{"query":{"parameter":"methylmercury 1","place":"US-MO","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MO","US"],"parameter_keys":["cas:22967-92-6","cas:7439-97-6","name:mercury, including methylmercury","name:methylmercury"],"names_matched":[["methylmercury 1","cas:22967-92-6"],["mercury including methylmercury","cas:7439-97-6","methylmercury"],["mercury including methylmercury","name:mercury, including methylmercury","methylmercury"],["mercury including methylmercury total recoverable","cas:7439-97-6","methylmercury"],["methylmercury","name:methylmercury","methylmercury"],["methylmercury water column","name:methylmercury","methylmercury"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":357,"names":["Mercury","Mercury, total","Hg","Mercury (T)","~Mercury (elemental)","Mercury—All Others","Mercury—Nonwastewater from Retort"],"says":"357 rows share a parameter key with a longer name holding \"methylmercury 1\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"methylmercury 1\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":6,"offset":0,"returned":6,"next_offset":null,"rows":[{"id":"fbbd964c0cf01275","parameter":"Methylmercury","value":"1.4","value_num":1.4,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:methylmercury","place":["US-MO"],"conditions":["receiving_water is freshwater","waters designated for aquatic life protection (Missouri Use Designation Dataset; Tables G and H)"],"cite":{"instrument":"us_mo_wqs","title":"Missouri 10 CSR 20-7.031 Water Quality Standards: Table A1 criteria for designated uses, Table A2 equations, pH and the chloride-plus-sulfate limit","issuer":"State of Missouri, Clean Water Commission (Department of Natural Resources)","edition":"10 CSR 20-7.010 to 7.050, effective March 8, 2023, as US EPA posts it in effect for CWA purposes (cover July 31, 2023: EPA disapproved Table K's Sni-a-bar Creek dissolved oxygen criteria, the Joplin Turkey Creek zinc variance and some whole-body-contact use removals; no action on the Bolivar variance)","source_url":"https://www.epa.gov/system/files/documents/2023-07/mowqs.pdf","source_sha256":"edc4a64b3e9493d597a1d67fc1d5a3307c70c53cf6f35bfaf252722aba64277d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"10 CSR 20-7.031 (5) Table A1","page":24,"quote":"Methylmercury 22967926 1.4"}},{"id":"07e79450b715f248","parameter":"Methylmercury","value":"0.77","value_num":0.77,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:methylmercury","place":["US-MO"],"conditions":["receiving_water is freshwater","waters designated for aquatic life protection (Missouri Use Designation Dataset; Tables G and H)"],"cite":{"instrument":"us_mo_wqs","title":"Missouri 10 CSR 20-7.031 Water Quality Standards: Table A1 criteria for designated uses, Table A2 equations, pH and the chloride-plus-sulfate limit","issuer":"State of Missouri, Clean Water Commission (Department of Natural Resources)","edition":"10 CSR 20-7.010 to 7.050, effective March 8, 2023, as US EPA posts it in effect for CWA purposes (cover July 31, 2023: EPA disapproved Table K's Sni-a-bar Creek dissolved oxygen criteria, the Joplin Turkey Creek zinc variance and some whole-body-contact use removals; no action on the Bolivar variance)","source_url":"https://www.epa.gov/system/files/documents/2023-07/mowqs.pdf","source_sha256":"edc4a64b3e9493d597a1d67fc1d5a3307c70c53cf6f35bfaf252722aba64277d","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"10 CSR 20-7.031 (5) Table A1","page":24,"quote":"Methylmercury 22967926 1.4 0.77"}},{"id":"c910c3aa33f73712","parameter":"~Methyl Mercury","value":"7.8","value_num":7.8,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:22967-92-6","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":"not verified"},"section":null,"page":null,"quote":null,"table":"sols","column":"residentiel"}},{"id":"f96684753a3cbc33","parameter":"~Methyl Mercury","value":"120","value_num":120,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:22967-92-6","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":"not verified"},"section":null,"page":null,"quote":null,"table":"sols","column":"industriel"}},{"id":"8d8e3f9b2df141fb","parameter":"~Methyl Mercury","value":"14","value_num":14,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:22967-92-6","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":"not verified"},"section":null,"page":null,"quote":null,"table":"ssl","column":"risque"}},{"id":"2d3c6a408af92698","parameter":"~Methyl Mercury","value":"2","value_num":2,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:22967-92-6","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":"not verified"},"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-MO"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"methylmercury 1\", 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-MO"},"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"}]}