{"query":{"parameter":"hfpo da","place":"US-PA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-PA","US"],"parameter_keys":["name:hfpo-da","name:somma di pfas","name:sum of the concentration of 25 per- and polyfluoroalkyl substances","name:hazard index pfas","cas:13252-13-6"],"names_matched":[["hfpo da","name:hfpo-da"],["hfpo da","name:somma di pfas"],["hfpo da","name:sum of the concentration of 25 per- and polyfluoroalkyl substances"],["hazard index pfas hfpo da pfbs pfhxs and pfna","name:hazard index pfas"],["hexafluoropropylene oxide dimer acid hfpo da","cas:13252-13-6"],["pfas hexafluoropropylene oxide dimer acid hfpo da","cas:13252-13-6"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":11,"names":["HEXAFLUOROPROPYLENE OXIDE (HFPO) DIMER ACID (Gen-X)","~Hexafluoropropylene oxide dimer acid (HFPO-DA)"],"says":"11 rows share a parameter key with a longer name holding \"hfpo da\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"hfpo da\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":4,"offset":0,"returned":4,"next_offset":null,"rows":[{"id":"561b241a2f4ace40","parameter":"HFPO-DA","value":"0.00001","value_num":0.00001,"unit":"mg/l","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"name:hfpo-da","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level goals are nonenforceable health goals."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"141.50, 141.61","page":null,"quote":null,"column":"mclg"}},{"id":"f27d2421cf311acb","parameter":"HFPO-DA","value":"0.00001","value_num":0.00001,"unit":"mg/l","direction":"max","kind":"limit","medium":"drinking_water","level":"national","parameter_key":"name:hfpo-da","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"141.50, 141.61","page":null,"quote":null,"column":"mcl"}},{"id":"026a24b5cfde09ea","parameter":"Hazard Index PFAS (HFPO-DA, PFBS, PFHxS, and PFNA)","value":"1 (unitless)","value_num":1,"unit":"mg/l","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"name:hazard index pfas","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level goals are nonenforceable health goals."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"141.50, 141.61","page":null,"quote":null,"column":"mclg"}},{"id":"51d81347d05adcd0","parameter":"Hazard Index PFAS (HFPO-DA, PFBS, PFHxS, and PFNA)","value":"1 (unitless)","value_num":1,"unit":"mg/l","direction":"max","kind":"limit","medium":"drinking_water","level":"national","parameter_key":"name:hazard index pfas","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"141.50, 141.61","page":null,"quote":null,"column":"mcl"}}],"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-PA"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"hfpo da\", 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-PA"},"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"}]}