{"query":{"parameter":"selenium","place":"US-AK","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-AK","US"],"parameter_keys":["cas:7782-49-2","cas:7783-00-8","name:selenium-75","name:selenium, dissolved","name:selenium, fish egg or ovary tissue","name:selenium, fish muscle tissue","name:selenium, fish whole body tissue","cas:7446-34-6","name:selenium, total","name:selenium - total alert concentration","name:selenium - total guideline","name:selenium v","name:total selenium","name:total selenium [freshwater – for flowing (lotic) waters]","name:total selenium [freshwater – for still/standing (lentic) waters]"],"names_matched":[["selenium","cas:7782-49-2"],["selenious acid as selenium","cas:7783-00-8"],["selenium 75","name:selenium-75"],["selenium dissolved","name:selenium, dissolved"],["selenium fish egg or ovary tissue","name:selenium, fish egg or ovary tissue"],["selenium fish muscle tissue","name:selenium, fish muscle tissue"],["selenium fish whole body tissue","name:selenium, fish whole body tissue"],["selenium monosulfide","cas:7446-34-6"],["selenium sulfide","cas:7446-34-6"],["selenium total","name:selenium, total"],["selenium total alert concentration","name:selenium - total alert concentration"],["selenium total guideline","name:selenium - total guideline"],["selenium v","name:selenium v"],["total selenium","name:total selenium"],["total selenium freshwater for flowing lotic waters","name:total selenium [freshwater – for flowing (lotic) waters]"],["total selenium freshwater for still standing lentic waters","name:total selenium [freshwater – for still/standing (lentic) waters]"],["total selenium marine","name:total selenium"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":3,"names":["Selenious Acid"],"says":"3 rows share a parameter key with a longer name holding \"selenium\" 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":106,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"4c177c964b5d1c6b","parameter":"Selenium","value":"50","value_num":50,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7782-49-2","place":["US-AK"],"conditions":["fresh water designated for water supply: drinking, culinary and food processing (18 AAC 70.020(b))"],"cite":{"instrument":"us_ak_wqs","title":"Alaska Water Quality Criteria Manual for Toxic and Other Deleterious Organic and Inorganic Substances (fresh and marine aquatic life, human health, water supply), with 18 AAC 70.020(b) dissolved inorganic substances and marine salinity","issuer":"State of Alaska, Department of Environmental Conservation","edition":"Toxics Manual as amended through September 8, 2022, adopted by reference in 18 AAC 70, as US EPA posts it in effect for CWA purposes (effective April 14, 2023; cover April 24, 2023); 18 AAC 70 as EPA posts it effective January 8, 2026 (rows from it name their own source)","source_url":"https://www.epa.gov/system/files/documents/2023-05/akwqs-toxics-manual.pdf","source_sha256":"c835973dac59a2b48a376b34d11333eba7ff7a0f024cee0864e42470a2283b37","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Alaska Toxics Manual (2022), Table of criteria","page":27,"quote":null}},{"id":"ece9ba5996a211a6","parameter":"Selenium","value":"10","value_num":10,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7782-49-2","place":["US-AK"],"conditions":["fresh water designated for water supply: agriculture, stock watering (18 AAC 70.020(b))"],"cite":{"instrument":"us_ak_wqs","title":"Alaska Water Quality Criteria Manual for Toxic and Other Deleterious Organic and Inorganic Substances (fresh and marine aquatic life, human health, water supply), with 18 AAC 70.020(b) dissolved inorganic substances and marine salinity","issuer":"State of Alaska, Department of Environmental Conservation","edition":"Toxics Manual as amended through September 8, 2022, adopted by reference in 18 AAC 70, as US EPA posts it in effect for CWA purposes (effective April 14, 2023; cover April 24, 2023); 18 AAC 70 as EPA posts it effective January 8, 2026 (rows from it name their own source)","source_url":"https://www.epa.gov/system/files/documents/2023-05/akwqs-toxics-manual.pdf","source_sha256":"c835973dac59a2b48a376b34d11333eba7ff7a0f024cee0864e42470a2283b37","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Alaska Toxics Manual (2022), Table of criteria","page":27,"quote":null}},{"id":"f4dc22e87635381d","parameter":"Selenium","value":"20","value_num":20,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7782-49-2","place":["US-AK"],"conditions":["fresh water designated for water supply: agriculture, irrigation (18 AAC 70.020(b))"],"cite":{"instrument":"us_ak_wqs","title":"Alaska Water Quality Criteria Manual for Toxic and Other Deleterious Organic and Inorganic Substances (fresh and marine aquatic life, human health, water supply), with 18 AAC 70.020(b) dissolved inorganic substances and marine salinity","issuer":"State of Alaska, Department