{"query":{"parameter":"chromium","place":"US-VA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-VA","US"],"parameter_keys":["cas:7440-47-3","cas:16065-83-1","name:chromium (+3)","name:chromium +3, total","name:chromium-51","cas:18540-29-9","name:chromium (+6)","name:chromium +6","name:chromium +6, total","name:chromium ii iii","name:chromium total","name:chromium, total","name:chromium (vi) (freshwater) chromium (vi) marine","cas:92203-02-6","name:total chromium","name:cromo totale","name:chrome total"],"names_matched":[["chromium","cas:7440-47-3"],["chromium 3","cas:16065-83-1"],["chromium 3","name:chromium (+3)"],["chromium 3 total","name:chromium +3, total"],["chromium 3 total recoverable","name:chromium (+3)"],["chromium 51","name:chromium-51"],["chromium 6","cas:18540-29-9"],["chromium 6","name:chromium (+6)"],["chromium 6","name:chromium +6"],["chromium 6 total","name:chromium +6, total"],["chromium 6 total recoverable","name:chromium (+6)"],["chromium and chromium compounds metallic divalent and trivalent","name:chromium ii iii"],["chromium compounds hexavalent","cas:18540-29-9"],["chromium hex","cas:18540-29-9"],["chromium hex dissolved","cas:18540-29-9"],["chromium hexavalent","cas:18540-29-9"],["chromium hexavalent cr vi","cas:18540-29-9"],["chromium hexavalent dissolved","cas:18540-29-9"],["chromium hexavalent total","cas:18540-29-9"],["chromium ii iii","name:chromium ii iii"],["chromium iii","cas:16065-83-1"],["chromium iii dissolved","cas:16065-83-1"],["chromium iii insoluble salts","cas:16065-83-1"],["chromium iii soluble compounds","cas:16065-83-1"],["chromium iii total","cas:16065-83-1"],["chromium iii total recoverable","cas:16065-83-1"],["chromium total","name:chromium total"],["chromium total","name:chromium, total"],["chromium total hexavalent cr vi","cas:18540-29-9"],["chromium total trivalent cr iii","cas:16065-83-1"],["chromium tri","cas:16065-83-1"],["chromium trivalent","cas:16065-83-1"],["chromium trivalent cr iii","cas:16065-83-1"],["chromium trivalent dissolved","cas:16065-83-1"],["chromium vi","cas:18540-29-9"],["chromium vi and compounds 1 12","cas:18540-29-9"],["chromium vi and compounds 1 13","cas:18540-29-9"],["chromium vi dissolved","cas:18540-29-9"],["chromium vi freshwater chromium vi marine","name:chromium (vi) (freshwater) chromium (vi) marine"],["chromium vi total","cas:18540-29-9"],["chromium vi total recoverable","cas:18540-29-9"],["hexavalent chromium","cas:18540-29-9"],["phosphoric acid reaction products with aluminum hydroxide and chromium oxide cro3","cas:92203-02-6"],["total chromium","name:total chromium"],["total chromium total recoverable","name:total chromium"],["chrom vi","cas:18540-29-9","chrom"],["cromo esavalente","cas:18540-29-9","cromo"],["cromo hexavalente","cas:18540-29-9","cromo"],["cromo total","name:total chromium","cromo"],["cromo totale","name:cromo totale","cromo"],["cromo trivalente","cas:16065-83-1","cromo"],["cromo vi","cas:18540-29-9","cromo"],["chrome composes de chrome hexavalent","cas:18540-29-9","chrome"],["chrome composes de chrome trivalent","cas:16065-83-1","chrome"],["chrome hexavalent et composes en cr 6","cas:18540-29-9","chrome"],["chrome iii cr iii","cas:16065-83-1","chrome"],["chrome total","name:chrome total","chrome"],["chrome total cr","name:chrome total","chrome"],["chrome vi cr vi","cas:18540-29-9","chrome"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":2705,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"047f6eb2d5256b32","parameter":"Chromium","value":"570 (CaCO 3 = 100)","value_num":570,"statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-47-3","place":["US-VA"],"conditions":["receiving_water is freshwater","Class II tidal freshwater and Classes III-VII (9VAC25-260-140 C); in a Class II transition zone the more stringent of the freshwater and saltwater criteria","total hardness 100 mg/L as CaCO3: the table's example value; the criterion is the hardness equation the row prints"],"cite":{"instrument":"us_va_wqs","title":"9VAC25-260-140 — Criteria for surface water (Virginia Water Quality Standards), Table of Parameters","issuer":"Commonwealth of Virginia, State Water Control Board (Department of Environmental Quality)","edition":"Virginia Administrative Code as served by the General Assembly's LIS on 2026-10-09; last amended Virginia Register Volume 40, Issue 24, eff. