{"query":{"parameter":"chromium iii","place":"US-OR","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-OR","US"],"parameter_keys":["cas:16065-83-1","name:chromium ii iii","cas:7440-47-3","name:chromium (+3)","name:chromium +3, total"],"names_matched":[["chromium iii","cas:16065-83-1"],["chromium ii iii","name:chromium ii iii"],["chromium 3","cas:7440-47-3","chromium 3"],["chromium 3","name:chromium (+3)","chromium 3"],["chromium 3 total","name:chromium +3, total","chromium 3"],["chromium 3 total recoverable","name:chromium (+3)","chromium 3"],["chromium and chromium compounds metallic divalent and trivalent","name:chromium ii iii","chromium trivalent"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":2522,"names":["Chromium","Chromium (total)","Total chromium","Total Chromium","Chromium (Total)","Chromium (T)","Cr","Chromium, total"],"says":"2522 rows share a parameter key with a longer name holding \"chromium iii\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"chromium iii\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":12,"offset":0,"returned":12,"next_offset":null,"rows":[{"id":"60190365e0ea8016","parameter":"Chromium III","value":"See C, F","unit":"µg/L","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:16065-83-1","place":["US-OR"],"conditions":["receiving_water is freshwater","waters where fish and aquatic life is a designated use (OAR 340-041-8033 Table 30)","hardness-dependent: the criterion is endnote F's equation of the receiving water's hardness"],"cite":{"instrument":"us_or_wqs","title":"Oregon OAR 340-041-8033: Table 30 aquatic life criteria for toxic pollutants (freshwater and saltwater acute/chronic) and Table 40 human health criteria","issuer":"State of Oregon, Environmental Quality Commission (Department of Environmental Quality)","edition":"OAR Chapter 340 Division 41 effective March 12, 2021, as US EPA posts it in effect for CWA purposes (cover dated June 22, 2021); Tables 30 and 40 as Attachment 2 (Table 40 effective April 18, 2014)","source_url":"https://www.epa.gov/sites/default/files/2020-11/documents/orwqs.pdf","source_sha256":"7b081b31df37b26843f06b807f9d0e5a0e505584ef85e24a0c38b38a782f0bcf","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"OAR 340-041-8033 Table 30","page":88,"quote":null}},{"id":"652f6ddd20461bfa","parameter":"Chromium III","value":"See C, F","unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:16065-83-1","place":["US-OR"],"conditions":["receiving_water is freshwater","waters where fish and aquatic life is a designated use (OAR 340-041-8033 Table 30)","hardness-dependent: the criterion is endnote F's equation of the receiving water's hardness"],"cite":{"instrument":"us_or_wqs","title":"Oregon OAR 340-041-8033: Table 30 aquatic life criteria for toxic pollutants (freshwater and saltwater acute/chronic) and Table 40 human health criteria","issuer":"State of Oregon, Environmental Quality Commission (Department of Environmental Quality)","edition":"OAR Chapter 340 Division 41 effective March 12, 2021, as US EPA posts it in effect for CWA purposes (cover dated June 22, 2021); Tables 30 and 40 as Attachment 2 (Table 40 effective April 18, 2014)","source_url":"https://www.epa.gov/sites/default/files/2020-11/documents/orwqs.pdf","source_sha256":"7b081b31df37b26843f06b807f9d0e5a0e505584ef85e24a0c38b38a782f0bcf","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"OAR 340-041-8033 Table 30","page":88,"quote":null}},{"id":"f7e7e982fe5f3a70","parameter":"Chromium (III)","value":"570","value_num":570,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is freshwater","Freshwater CMC (acute): criterion maximum concentration, acute","corresponds to a hardness of 100 mg/L as CaCO3 (the table's value; the criterion is a function of hardness)"],"cite":{"instrument":"us_nrwqc_aquatic","title":"EPA National Recommended Water Quality Criteria — Aquatic Life Criteria Table (freshwater and saltwater CMC/CCC)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table, last updated on June 9, 2026 (fetched 2026-10-09); each criterion carries its publication year","source_url":"https://www.epa.gov/wqc/national-recommended-water-quality-criteria-aquatic-life-criteria-table","source_sha256":"be6b429558db9852c3456eb22c17046aa1a3335ee89e702e8afb793f9b5b25ec","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"National Recommended Aquatic Life Criteria table","page":null,"quote":"Chromium (III) (P) 16065831 570 74 — — 1995"}},{"id":"8be5c44fff00162f","parameter":"Chromium (III)","value":"exp{0.8190 [ln(hardness)] + 3.7256} × CF, CF = 0.316","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is freshwater","Freshwater CMC (acute), computed at the receiving water's hardness (mg/L as CaCO3) by the printed equation; never evaluated here"],"cite":{"instrument":"us_nrwqc_aquatic","title":"EPA National Recommended Water Quality Criteria — Aquatic Life Criteria Table (freshwater and saltwater CMC/CCC)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table, last