{"query":{"parameter":"parathion","place":"US-TX","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-TX","US"],"parameter_keys":["cas:56-38-2","cas:298-00-0","name:parathion and methyl parathion"],"names_matched":[["parathion","cas:56-38-2"],["methyl parathion","cas:298-00-0"],["parathion and methyl parathion","name:parathion and methyl parathion"],["parathion methyl","cas:298-00-0"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":12,"offset":0,"returned":12,"next_offset":null,"rows":[{"id":"daaed3297981a3fb","parameter":"Parathion (ethyl)","value":"0.065","value_num":0.065,"unit":"µg/L","statistic":"daily_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:56-38-2","place":["US-TX"],"conditions":["receiving_water is freshwater","water in the state; acute criteria outside zones of initial dilution, chronic criteria in water with an aquatic life use of limited or greater, outside mixing zones and above critical low flow (30 TAC §307.6(c)(6))"],"cite":{"instrument":"us_tx_wqs","title":"Texas Surface Water Quality Standards, 30 TAC Chapter 307 (2022): §307.6 Table 1 aquatic life (freshwater and saltwater acute/chronic) and Table 2 human health; §307.7 Table 3 dissolved oxygen","issuer":"State of Texas, Texas Commission on Environmental Quality (TCEQ)","edition":"2022 Texas Surface Water Quality Standards (Rule Project No. 2020-014-307-OW), effective June 27, 2025, as US EPA posts them (cover dated July 1, 2025) with what EPA has approved for CWA purposes","source_url":"https://www.epa.gov/system/files/documents/2023-12/txwqs-2022.pdf","source_sha256":"88ff93dcfb277feec248541b2aa9a0f01cd3a747cda6e03d958344ee4a34ce5e","fetched_at":"2026-10-14","section":"30 TAC §307.6(c) Table 1","page":39,"quote":null}},{"id":"23d1c59258607298","parameter":"Parathion (ethyl)","value":"0.013","value_num":0.013,"unit":"µg/L","statistic":"weekly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:56-38-2","place":["US-TX"],"conditions":["receiving_water is freshwater","water in the state; acute criteria outside zones of initial dilution, chronic criteria in water with an aquatic life use of limited or greater, outside mixing zones and above critical low flow (30 TAC §307.6(c)(6))"],"cite":{"instrument":"us_tx_wqs","title":"Texas Surface Water Quality Standards, 30 TAC Chapter 307 (2022): §307.6 Table 1 aquatic life (freshwater and saltwater acute/chronic) and Table 2 human health; 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or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}