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"9VAC25-260-140 B, Table of Parameters (freshwater acute)","page":null,"quote":"Chromium III (µg/l) 5 16065831 Freshwater values are a function of total hardness as calcium carbonate CaCO 3 mg/l and the WER. The minimum hardness allowed for use in the equation below shall be 25 and the maximum hardness shall be 400 even when the actual ambient hardness is less than 25 or greater than 400. Freshwater acute criterion µg/l WER [e {0.8190[ln(hardness)]+3.7256} ] (CF a ) Freshwater chronic criterion µg/l WER [e {0.8190[ln(hardness)]+0.6848} ] (CF c ) WER = Water Effect Ratio = 1 unless determined otherwise under 9VAC25-260-140 .F e = natural antilogarithm ln = natural logarithm CF = conversion factor a (acute) or c (chronic) CF a = 0.316 CF c =0.860 570 (CaCO 3 = 100) 74 (CaCO 3 = 100) 100 (total Cr)"}},{"id":"f564880116d35418","parameter":"Chromium","value":"74 (CaCO 3 = 100)","value_num":74,"statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-47-3","place":["US-VA"],"conditions":["receiving_water is freshwater","Class II tidal freshwater and Classes III-VII (9VAC25-260-140 C); in a Class II transition zone the more stringent of the freshwater and saltwater criteria","total hardness 100 mg/L as CaCO3: the table's example value; the criterion is the hardness equation the row prints"],"cite":{"instrument":"us_va_wqs","title":"9VAC25-260-140 — Criteria for surface water (Virginia Water Quality Standards), Table of Parameters","issuer":"Commonwealth of Virginia, State Water Control Board (Department of Environmental Quality)","edition":"Virginia Administrative Code as served by the General Assembly's LIS on 2026-10-09; last amended Virginia Register Volume 40, Issue 24, eff. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"9VAC25-260-140 B, Table of Parameters (freshwater chronic)","page":null,"quote":"Chromium III (µg/l) 5 16065831 Freshwater values are a function of total hardness as calcium carbonate CaCO 3 mg/l and the WER. The minimum hardness allowed for use in the equation below shall be 25 and the maximum hardness shall be 400 even when the actual ambient hardness is less than 25 or greater than 400. Freshwater acute criterion µg/l WER [e {0.8190[ln(hardness)]+3.7256} ] (CF a ) Freshwater chronic criterion µg/l WER [e {0.8190[ln(hardness)]+0.6848} ] (CF c ) WER = Water Effect Ratio = 1 unless determined otherwise under 9VAC25-260-140 .F e = natural antilogarithm ln = natural logarithm CF = conversion factor a (acute) or c (chronic) CF a = 0.316 CF c =0.860 570 (CaCO 3 = 100) 74 (CaCO 3 = 100) 100 (total Cr)"}},{"id":"755f10f7bb53872e","parameter":"Chromium","value":"100 (total Cr)","value_num":100,"direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-47-3","place":["US-VA"],"conditions":["segments designated PWS (public water supply) in 9VAC25-260-390 through 9VAC25-260-540"],"cite":{"instrument":"us_va_wqs","title":"9VAC25-260-140 — Criteria for surface water (Virginia Water Quality Standards), Table of Parameters","issuer":"Commonwealth of Virginia, State Water Control Board (Department of Environmental Quality)","edition":"Virginia Administrative Code as served by the General Assembly's LIS on 2026-10-09; last amended Virginia Register Volume 40, Issue 24, eff. