","value_num":0.0038,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:1024-57-3","place":["US-MD"],"conditions":["receiving_water is freshwater"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not 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Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 6 (salt water chronic)","page":null,"quote":"Heptachlor Epoxide 1024573 0.52 0.0038 0.053 0.0036 0.00032 a 0.00032 a 0.0002"}},{"id":"ca67ba07a8c1f568","parameter":"Heptachlor Epoxide","value":"0.00032 a","value_num":0.00032,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:1024-57-3","place":["US-MD"],"conditions":["human health for consumption of drinking water + organism (the table's column)"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 6 (human health, drinking water + organism)","page":null,"quote":"Heptachlor Epoxide 1024573 0.52 0.0038 0.053 0.0036 0.00032 a 0.00032 a 0.0002"}},{"id":"52948692beb1c35f","parameter":"Heptachlor Epoxide","value":"0.00032 a","value_num":0.00032,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:1024-57-3","place":["US-MD"],"conditions":["human health for consumption of organism only (the table's column)"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 6 (human health, organism only)","page":null,"quote":"Heptachlor Epoxide 1024573 0.52 0.0038 0.053 0.0036 0.00032 a 0.00032 a 0.0002"}},{"id":"b54539d3a430c4c1","parameter":"Heptachlor Epoxide","value":"0.0002","value_num":0.0002,"unit":"mg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:1024-57-3","place":["US-MD"],"conditions":["Public Water Supply designated waters only (the table's * note)"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 6 (drinking water MCL)","page":null,"quote":"Heptachlor Epoxide 1024573 0.52 0.0038 0.053 0.0036 0.00032 a 0.00032 a 0.0002"}},{"id":"d7d47dcf0fa5b574","parameter":"Heptachlor epoxide","value":"0.016","value_num":0.016,"unit":"mg/L","statistic":"composite","direction":"max","kind":"limit","medium":"product","level":"national","parameter_key":"cas:1024-57-3","place":["US"],"conditions":["(a) Table UTS identifies the hazardous constituents, along with the nonwastewater and wastewater treatment standard levels, that are used to regulate most prohibited hazardous wastes with numerical limits. For determining compliance with treatment standards for underlying hazardous constituents as defined in § 268.2(i), these treatment standards may not be exceeded. Compliance with these treatment standards is measured by an analysis of grab samples, unless otherwise noted in the following Table UTS."],"cite":{"instrument":"us_40cfr268_48","title":"40 CFR 268.48 — Universal treatment standards: Table UTS, wastewater and nonwastewater treatment standards for the hazardous constituents of land-disposal-restricted wastes","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR, 40 CFR 268.48 as of 2026-10-13 (title 40 up to date as of that day; source note: 59 FR 48103, Sept. 19, 1994, as last amended at 76 FR 34156, June 13, 2011)","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-13/title-40.xml?part=268&section=268.48","source_sha256":"70b2e58a6b1e228e2c204acc69b69fab0d5a0347e35d569959073c3dc3ee4adb","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 268.48, Table UTS, Organic Constituents, wastewater standard","page":null,"quote":"Heptachlor epoxide 1024-57-3 0.016 0.066"}},{"id":"730f5aa843bf5c2c","parameter":"Heptachlor epoxide","value":"0.066","value_num":0.066,"unit":"mg/kg","statistic":"instant","direction":"max","kind":"limit","medium":"product","level":"national","parameter_key":"cas:1024-57-3","place":["US"],"conditions":["(a) Table UTS identifies the hazardous constituents, along with the nonwastewater and wastewater treatment standard levels, that are used to regulate most prohibited hazardous wastes with numerical limits. For determining compliance with treatment standards for underlying hazardous constituents as defined in § 268.2(i), these treatment standards may not be exceeded. Compliance with these treatment standards is measured by an analysis of grab samples, unless otherwise noted in the following Table UTS."],"cite":{"instrument":"us_40cfr268_48","title":"40 CFR 268.48 — Universal treatment standards: Table UTS, wastewater and nonwastewater treatment standards for the hazardous constituents of land-disposal-restricted wastes","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR, 40 CFR 268.48 as of 2026-10-13 (title 40 up to date as of that day; source note: 59 FR 48103, Sept. 19, 1994, as last amended at 76 FR 34156, June 13, 2011)","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-13/title-40.xml?part=268&section=268.48","source_sha256":"70b2e58a6b1e228e2c204acc69b69fab0d5a0347e35d569959073c3dc3ee4adb","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 268.48, Table UTS, Organic Constituents, nonwastewater standard","page":null,"quote":"Heptachlor epoxide 1024-57-3 0.016 0.066"}},{"id":"04a4bccc832c3994","parameter":"Heptachlor epoxide","value":"0.0002","value_num":0.0002,"unit":"mg/l","direction":"max","kind":"limit","medium":"drinking_water","level":"national","parameter_key":"cas:1024-57-3","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":"141.61","page":null,"quote":null,"column":"mcl"}},{"id":"10f49ed5ec2ed0bf","parameter":"Heptachlor Epoxide","value":"0.52","value_num":0.52,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:1024-57-3","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"],"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":"Heptachlor Epoxide (P) 1024573 0.52 0.0038 0.053 0.0036 1981"}},{"id":"3f8e3ac9c2baa04f","parameter":"Heptachlor Epoxide","value":"0.0038","value_num":0.0038,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:1024-57-3","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 CCC (chronic): criterion continuous concentration, chronic"],"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":"Heptachlor Epoxide (P) 1024573 0.52 0.0038 0.053 0.0036 1981"}},{"id":"46b5d3664d801ddd","parameter":"Heptachlor Epoxide","value":"0.053","value_num":0.053,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:1024-57-3","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 marine","Saltwater CMC (acute): criterion maximum concentration, acute"],"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); 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