{"query":{"parameter":"silver","place":"US-UT","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-UT","US"],"parameter_keys":["cas:7440-22-4","cas:93-72-1","cas:506-61-6","name:silver-108m","name:silver-110m","name:silver-111","cas:506-64-9","name:silver - total","name:silver, total","name:silver, total recoverable","name:total silver"],"names_matched":[["silver","cas:7440-22-4"],["2 4 5 tp silver","cas:93-72-1"],["potassium silver cyanide","cas:506-61-6"],["silver 108m","name:silver-108m"],["silver 110m","name:silver-110m"],["silver 111","name:silver-111"],["silver cyanide","cas:506-64-9"],["silver cyanide ag cn","cas:506-64-9"],["silver total","name:silver - total"],["silver total","name:silver, total"],["silver total recoverable","name:silver, total recoverable"],["total silver","name:total silver"],["total silver freshwater","name:total silver"],["total silver marine","name:total silver"],["plata total","name:total silver","plata"]],"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","not_sent":{"rows":9,"names":["Trichlorophenoxypropionic acid, -2,4,5","Chlorophenoxy Herbicide (2,4,5-TP) [Silvex]","2,4,5-TP (Silvex)"],"says":"9 rows share a parameter key with a longer name holding \"silver\" 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":448,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"39c74b3a9925fd4a","parameter":"Silver","value":"3.2","value_num":3.2,"unit":"µg/L","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","place":["US-UT"],"conditions":["receiving_water is freshwater","water with the beneficial use Class 3A: cold water species of game fish and other cold water aquatic life (R317-2-6; uses by water in R317-2-13)","hardness 100 mg/L (Table 2.14.2 note 7: hardness dependent criteria, 100 mg/l used; Table 2.14.3 equations otherwise)"],"cite":{"instrument":"us_ut_wqs","title":"Utah Admin. Code R317-2-14 numeric criteria: Table 2.14.2 aquatic wildlife (Classes 3A-3D, 5) and Table 2.14.6 human health","issuer":"State of Utah, Department of Environmental Quality, Division of Water Quality (Water Quality Board)","edition":"R317-2 Standards of Quality for Waters of the State as US EPA posts it (Utah DEQ's Word file, PDF of September 24, 2025)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/utwqs.pdf","source_sha256":"ecd9919716fba76ef049e55c942f1387f9a8ec133cd140000105b0554af46a38","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Utah Admin. Code R317-2-14 Table 2.14.2","page":39,"quote":"Silver 1 Hour Average (7) 3.2 3.2 3.2 3.2"}},{"id":"fa92ce9ca13c6a94","parameter":"Silver","value":"3.2","value_num":3.2,"unit":"µg/L","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","place":["US-UT"],"conditions":["receiving_water is freshwater","water with the beneficial use Class 3B: warm water species of game fish and other warm water aquatic life (R317-2-6; uses by water in R317-2-13)","hardness 100 mg/L (Table 2.14.2 note 7: hardness dependent criteria, 100 mg/l used; Table 2.14.3 equations otherwise)"],"cite":{"instrument":"us_ut_wqs","title":"Utah Admin. Code R317-2-14 numeric criteria: Table 2.14.2 aquatic wildlife (Classes 3A-3D, 5) and Table 2.14.6 human health","issuer":"State of Utah, Department of Environmental Quality, Division of Water Quality (Water Quality Board)","edition":"R317-2 Standards of Quality for Waters of the State as US EPA posts it (Utah DEQ's Word file, PDF of September 24, 2025)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/utwqs.pdf","source_sha256":"ecd9919716fba76ef049e55c942f1387f9a8ec133cd140000105b0554af46a38","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Utah Admin. Code R317-2-14 Table 2.14.2","page":39,"quote":"Silver 1 Hour Average (7) 3.2 3.2 3.2 3.2"}},{"id":"6b6e2594b061c02a","parameter":"Silver","value":"3.2","value_num":3.2,"unit":"µg/L","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","place":["US-UT"],"conditions":["receiving_water is freshwater","water with the beneficial use Class 3C: nongame fish and other aquatic life (R317-2-6; uses by water in R317-2-13)","hardness 100 mg/L (Table 2.14.2 note 7: hardness dependent criteria, 100 mg/l used; Table 2.14.3 equations otherwise)"],"cite":{"instrument":"us_ut_wqs","title":"Utah Admin. Code R317-2-14 numeric criteria: Table 2.14.2 aquatic wildlife (Classes 3A-3D, 5) and Table 2.14.6 human health","issuer":"State of Utah, Department of Environmental Quality, Division of Water Quality (Water Quality Board)","edition":"R317-2 Standards of Quality for Waters of the State as US EPA posts it (Utah DEQ's Word file, PDF of September 24, 2025)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/utwqs.pdf","source_sha256":"ecd9919716fba76ef049e55c942f1387f9a8ec133cd140000105b0554af46a38","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Utah Admin. Code R317-2-14 Table 2.14.2","page":39,"quote":"Silver 1 Hour Average (7) 3.2 3.2 3.2 3.2"}},{"id":"f67777eadb8448de","parameter":"Silver","value":"3.2","value_num":3.2,"unit":"µg/L","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","place":["US-UT"],"conditions":["receiving_water is freshwater","water with the beneficial use Class 3D: waterfowl, shore birds and other water-oriented wildlife (R317-2-6; uses by water in R317-2-13)","hardness 100 mg/L (Table 2.14.2 note 7: hardness dependent criteria, 100 mg/l used; Table 2.14.3 equations