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"9VAC25-260-140 B, Table of Parameters (human health, public water supply)","page":null,"quote":"Chromium III (µg/l) 5 16065831 Freshwater values are a function of total hardness as calcium carbonate CaCO 3 mg/l and the WER. The minimum hardness allowed for use in the equation below shall be 25 and the maximum hardness shall be 400 even when the actual ambient hardness is less than 25 or greater than 400. Freshwater acute criterion µg/l WER [e {0.8190[ln(hardness)]+3.7256} ] (CF a ) Freshwater chronic criterion µg/l WER [e {0.8190[ln(hardness)]+0.6848} ] (CF c ) WER = Water Effect Ratio = 1 unless determined otherwise under 9VAC25-260-140 .F e = natural antilogarithm ln = natural logarithm CF = conversion factor a (acute) or c (chronic) CF a = 0.316 CF c =0.860 570 (CaCO 3 = 100) 74 (CaCO 3 = 100) 100 (total Cr)"}},{"id":"116ebf74089279d1","parameter":"Chromium","value":"16","value_num":16,"statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-47-3","place":["US-VA"],"conditions":["receiving_water is freshwater","Class II tidal freshwater and Classes III-VII (9VAC25-260-140 C); in a Class II transition zone the more stringent of the freshwater and saltwater criteria"],"cite":{"instrument":"us_va_wqs","title":"9VAC25-260-140 — Criteria for surface water (Virginia Water Quality Standards), Table of Parameters","issuer":"Commonwealth of Virginia, State Water Control Board (Department of Environmental Quality)","edition":"Virginia Administrative Code as served by the General Assembly's LIS on 2026-10-09; last amended Virginia Register Volume 40, Issue 24, eff. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"9VAC25-260-140 B, Table of Parameters (freshwater acute)","page":null,"quote":"Chromium VI (µg/l) 5 18540299 16 11 1,100 50"}},{"id":"ec61a4b35b521d42","parameter":"Chromium","value":"11","value_num":11,"statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-47-3","place":["US-VA"],"conditions":["receiving_water is freshwater","Class II tidal freshwater and Classes III-VII (9VAC25-260-140 C); in a Class II transition zone the more stringent of the freshwater and saltwater criteria"],"cite":{"instrument":"us_va_wqs","title":"9VAC25-260-140 — Criteria for surface water (Virginia Water Quality Standards), Table of Parameters","issuer":"Commonwealth of Virginia, State Water Control Board (Department of Environmental Quality)","edition":"Virginia Administrative Code as served by the General Assembly's LIS on 2026-10-09; last amended Virginia Register Volume 40, Issue 24, eff. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"9VAC25-260-140 B, Table of Parameters (freshwater chronic)","page":null,"quote":"Chromium VI (µg/l) 5 18540299 16 11 1,100 50"}},{"id":"d70d0168ebcb0bde","parameter":"Chromium","value":"1,100","value_num":1100,"statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-47-3","place":["US-VA"],"conditions":["receiving_water is marine","Class I and Class II estuarine waters (9VAC25-260-140 C); in a Class II transition zone the more stringent of the freshwater and saltwater criteria"],"cite":{"instrument":"us_va_wqs","title":"9VAC25-260-140 — Criteria for surface water (Virginia Water Quality Standards), Table of Parameters","issuer":"Commonwealth of Virginia, State Water Control Board (Department of Environmental Quality)","edition":"Virginia Administrative Code as served by the General Assembly's LIS on 2026-10-09; last amended Virginia Register Volume 40, Issue 24, eff. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"9VAC25-260-140 B, Table of Parameters (saltwater acute)","page":null,"quote":"Chromium VI (µg/l) 5 18540299 16 11 1,100 50"}},{"id":"275a790dda8d37f4","parameter":"Chromium","value":"50","value_num":50,"statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-47-3","place":["US-VA"],"conditions":["receiving_water is marine","Class I and Class II estuarine waters (9VAC25-260-140 C); in a Class II transition zone the more stringent of the freshwater and saltwater criteria"],"cite":{"instrument":"us_va_wqs","title":"9VAC25-260-140 — Criteria for surface water (Virginia Water Quality Standards), Table of Parameters","issuer":"Commonwealth of Virginia, State Water Control Board (Department of Environmental Quality)","edition":"Virginia Administrative Code as served by the General Assembly's LIS on 2026-10-09; last amended Virginia Register Volume 40, Issue 24, eff. