{"query":{"parameter":"silver","place":"US-IN","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-IN","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":11,"names":["Trichlorophenoxypropionic acid, -2,4,5","Chlorophenoxy Herbicide (2,4,5-TP) [Silvex]","Silvex/2,4,5-TP","2,4,5-TP (Silvex)"],"says":"11 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":455,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"2ee120b634110e84","parameter":"Silver (dissolved)","value":"WER (e(1.72[lnH]- 6.59)/2)(CF)","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","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')","hardness-dependent: the row's equation of the receiving water's hardness (the hardness used is at most 400 mg/l CaCO3, note [2])"],"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(a)(3) Table 6-1","page":8,"quote":null}},{"id":"106be8d044250d22","parameter":"Silver (dissolved)","value":"0.49","value_num":0.49,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","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')","hardness 50 mg/l CaCO3 (the table's row)"],"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(a)(5) Table 6-2","page":12,"quote":"50 30 1.2 260 29 0.49 – 65 66"}},{"id":"364dec7f8e738525","parameter":"Silver (dissolved)","value":"1.6","value_num":1.6,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","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')","hardness 100 mg/l CaCO3 (the table's row)"],"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(a)(5) Table 6-2","page":12,"quote":"100 65 2.5 470 52 1.6 – 120 120"}},{"id":"23b0d4a5cdb8fea0","parameter":"Silver (dissolved)","value":"3.2","value_num":3.2,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","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')","hardness 150 mg/l CaCO3 (the table's row)"],"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(a)(5) Table 6-2","page":12,"quote":"150 100 3.9 660 73 3.2 – 170 170"}},{"id":"6c331ddfb973a20f","parameter":"Silver (dissolved)","value":"5.3","value_num":5.3,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","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')","hardness 200 mg/l CaCO3 (the table's row)"],"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(a)(5) Table 6-2","page":12,"quote":"200 140 5.3 840 93 5.3 – 210 210"}},{"id":"22b6dc7cd08271c3","parameter":"Silver (dissolved)","value":"7.8","value_num":7.8,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","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')","hardness 250 mg/l CaCO3 (the table's row)"],"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(a)(5) Table 6-2","page":12,"quote":"250 170 6.7 1,000 110 7.8 – 250 260"}},{"id":"09a112184a46ae7f","parameter":"Silver (dissolved)","value":"11","value_num":11,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","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')","hardness 300 mg/l CaCO3 (the table's row)"],"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(a)(5) Table 6-2","page":12,"quote":"300 210 8.1 1,200 130 11 – 300 300"}},{"id":"3a4d7c7f40b8bce3","parameter":"Silver (dissolved)","value":"14","value_num":14,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","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')","hardness 350 mg/l CaCO3 (the table's row)"],"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(a)(5) Table 6-2","page":12,"quote":"350 240 9.5 1,400 150 14 – 340 340"}},{"id":"93aba677015468cd","parameter":"Silver (dissolved)","value":"17","value_num":17,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-22-4","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')","hardness 400 mg/l CaCO3 or above (the criteria at 400 are used above 400)"],"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(a)(5) Table 6-2","page":12,"quote":"400 280 11 1,500 170 17 – 380 380"}},{"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":"fd7c1002376532a0","parameter":"Silver","value":"0.43","value_num":0.43,"unit":"mg/L","statistic":"composite","direction":"max","kind":"limit","medium":"product","level":"national","parameter_key":"cas:7440-22-4","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":"Silver 7440-22-4 0.43 0.14 mg/l TCLP"}},{"id":"63ff1b338ab2aea9","parameter":"Silver","value":"0.14 mg/l TCLP","value_num":0.14,"unit":"mg/L TCLP","statistic":"instant","direction":"max","kind":"limit","medium":"leachate","level":"national","parameter_key":"cas:7440-22-4","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":"Silver 7440-22-4 0.43 0.14 mg/l TCLP"}},{"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 m-Operation","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":"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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0.164 0.068"}},{"id":"01807f84ca347258","parameter":"Silver","value":"0.068","value_num":0.068,"unit":"mg/troy ounce of silver reduced in solution","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)","(b) Silver chloride reduction spent solution.","table: BPT Limitations for the Primary Precious Metals and Mercury 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 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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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Limitations for the Primary Precious Metals and Mercury 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 5.658 2.346"}},{"id":"88f2fca02dd0fa2a","parameter":"Silver","value":"0.574","value_num":0.574,"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 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condensed","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)","(i) Mercury cleaning bath water.","table: BPT Limitations for the Primary Precious Metals and Mercury 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 0.574 0.238"}},{"id":"526b5671affae838","parameter":"Silver","value":"0.377","value_num":0.377,"unit":"mg/troy ounce of gold and silver smelted","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 (BAT)","(a) Smelter wet air pollution control.","table: BAT Limitations for the Primary Precious Metals and Mercury 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 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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 421.253 (BAT)","page":null,"quote":"Silver 0.377 0.156"}},{"id":"721dcd982c8d9bc4","parameter":"Silver","value":"0.116","value_num":0.116,"unit":"mg/troy ounce of silver reduced in solution","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 (BAT)","(b) Silver chloride reduction spent solution.","table: BAT Limitations for the Primary Precious Metals and Mercury 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 421.253 (BAT)","page":null,"quote":"Silver 0.116 0.048"}},{"id":"31ee3c39586cad88","parameter":"Silver","value":"0.048","value_num":0.048,"unit":"mg/troy ounce of silver reduced in solution","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 (BAT)","(b) Silver chloride reduction spent solution.","table: BAT Limitations for the Primary Precious Metals and Mercury 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 421.253 (BAT)","page":null,"quote":"Silver 0.116 0.048"}},{"id":"449e44bee900efcf","parameter":"Silver","value":"5.742","value_num":5.742,"unit":"mg/troy ounce of gold refined electrolytically","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 (BAT)","(c) Electrolytic cells wet air pollution control.","table: BAT Limitations for the Primary Precious Metals and Mercury 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 421.253 (BAT)","page":null,"quote":"Silver 5.742 2.376"}},{"id":"628f5fb7ec28c64e","parameter":"Silver","value":"2.376","value_num":2.376,"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 (BAT)","(c) Electrolytic cells wet air pollution control.","table: BAT Limitations for the Primary Precious Metals and Mercury 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 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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 421.253 (BAT)","page":null,"quote":"Silver 0.015 0.006"}},{"id":"a9015423875ee1f8","parameter":"Silver","value":"0.006","value_num":0.006,"unit":"mg/troy ounce of silver in electrolyte produced","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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6.380 2.640"}},{"id":"79a69672db7fe06f","parameter":"Silver","value":"2.640","value_num":2.64,"unit":"mg/kg (pounds per million pounds) of mercury condensed","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 (BAT)","(e) Calciner Wet Air Pollution Control.","table: BAT Limitations for the Primary Precious Metals and Mercury 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 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Limitations for the Primary Precious Metals and Mercury 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 421.253 (BAT)","page":null,"quote":"Silver 5.104 2.112"}}],"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: \"silver\", value, unit}, ...], any other parameters 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