{"query":{"parameter":"chromium total","place":"US-CO","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-CO","US"],"parameter_keys":["cas:7440-47-3","name:chromium total","name:chromium, total","name:chromium +3, total","name:chromium (+3)","name:chromium +6, total","name:chromium (+6)","cas:18540-29-9","cas:16065-83-1","name:total chromium","name:cromo totale","name:chrome total","name:chromium-51","name:chromium +6","name:chromium ii iii","name:chromium (vi) (freshwater) chromium (vi) marine","cas:92203-02-6"],"names_matched":[["chromium total","cas:7440-47-3"],["chromium total","name:chromium total"],["chromium total","name:chromium, total"],["chromium 3 total","name:chromium +3, total"],["chromium 3 total recoverable","name:chromium (+3)"],["chromium 6 total","name:chromium +6, total"],["chromium 6 total recoverable","name:chromium (+6)"],["chromium hexavalent total","cas:18540-29-9"],["chromium iii total","cas:16065-83-1"],["chromium iii total recoverable","cas:16065-83-1"],["chromium total hexavalent cr vi","cas:18540-29-9"],["chromium total trivalent cr iii","cas:16065-83-1"],["chromium vi total","cas:18540-29-9"],["chromium vi total recoverable","cas:18540-29-9"],["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"],["chromium 3","cas:16065-83-1","chromium"],["chromium 3","name:chromium (+3)","chromium"],["chromium 51","name:chromium-51","chromium"],["chromium 6","cas:18540-29-9","chromium"],["chromium 6","name:chromium (+6)","chromium"],["chromium 6","name:chromium +6","chromium"],["chromium and chromium compounds metallic divalent and trivalent","name:chromium ii iii","chromium"],["chromium compounds hexavalent","cas:18540-29-9","chromium"],["chromium hex","cas:18540-29-9","chromium"],["chromium hex dissolved","cas:18540-29-9","chromium"],["chromium hexavalent","cas:18540-29-9","chromium"],["chromium hexavalent cr vi","cas:18540-29-9","chromium"],["chromium hexavalent dissolved","cas:18540-29-9","chromium"],["chromium ii iii","name:chromium ii iii","chromium"],["chromium iii","cas:16065-83-1","chromium"],["chromium iii dissolved","cas:16065-83-1","chromium"],["chromium iii insoluble salts","cas:16065-83-1","chromium"],["chromium iii soluble compounds","cas:16065-83-1","chromium"],["chromium tri","cas:16065-83-1","chromium"],["chromium trivalent","cas:16065-83-1","chromium"],["chromium trivalent cr iii","cas:16065-83-1","chromium"],["chromium trivalent dissolved","cas:16065-83-1","chromium"],["chromium vi","cas:18540-29-9","chromium"],["chromium vi and compounds 1 12","cas:18540-29-9","chromium"],["chromium vi and compounds 1 13","cas:18540-29-9","chromium"],["chromium vi dissolved","cas:18540-29-9","chromium"],["chromium vi freshwater chromium vi marine","name:chromium (vi) (freshwater) chromium (vi) marine","chromium"],["hexavalent chromium","cas:18540-29-9","chromium"],["phosphoric acid reaction products with aluminum hydroxide and chromium oxide cro3","cas:92203-02-6","chromium"],["total chromium","name:total chromium","chromium"]],"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"},"total":2727,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"497c4857cc4c0580","parameter":"Chromium VI","value":"16","value_num":16,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:18540-29-9","place":["US-CO"],"conditions":["receiving_water is freshwater","a segment whose standards adopt the table value standards (TVS) of Table III (segment tables in Regulations 32 to 38)","segments classified for aquatic life"],"cite":{"instrument":"us_co_wqs","title":"Colorado Regulation No. 31 (5 CCR 1002-31) Basic Standards and Methodologies for Surface Water: Table B organic chemicals, Table III metals, Table IV metals at selected hardness","issuer":"State of Colorado, Water Quality Control Commission (Department of Public Health and Environment)","edition":"5 CCR 1002-31 effective December 31, 2024 (adopted August 21, 2024), the Secretary of State's official PDF; 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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. 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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) 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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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