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"9VAC25-260-140 B, Table of Parameters (saltwater chronic)","page":null,"quote":"Chromium VI (µg/l) 5 18540299 16 11 1,100 50"}},{"id":"8fb1872a9885ace2","parameter":"Chromium","value":"5.0","value_num":5,"unit":"mg/L","direction":"max","kind":"threshold","medium":"leachate","level":"national","parameter_key":"cas:7440-47-3","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","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 261.24, Table 1","page":null,"quote":"D007 Chromium 7440-47-3 5.0"}},{"id":"96c2b6d624ded0c8","parameter":"Chromium (Total)","value":"2.77","value_num":2.77,"unit":"mg/L","statistic":"composite","direction":"max","kind":"limit","medium":"product","level":"national","parameter_key":"cas:7440-47-3","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, Inorganic Constituents, wastewater standard","page":null,"quote":"Chromium (Total) 7440-47-3 2.77 0.60 mg/l TCLP"}},{"id":"28487d54f43db568","parameter":"Chromium (Total)","value":"0.60 mg/l TCLP","value_num":0.6,"unit":"mg/L TCLP","statistic":"instant","direction":"max","kind":"limit","medium":"leachate","level":"national","parameter_key":"cas:7440-47-3","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, Inorganic Constituents, nonwastewater standard","page":null,"quote":"Chromium (Total) 7440-47-3 2.77 0.60 mg/l TCLP"}},{"id":"a2fa3493dcb86bd1","parameter":"Total chromium","value":"0.10","value_num":0.1,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","existing sources (BPT)"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS 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=410","source_sha256":"02c53988595c9f2911727f635f59f6a2af0c1d50ce06550c150a706321a505b3","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 410.12 (BPT)","page":null,"quote":"Total chromium 0.10 0.05"}},{"id":"36635e19cc6a833a","parameter":"Total chromium","value":"0.05","value_num":0.05,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","existing sources (BPT)"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS 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=410","source_sha256":"02c53988595c9f2911727f635f59f6a2af0c1d50ce06550c150a706321a505b3","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 410.12 (BPT)","page":null,"quote":"Total chromium 0.10 0.05"}},{"id":"19f355cc15cdb2b4","parameter":"Total chromium","value":"0.10","value_num":0.1,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","existing sources (BAT)"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS 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=410","source_sha256":"02c53988595c9f2911727f635f59f6a2af0c1d50ce06550c150a706321a505b3","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 410.13 (BAT)","page":null,"quote":"Total chromium 0.10 0.05"}},{"id":"561c76aeec589198","parameter":"Total chromium","value":"0.05","value_num":0.05,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","existing sources (BAT)"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS 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=410","source_sha256":"02c53988595c9f2911727f635f59f6a2af0c1d50ce06550c150a706321a505b3","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 410.13 (BAT)","page":null,"quote":"Total chromium 0.10 0.05"}},{"id":"5bfc61f2e78c8431","parameter":"Total chromium","value":"0.10","value_num":0.1,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","new sources (NSPS)","Any new source subject to this subpart must achieve the following new source performance standards (NSPS):"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS 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=410","source_sha256":"02c53988595c9f2911727f635f59f6a2af0c1d50ce06550c150a706321a505b3","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not 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