{"query":{"parameter":"malathion","place":"US-AZ","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-AZ","US"],"parameter_keys":["cas:121-75-5"],"names_matched":[["malathion","cas:121-75-5"]],"match":"exact","order":"The place's own instruments first, then each place above it, each in its register's order; rows for a marine receiving water after the rest, as none of the place's own rows names a marine, salt, estuarine, coastal or ocean water"},"total":12,"offset":0,"returned":12,"next_offset":null,"rows":[{"id":"52a77368968289fd","parameter":"Malathion","value":"140","value_num":140,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:121-75-5","place":["US-AZ"],"conditions":["receiving_water is freshwater","surface water with the designated use DWS, domestic water source (A.A.C. R18-11-104; uses by water in Appendix B)"],"cite":{"instrument":"us_az_wqs","title":"Arizona A.A.C. 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R18-11-104; uses by water in Appendix B)"],"cite":{"instrument":"us_az_wqs","title":"Arizona A.A.C. R18-11 Appendix A: Table 1 numeric water quality standards by designated use, and Tables 2-9 hardness-dependent metals","issuer":"State of Arizona, Department of Environmental Quality","edition":"18 A.A.C. 11 as US EPA posts it in effect for CWA purposes (effective June 10, 2025; cover September 19, 2025); Appendix A as amended at 22 A.A.R. 2328, effective August 2, 2016 (Supp. 16-4)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/az-chapter11.pdf","source_sha256":"99f94cb118d44c2d748701484be39ab062258b07e3912fae7c9a651fcc4fc6ce","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"18 A.A.C. 11, Appendix A, Table 1","page":36,"quote":null}},{"id":"ed3e14cf3f5e9554","parameter":"Malathion","value":"0.1","value_num":0.1,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:121-75-5","place":["US-AZ"],"conditions":["receiving_water is freshwater","surface water with the designated use A&Wedw, aquatic and wildlife (effluent-dependent water) (A.A.C. R18-11-104; uses by water in Appendix B)"],"cite":{"instrument":"us_az_wqs","title":"Arizona A.A.C. 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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":"f2765d82cfae8317","parameter":"Malathion","value":"390","value_num":390,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:121-75-5","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"}},{"id":"60908fd7e7f5ee2d","parameter":"Malathion","value":"0.1","value_num":0.1,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:121-75-5","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is marine","Saltwater CCC (chronic): criterion continuous concentration, chronic"],"cite":{"instrument":"us_nrwqc_aquatic","title":"EPA National Recommended Water Quality Criteria — Aquatic Life Criteria Table (freshwater and saltwater CMC/CCC)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table, last updated on June 9, 2026 (fetched 2026-10-09); 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or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}