{"query":{"parameter":"ozone","place":"US-WA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-WA","US"],"parameter_keys":["cas:10028-15-6"],"names_matched":[["ozone","cas:10028-15-6"]],"match":"exact","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":2,"offset":0,"returned":2,"next_offset":null,"rows":[{"id":"457867ba0547aae4","parameter":"ozone","value":"0.070","value_num":0.07,"unit":"ppm","direction":"max","kind":"limit","medium":"ambient_air","level":"national","parameter_key":"cas:10028-15-6","place":["US"],"conditions":["3-year average of the annual fourth-highest daily maximum 8-hour average O 3 concentration"],"cite":{"instrument":"us_naaqs","title":"40 CFR Part 50, National Primary and Secondary Ambient Air Quality Standards, §§ 50.4–50.21 (eCFR as of 2026-08-01)","issuer":null,"edition":"90 FR 4651, Jan. 16, 2025","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=50","source_sha256":null,"fetched_at":null,"source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"§ 50.19 National primary and secondary ambient air quality standards for ozone.","page":null,"quote":"(a) The level of the national 8-hour primary ambient air quality standard for ozone (O 3 ) is 0.070 parts per million (ppm), daily maximum 8-hour average,","column":"valeur"}},{"id":"771ff1a5f7cca8a0","parameter":"ozone","value":"0.070","value_num":0.07,"unit":"ppm","direction":"max","kind":"limit","medium":"ambient_air","level":"national","parameter_key":"cas:10028-15-6","place":["US"],"conditions":["3-year average of the annual fourth-highest daily maximum 8-hour average O 3 concentration"],"cite":{"instrument":"us_naaqs","title":"40 CFR Part 50, National Primary and Secondary Ambient Air Quality Standards, §§ 50.4–50.21 (eCFR as of 2026-08-01)","issuer":null,"edition":"90 FR 4651, Jan. 16, 2025","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=50","source_sha256":null,"fetched_at":null,"source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"§ 50.19 National primary and secondary ambient air quality standards for ozone.","page":null,"quote":"(c) The level of the national secondary ambient air quality standard for O 3 is 0.070 ppm, daily maximum 8-hour average,","column":"valeur"}}],"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-WA"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"ozone\", 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-WA"},"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"}]}