of Environmental Conservation","edition":"Toxics Manual as amended through September 8, 2022, adopted by reference in 18 AAC 70, as US EPA posts it in effect for CWA purposes (effective April 14, 2023; cover April 24, 2023); 18 AAC 70 as EPA posts it effective January 8, 2026 (rows from it name their own source)","source_url":"https://www.epa.gov/system/files/documents/2023-05/akwqs-toxics-manual.pdf","source_sha256":"c835973dac59a2b48a376b34d11333eba7ff7a0f024cee0864e42470a2283b37","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Alaska Toxics Manual (2022), Table of criteria","page":27,"quote":null}},{"id":"7296ada0416cb1ce","parameter":"Selenium","value":"See Note 62 (1-hr avg) 11 total recoverable 63, 64","unit":"µg/L","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7782-49-2","place":["US-AK"],"conditions":["receiving_water is freshwater","fresh water designated for growth and propagation of fish, shellfish, other aquatic life, and wildlife (fresh: salinity 1 ppt or less, 95th percentile; 18 AAC 70.990(80))","EPA has not acted on Alaska's new freshwater selenium criteria: for CWA purposes the acute criterion is 20 µg/l total recoverable (EPA's cover)","the equation of note 62 (fractions of selenium as selenite and selenate)"],"cite":{"instrument":"us_ak_wqs","title":"Alaska Water Quality Criteria Manual for Toxic and Other Deleterious Organic and Inorganic Substances (fresh and marine aquatic life, human health, water supply), with 18 AAC 70.020(b) dissolved inorganic substances and marine salinity","issuer":"State of Alaska, Department of Environmental Conservation","edition":"Toxics Manual as amended through September 8, 2022, adopted by reference in 18 AAC 70, as US EPA posts it in effect for CWA purposes (effective April 14, 2023; cover April 24, 2023); 18 AAC 70 as EPA posts it effective January 8, 2026 (rows from it name their own source)","source_url":"https://www.epa.gov/system/files/documents/2023-05/akwqs-toxics-manual.pdf","source_sha256":"c835973dac59a2b48a376b34d11333eba7ff7a0f024cee0864e42470a2283b37","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Alaska Toxics Manual (2022), Table of criteria","page":27,"quote":null}},{"id":"6ab6ae89c8c4969e","parameter":"Selenium","value":"5.0 (4-day avg) 12 total recoverable 64","value_num":5,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7782-49-2","place":["US-AK"],"conditions":["receiving_water is freshwater","fresh water designated for growth and propagation of fish, shellfish, other aquatic life, and wildlife (fresh: salinity 1 ppt or less, 95th percentile; 18 AAC 70.990(80))"],"cite":{"instrument":"us_ak_wqs","title":"Alaska Water Quality Criteria Manual for Toxic and Other Deleterious Organic and Inorganic Substances (fresh and marine aquatic life, human health, water supply), with 18 AAC 70.020(b) dissolved inorganic substances and marine salinity","issuer":"State of Alaska, Department of Environmental Conservation","edition":"Toxics Manual as amended through September 8, 2022, adopted by reference in 18 AAC 70, as US EPA posts it in effect for CWA purposes (effective April 14, 2023; cover April 24, 2023); 18 AAC 70 as EPA posts it effective January 8, 2026 (rows from it name their own source)","source_url":"https://www.epa.gov/system/files/documents/2023-05/akwqs-toxics-manual.pdf","source_sha256":"c835973dac59a2b48a376b34d11333eba7ff7a0f024cee0864e42470a2283b37","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Alaska Toxics Manual (2022), Table of criteria","page":27,"quote":null}},{"id":"cf9ddae7cd18d257","parameter":"Selenium","value":"290 See Appendix B (1-hr avg) 11 dissolved 41, 65, 66","value_num":290,"unit":"µg/L","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7782-49-2","place":["US-AK"],"conditions":["receiving_water is marine","marine water designated for growth and propagation of fish, shellfish, other aquatic life, and wildlife (marine: salinity 10 ppt or more, 95th percentile; 18 AAC 70.990(81))"],"cite":{"instrument":"us_ak_wqs","title":"Alaska Water Quality Criteria Manual for Toxic and Other Deleterious Organic and Inorganic Substances (fresh and marine aquatic life, human health, water supply), with 18 AAC 70.020(b) dissolved inorganic substances and marine salinity","issuer":"State of Alaska, Department of Environmental Conservation","edition":"Toxics Manual as amended through September 8, 2022, adopted by reference in 18 AAC 70, as US EPA posts it in effect for CWA purposes (effective April 14, 2023; cover April 24, 2023); 18 AAC 70 as EPA posts it effective January 8, 2026 (rows from it name their own source)","source_url":"https://www.epa.gov/system/files/documents/2023-05/akwqs-toxics-manual.pdf","source_sha256":"c835973dac59a2b48a376b34d11333eba7ff7a0f024cee0864e42470a2283b37","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Alaska Toxics Manual (2022), Table of