{"query":{"parameter":"methylmercury 1","place":"US-MA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MA","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":359,"names":["Mercury","Mercury, total","Hg","Mercury (T)","~Mercury (elemental)","Mercury—All Others","Mercury—Nonwastewater from Retort","Mercury (inorganic)"],"says":"359 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. 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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-MA"},"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-MA"},"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"}]}