{"query":{"parameter":"chromium","place":"US-IL","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-IL","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 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 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 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; 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":2705,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"d0a8c8be1b884850","parameter":"Chromium","value":"0.05","value_num":0.05,"unit":"mg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-47-3","place":["US-IL"],"conditions":["receiving_water is freshwater","at any point at which water is withdrawn for treatment and distribution as a potable supply or for food processing (35 Ill. Adm. Code 302.301)"],"cite":{"instrument":"us_il_wqs","title":"Illinois 35 Ill. Adm. Code 302 Water Quality Standards: general use (Subpart B), public and food processing water supply (Subpart C) and Lake Michigan Basin (Subpart E) numeric standards","issuer":"State of Illinois, Pollution Control Board","edition":"35 Ill. Adm. Code Part 302 effective June 24, 2019, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2019-11/documents/ilwqs-title35-part302.pdf","source_sha256":"5e0bbfc56069872e1b0fbe1ed98672de1c3b2fda558ded29028800410f829b13","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"35 Ill. Adm. Code 302.304","page":36,"quote":"Chromium 0.05"}},{"id":"6dfd00abe2e2c34e","parameter":"Chromium (trivalent, dissolved)","value":"e^(A + B ln(H)) × 0.316*, A = 3.688, B = 0.8190","unit":"µg/L","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:16065-83-1","place":["US-IL"],"conditions":["receiving_water is freshwater","General Use waters: waters of the State for which there is no specific designation (35 Ill. Adm. Code 302.201)","hardness-dependent: the row's equation of the receiving water's hardness (mg/L as CaCO3), with A and B as printed; * = conversion factor for dissolved metals"],"cite":{"instrument":"us_il_wqs","title":"Illinois 35 Ill. Adm. Code 302 Water Quality Standards: general use (Subpart B), public and food processing water supply (Subpart C) and Lake Michigan Basin (Subpart E) numeric standards","issuer":"State of Illinois, Pollution Control Board","edition":"35 Ill. Adm. Code Part 302 effective June 24, 2019, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2019-11/documents/ilwqs-title35-part302.pdf","source_sha256":"5e0bbfc56069872e1b0fbe1ed98672de1c3b2fda558ded29028800410f829b13","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"35 Ill. Adm. Code 302.208(e)","page":23,"quote":"Chromium eA+Bln(H) ×0.316* eA+Bln(H) ×0.860* (trivalent, dissolved) where A = 3.688 and where A = 1.561 and B = 0.8190 B = 0.8190"}},{"id":"36daddf594c06699","parameter":"Chromium (trivalent, dissolved)","value":"e^(A + B ln(H)) × 0.860*, A = 1.561, B = 0.8190","unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:16065-83-1","place":["US-IL"],"conditions":["receiving_water is freshwater","General Use waters: waters of the State for which there is no specific designation (35 Ill. Adm. Code 302.201)","hardness-dependent: the row's equation of the receiving water's hardness (mg/L as CaCO3), with A and B as printed; * = conversion factor for dissolved metals"],"cite":{"instrument":"us_il_wqs","title":"Illinois 35 Ill. Adm. Code 302 Water Quality Standards: general use (Subpart B), public and food processing water supply (Subpart C) and Lake Michigan Basin (Subpart E) numeric standards","issuer":"State of Illinois, Pollution Control Board","edition":"35 Ill. Adm. Code Part 302 effective June 24, 2019, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2019-11/documents/ilwqs-title35-part302.pdf","source_sha256":"5e0bbfc56069872e1b0fbe1ed98672de1c3b2fda558ded29028800410f829b13","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"35 Ill. Adm. Code 302.208(e)","page":23,"quote":"Chromium eA+Bln(H) ×0.316* eA+Bln(H) ×0.860* (trivalent, dissolved) where A = 3.688 and where A = 1.561 and B = 0.8190 B = 0.8190"}},{"id":"98fd0dcd5af0b0f2","parameter":"Chromium (trivalent, dissolved)","value":"e^(A + B ln(H)) × 0.316*, A = 3.7256, B = 0.819","unit":"µg/L","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:16065-83-1","place":["US-IL"],"conditions":["receiving_water is freshwater","waters of the Lake Michigan Basin (35 Ill. Adm. Code 303.443)","hardness-dependent: the row's equation of the receiving water's hardness (mg/L as CaCO3), with A and B as printed; * = conversion factor for dissolved metals"],"cite":{"instrument":"us_il_wqs","title":"Illinois 35 Ill. Adm. Code 302 Water Quality Standards: general use (Subpart B), public and food processing water supply (Subpart C) and Lake Michigan Basin (Subpart E) numeric standards","issuer":"State of Illinois, Pollution Control Board","edition":"35 Ill. Adm. Code Part 302 effective June 24, 2019, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2019-11/documents/ilwqs-title35-part302.pdf","source_sha256":"5e0bbfc56069872e1b0fbe1ed98672de1c3b2fda558ded29028800410f829b13","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"35 Ill. Adm. Code 302.504(a)","page":59,"quote":"Chromium µg/L exp[ A+Bln( H)]× exp[ A+Bln( H)]× NA (Trivalent, 0.316* 0.860* dissolved) where A = 3.7256 where A = 0.6848 and B = 0.819 and B = 0.819"}},{"id":"01247799091972bf","parameter":"Chromium (trivalent, dissolved)","value":"e^(A + B ln(H)) × 0.860*, A = 0.6848, B = 0.819","unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:16065-83-1","place":["US-IL"],"conditions":["receiving_water is freshwater","waters of the Lake Michigan Basin (35 Ill. Adm. Code 303.443)","hardness-dependent: the row's equation of the receiving water's hardness (mg/L as CaCO3), with A and B as printed; * = conversion factor for dissolved metals"],"cite":{"instrument":"us_il_wqs","title":"Illinois 35 Ill. Adm. Code 302 Water Quality Standards: general use (Subpart B), public and food processing water supply (Subpart C) and Lake Michigan Basin (Subpart E) numeric standards","issuer":"State of Illinois, Pollution Control Board","edition":"35 Ill. Adm. Code Part 302 effective June 24, 2019, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2019-11/documents/ilwqs-title35-part302.pdf","source_sha256":"5e0bbfc56069872e1b0fbe1ed98672de1c3b2fda558ded29028800410f829b13","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"35 Ill. Adm. Code 302.504(a)","page":59,"quote":"Chromium µg/L exp[ A+Bln( H)]× exp[ A+Bln( H)]× NA (Trivalent, 0.316* 0.860* dissolved) where A = 3.7256 where A = 0.6848 and B = 0.819 and B = 0.819"}},{"id":"c1f93aeb45faf46e","parameter":"Chromium (hexavalent, total)","value":"16","value_num":16,"unit":"µg/L","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:18540-29-9","place":["US-IL"],"conditions":["receiving_water is freshwater","General Use waters: waters of the State for which there is no specific designation (35 Ill. Adm. Code 302.201)"],"cite":{"instrument":"us_il_wqs","title":"Illinois 35 Ill. Adm. Code 302 Water Quality Standards: general use (Subpart B), public and food processing water supply (Subpart C) and Lake Michigan Basin (Subpart E) numeric standards","issuer":"State of Illinois, Pollution Control Board","edition":"35 Ill. Adm. Code Part 302 effective June 24, 2019, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2019-11/documents/ilwqs-title35-part302.pdf","source_sha256":"5e0bbfc56069872e1b0fbe1ed98672de1c3b2fda558ded29028800410f829b13","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"35 Ill. Adm. Code 302.208(e)","page":23,"quote":"Chromium 16 11 (hexavalent, total)"}},{"id":"2146ed0ad98566e7","parameter":"Chromium (hexavalent, total)","value":"11","value_num":11,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:18540-29-9","place":["US-IL"],"conditions":["receiving_water is freshwater","General Use waters: waters of the State for which there is no specific designation (35 Ill. Adm. Code 302.201)"],"cite":{"instrument":"us_il_wqs","title":"Illinois 35 Ill. Adm. Code 302 Water Quality Standards: general use (Subpart B), public and food processing water supply (Subpart C) and Lake Michigan Basin (Subpart E) numeric standards","issuer":"State of Illinois, Pollution Control Board","edition":"35 Ill. Adm. Code Part 302 effective June 24, 2019, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2019-11/documents/ilwqs-title35-part302.pdf","source_sha256":"5e0bbfc56069872e1b0fbe1ed98672de1c3b2fda558ded29028800410f829b13","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"35 Ill. Adm. Code 302.208(e)","page":23,"quote":"Chromium 16 11 (hexavalent, total)"}},{"id":"7efcc68cd2e4f97c","parameter":"Chromium (hexavalent, total)","value":"16","value_num":16,"unit":"µg/L","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:18540-29-9","place":["US-IL"],"conditions":["receiving_water is freshwater","waters of the Lake Michigan Basin (35 Ill. Adm. Code 303.443)"],"cite":{"instrument":"us_il_wqs","title":"Illinois 35 Ill. Adm. Code 302 Water Quality Standards: general use (Subpart B), public and food processing water supply (Subpart C) and Lake Michigan Basin (Subpart E) numeric standards","issuer":"State of Illinois, Pollution Control Board","edition":"35 Ill. Adm. Code Part 302 effective June 24, 2019, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2019-11/documents/ilwqs-title35-part302.pdf","source_sha256":"5e0bbfc56069872e1b0fbe1ed98672de1c3b2fda558ded29028800410f829b13","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"35 Ill. Adm. Code 302.504(a)","page":59,"quote":"Chromium µg/L 16 11 NA (Hexavalent, total)"}},{"id":"c5aebd32c9d5758d","parameter":"Chromium (hexavalent, total)","value":"11","value_num":11,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:18540-29-9","place":["US-IL"],"conditions":["receiving_water is freshwater","waters of the Lake Michigan Basin (35 Ill. Adm. Code 303.443)"],"cite":{"instrument":"us_il_wqs","title":"Illinois 35 Ill. Adm. Code 302 Water Quality Standards: general use (Subpart B), public and food processing water supply (Subpart C) and Lake Michigan Basin (Subpart E) numeric standards","issuer":"State of Illinois, Pollution Control Board","edition":"35 Ill. Adm. Code Part 302 effective June 24, 2019, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2019-11/documents/ilwqs-title35-part302.pdf","source_sha256":"5e0bbfc56069872e1b0fbe1ed98672de1c3b2fda558ded29028800410f829b13","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"35 Ill. Adm. Code 302.504(a)","page":59,"quote":"Chromium µg/L 16 11 NA (Hexavalent, total)"}},{"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","section":"40 CFR 261.24, Table 1","page":null,"quote":"D007 Chromium 7440-47-3 5.0"}},{"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":"unchanged"},"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":"unchanged"},"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":"unchanged"},"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":"unchanged"},"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":"unchanged"},"section":"40 CFR 410.15 (NSPS)","page":null,"quote":"Total chromium 0.10 0.05"}},{"id":"8dbd6e58fdbd9768","parameter":"Total 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