{"query":{"parameter":"perchlorate","place":"US-CA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-CA","US"],"parameter_keys":["cas:14797-73-0","cas:7601-90-3","cas:7790-98-9","cas:7791-03-9","cas:7778-74-7","cas:7601-89-0"],"names_matched":[["perchlorate","cas:14797-73-0"],["perchlorate","cas:7601-90-3"],["perchlorate","cas:7790-98-9"],["lithium perchlorate","cas:7791-03-9"],["potassium perchlorate","cas:7778-74-7"],["sodium perchlorate","cas:7601-89-0"],["perchloric acid lithium salt","cas:7791-03-9","perchloric acid"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":9,"names":["~Lithium Perchlorate","~Potassium Perchlorate","~Sodium Perchlorate"],"says":"9 rows share a parameter key with a longer name holding \"perchlorate\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"perchlorate\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":9,"offset":0,"returned":9,"next_offset":null,"rows":[{"id":"05d9693168a98640","parameter":"Perchlorate","value":"6.0E+00","value_num":6,"unit":"µg/L","direction":"max","kind":"guideline","medium":"groundwater","level":"regional","parameter_key":"cas:14797-73-0","place":["US-CA"],"conditions":["Tier 1 ESLs: one level per chemical and medium for a generic site (residential land use, groundwater a drinking-water resource, shallow soil); a screening level is not a cleanup standard"],"cite":{"instrument":"us_ca_esl_groundwater","title":"California, San Francisco Bay RWQCB — Environmental Screening Levels (ESLs), Tier 1, 2025 (Rev. 4) — groundwater","issuer":"San Francisco Bay Regional Water Quality Control Board","edition":"2025 (Rev. 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export, as base64; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}