otherwise)"],"cite":{"instrument":"us_ut_wqs","title":"Utah Admin. Code R317-2-14 numeric criteria: Table 2.14.2 aquatic wildlife (Classes 3A-3D, 5) and Table 2.14.6 human health","issuer":"State of Utah, Department of Environmental Quality, Division of Water Quality (Water Quality Board)","edition":"R317-2 Standards of Quality for Waters of the State as US EPA posts it (Utah DEQ's Word file, PDF of September 24, 2025)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/utwqs.pdf","source_sha256":"ecd9919716fba76ef049e55c942f1387f9a8ec133cd140000105b0554af46a38","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Utah Admin. Code R317-2-14 Table 2.14.2","page":39,"quote":"Silver 1 Hour Average (7) 3.2 3.2 3.2 3.2"}},{"id":"fc3a9e37c51807d0","parameter":"Silver","value":"5.0","value_num":5,"unit":"mg/L","direction":"max","kind":"threshold","medium":"leachate","level":"national","parameter_key":"cas:7440-22-4","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":"D011 Silver 7440-22-4 5.0"}},{"id":"d59ca9cffa240308","parameter":"Ag","value":"1.2","value_num":1.2,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7440-22-4","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart B—Electroplating of Precious Metals Subcategory","existing sources (PSES)","(c) For plants discharging 38,000 liters (10,000 gal) or more per calendar day of electroplating process wastewater the following limitations shall apply:","table: Subpart B—Precious Metals Facilities Discharging 38,000 Liters or More Per Day PSES Limitations (mg/l)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.24 (PSES)","page":null,"quote":"Ag 1.2 0.7"}},{"id":"16d95930ac34512e","parameter":"Ag","value":"0.7","value_num":0.7,"unit":"mg/L","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7440-22-4","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart B—Electroplating of Precious Metals Subcategory","existing sources (PSES)","(c) For plants discharging 38,000 liters (10,000 gal) or more per calendar day of electroplating process wastewater the following limitations shall apply:","table: Subpart B—Precious Metals Facilities Discharging 38,000 Liters or More Per Day PSES Limitations (mg/l)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.24 (PSES)","page":null,"quote":"Ag 1.2 0.7"}},{"id":"fa9ff27d054253b2","parameter":"Ag","value":"47","value_num":47,"unit":"mg/sq m-Operation","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7440-22-4","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart B—Electroplating of Precious Metals Subcategory","existing sources (PSES)","(d) Alternatively, the following mass-based standards are equivalent to and may apply in place of those limitations specified under paragraph (c) of this section upon prior agreement between a source subject to these standards and the publicly owned treatment works receiving such regulated wastes:","table: Subpart B—Precious Metals Facilities Discharging 38,000 Liters or More Per Day PSES Limitations (mg/sq m-Operation)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.24 (PSES)","page":null,"quote":"Ag 47 29"}},{"id":"dff57f98eaf0a460","parameter":"Ag","value":"29","value_num":29,"unit":"mg/sq 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2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.24 (PSES)","page":null,"quote":"Ag 47 29"}},{"id":"531e7c287de9c099","parameter":"Silver","value":"0.0090","value_num":0.009,"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:7440-22-4","place":["US"],"conditions":["route is direct","cites is 40 CFR 415","the discharge is of the Subpart BA—Silver Nitrate Production Subcategory","existing sources (BPT)","table: Subpart BA—Silver Nitrate"],"cite":{"instrument":"us_40cfr415","title":"40 CFR Part 415 — PART 415—INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection 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Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.252 (BPT)","page":null,"quote":"Silver 0.533 0.221"}},{"id":"5a52c94e4b7ab554","parameter":"Silver","value":"0.221","value_num":0.221,"unit":"mg/troy ounce of gold and silver smelted","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-22-4","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart W—Primary Precious Metals and Mercury 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CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.252 (BPT)","page":null,"quote":"Silver 81.180 33.660"}},{"id":"942f2634ca3fd2c8","parameter":"Silver","value":"33.660","value_num":33.66,"unit":"mg/troy ounce of gold refined electrolytically","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-22-4","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart W—Primary Precious Metals and Mercury Subcategory","existing sources (BPT)","(c) Electrolytic cells wet 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CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.252 (BPT)","page":null,"quote":"Silver 76.340 31.650"}},{"id":"204cb32b3b2d81b3","parameter":"Silver","value":"7.216","value_num":7.216,"unit":"mg/kg (pounds per million pounds) of mercury condensed","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-22-4","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart W—Primary Precious Metals and Mercury Subcategory","existing sources (BPT)","(f) Calcine quench 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