criteria","page":27,"quote":null}},{"id":"c28a1c8a2aa60e09","parameter":"Selenium","value":"71 See Appendix B (4-day avg) 12 dissolved 41, 65, 67","value_num":71,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7782-49-2","place":["US-AK"],"conditions":["receiving_water is marine","marine water designated for growth and propagation of fish, shellfish, other aquatic life, and wildlife (marine: salinity 10 ppt or more, 95th percentile; 18 AAC 70.990(81))"],"cite":{"instrument":"us_ak_wqs","title":"Alaska Water Quality Criteria Manual for Toxic and Other Deleterious Organic and Inorganic Substances (fresh and marine aquatic life, human health, water supply), with 18 AAC 70.020(b) dissolved inorganic substances and marine salinity","issuer":"State of Alaska, Department of Environmental Conservation","edition":"Toxics Manual as amended through September 8, 2022, adopted by reference in 18 AAC 70, as US EPA posts it in effect for CWA purposes (effective April 14, 2023; 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cover April 24, 2023); 18 AAC 70 as EPA posts it effective January 8, 2026 (rows from it name their own source)","source_url":"https://www.epa.gov/system/files/documents/2023-05/akwqs-toxics-manual.pdf","source_sha256":"c835973dac59a2b48a376b34d11333eba7ff7a0f024cee0864e42470a2283b37","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"EPA's cover to the posted Alaska Toxics Manual","page":2,"quote":"New Selenium Numeric Freshwater Aquatic Life Criteria EPA has not yet taken action on revised criteria. A CMC of 20 ug/l and a CCC of 5 ug/l (both o expressed as total recoverable metal) are applicable for purposes of the CWA."}},{"id":"4ce7c3a5c7c206db","parameter":"Selenium","value":"1.0","value_num":1,"unit":"mg/L","direction":"max","kind":"threshold","medium":"leachate","level":"national","parameter_key":"cas:7782-49-2","place":["US"],"conditions":["(a) A solid waste (except manufactured gas plant waste) exhibits the characteristic of toxicity if, using the Toxicity Characteristic Leaching Procedure, test Method 1311 in “Test Methods for Evaluating Solid Waste, Physical/Chemical Methods,” EPA Publication SW-846, as incorporated by reference in § 260.11 of this chapter, the extract from a representative sample of the waste contains any of the contaminants listed in table 1 at the concentration equal to or greater than the respective value given in that table. Where the waste contains less than 0.5 percent filterable solids, the waste itself, after filtering using the methodology outlined in Method 1311, is considered to be the extract for the purpose of this section."],"cite":{"instrument":"us_40cfr261_24","title":"40 CFR 261.24 — Toxicity characteristic: Table 1, maximum concentration of contaminants for the toxicity characteristic (TCLP regulatory levels)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR, 40 CFR 261.24 as of 2026-10-13 (title 40 up to date as of that day)","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-13/title-40.xml?part=261&section=261.24","source_sha256":"3a1ec9b0d3051c70e471e359275657b0fa6d98e80927d2217e82b2dbbca60961","fetched_at":"2026-10-15","section":"40 CFR 261.24, Table 1","page":null,"quote":"D010 Selenium 7782-49-2 1.0"}},{"id":"a776047018b35dd0","parameter":"Selenium","value":"0.82","value_num":0.82,"unit":"mg/L","statistic":"composite","direction":"max","kind":"limit","medium":"product","level":"national","parameter_key":"cas:7782-49-2","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","section":"40 CFR 268.48, Table UTS, Inorganic Constituents, wastewater standard","page":null,"quote":"Selenium 7 7782-49-2 0.82 5.7 mg/l TCLP"}},{"id":"094732a9ac944067","parameter":"Selenium","value":"5.7 mg/l TCLP","value_num":5.7,"unit":"mg/L TCLP","statistic":"instant","direction":"max","kind":"limit","medium":"leachate","level":"national","parameter_key":"cas:7782-49-2","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","section":"40 CFR 268.48, Table UTS, Inorganic Constituents, nonwastewater standard","page":null,"quote":"Selenium 7 7782-49-2 0.82 5.7 mg/l TCLP"}},{"id":"cb845ee83a2ef2cf","parameter":"Selenium (T)","value":"0.0015","value_num":0.0015,"unit":"Kg/kkg (or pounds per/1,000 lb) of product","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7782-49-2","place":["US"],"conditions":["route is direct","cites is 40 CFR 415","the discharge is of the Subpart AJ—Copper Salts Production Subcategory","existing sources (BPT)","table: Subpart AJ—Copper Sulfate, Copper Chloride, Copper Iodide, Copper Nitrate"],"cite":{"instrument":"us_40cfr415","title":"40 CFR Part 415 — PART 415—INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=415","source_sha256":"ebf67428a51e85f12785b92d537e6878c5f9838c87722ac2db82b3db673d1e23","fetched_at":"2026-09-24","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 415.362 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