updated on June 9, 2026 (fetched 2026-10-09); each criterion carries its publication year","source_url":"https://www.epa.gov/wqc/national-recommended-water-quality-criteria-aquatic-life-criteria-table","source_sha256":"be6b429558db9852c3456eb22c17046aa1a3335ee89e702e8afb793f9b5b25ec","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Appendix B — Parameters for Calculating Freshwater Dissolved Metals Criteria That Are Hardness-Dependent","page":null,"quote":"Chromium III 0.8190 3.7256 0.8190 0.6848 0.316 0.860"}},{"id":"0255141d4eae87c6","parameter":"Chromium (III)","value":"74","value_num":74,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is freshwater","Freshwater CCC (chronic): criterion continuous concentration, chronic","corresponds to a hardness of 100 mg/L as CaCO3 (the table's value; the criterion is a function of hardness)"],"cite":{"instrument":"us_nrwqc_aquatic","title":"EPA National Recommended Water Quality Criteria — Aquatic Life Criteria Table (freshwater and saltwater CMC/CCC)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table, last updated on June 9, 2026 (fetched 2026-10-09); each criterion carries its publication year","source_url":"https://www.epa.gov/wqc/national-recommended-water-quality-criteria-aquatic-life-criteria-table","source_sha256":"be6b429558db9852c3456eb22c17046aa1a3335ee89e702e8afb793f9b5b25ec","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"National Recommended Aquatic Life Criteria table","page":null,"quote":"Chromium (III) (P) 16065831 570 74 — — 1995"}},{"id":"e745fb99b39e6663","parameter":"Chromium (III)","value":"exp{0.8190 [ln(hardness)] + 0.6848} × CF, CF = 0.860","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is freshwater","Freshwater CCC (chronic), computed at the receiving water's hardness (mg/L as CaCO3) by the printed equation; never evaluated here"],"cite":{"instrument":"us_nrwqc_aquatic","title":"EPA National Recommended Water Quality Criteria — Aquatic Life Criteria Table (freshwater and saltwater CMC/CCC)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table, last updated on June 9, 2026 (fetched 2026-10-09); each criterion carries its publication year","source_url":"https://www.epa.gov/wqc/national-recommended-water-quality-criteria-aquatic-life-criteria-table","source_sha256":"be6b429558db9852c3456eb22c17046aa1a3335ee89e702e8afb793f9b5b25ec","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Appendix B — Parameters for Calculating Freshwater Dissolved Metals Criteria That Are Hardness-Dependent","page":null,"quote":"Chromium III 0.8190 3.7256 0.8190 0.6848 0.316 0.860"}},{"id":"89bfca74185a9ba3","parameter":"Chromium(III) (Soluble Compounds)","value":"85000","value_num":85000,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["Resident Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"sols","column":"residentiel"}},{"id":"873b643e9364904c","parameter":"Chromium(III) (Soluble Compounds)","value":"360000","value_num":360000,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["Industrial Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"sols","column":"industriel"}},{"id":"1402c5aeb7e7555c","parameter":"Chromium(III), Insoluble Salts","value":"120000","value_num":120000,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["Resident Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"sols","column":"residentiel"}},{"id":"e37e396648c7b821","parameter":"Chromium(III), Insoluble Salts","value":"1800000","value_num":1800000,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["Industrial Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"sols","column":"industriel"}},{"id":"ce302f7434d10510","parameter":"Chromium(III), Insoluble Salts","value":"40000000","value_num":40000000,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["Protection of Groundwater SSLs: Risk-based SSL (mg/kg); SSL values are based on DAF=1"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"ssl","column":"risque"}},{"id":"52c6f5ace5c2e247","parameter":"Chromium(III), Insoluble Salts","value":"22000","value_num":22000,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:16065-83-1","place":["US"],"conditions":["Tap Water (ug/L): Regional Screening Level (RSL) Summary Table (TR=1E-06, HQ=1) November 2024"],"cite":{"instrument":"us_rsl_tapwater","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Tap Water","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"eau","column":"eau_robinet"}}],"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-OR"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"chromium iii\", value, unit}, ...], any other parameters too."},"post":"/api/v1/check"},{"tool":"read_certificate","says":"Has your user a laboratory certificate? read_certificate reads every row it prints, each with its page, and checks them against these limits.","arguments":{"place":"US-OR"},"needs":{"content_base64":"The laboratory's certificate (PDF) or its XLSX, XLS or CSV export, as base64; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}