{"query":{"parameter":"hydroquinone","place":"US-NY","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-NY","US"],"parameter_keys":["cas:123-31-9","cas:88-58-4","cas:150-76-5","cas:1948-33-0"],"names_matched":[["hydroquinone","cas:123-31-9"],["2 5 di tert butyl hydroquinone","cas:88-58-4"],["hydroquinone ether monomethylique d","cas:150-76-5"],["tert butyl 2 hydroquinone","cas:1948-33-0"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":8,"offset":0,"returned":8,"next_offset":null,"rows":[{"id":"2729799241427967","parameter":"Hydroquinone","value":"2.2**","value_num":2.2,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:123-31-9","place":["US-NY"],"conditions":["receiving_water is freshwater","New York classes A, A-S, AA, AA-S, B, C (fresh waters; 6 NYCRR Part 701)"],"cite":{"instrument":"us_ny_wqs","title":"6 NYCRR 703.5 Table 1 water quality standards (as DEC TOGS 1.1.1 reprints them) and 703.3 pH, dissolved oxygen and dissolved solids (New York)","issuer":"State of New York, Department of Environmental Conservation","edition":"DEC Division of Water TOGS 1.1.1, reissued June 1998 (the 703.5 standards as revised effective March 12, 1998); 703.3 from 6 NYCRR Parts 700-706 as US EPA posts them in effect for CWA purposes (effective December 20, 2024)","source_url":"https://dec.ny.gov/docs/water_pdf/togs111.pdf","source_sha256":"090692f43a82280ffbf75751ecc52b94fc2d5c78996f9dc2483152343f8f4d59","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"6 NYCRR 703.5(f) Table 1","page":42,"quote":"Hydroquinone A, A-S, AA, AA-S, B, C 2.2** A(C)"}},{"id":"92b5808a65152766","parameter":"Hydroquinone","value":"4.4**","value_num":4.4,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:123-31-9","place":["US-NY"],"conditions":["receiving_water is freshwater","New York classes D (fresh waters; 6 NYCRR Part 701)"],"cite":{"instrument":"us_ny_wqs","title":"6 NYCRR 703.5 Table 1 water quality standards (as DEC TOGS 1.1.1 reprints them) and 703.3 pH, dissolved oxygen and dissolved solids (New York)","issuer":"State of New York, Department of Environmental Conservation","edition":"DEC Division of Water TOGS 1.1.1, reissued June 1998 (the 703.5 standards as revised effective March 12, 1998); 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703.3 from 6 NYCRR Parts 700-706 as US EPA posts them in effect for CWA purposes (effective December 20, 2024)","source_url":"https://dec.ny.gov/docs/water_pdf/togs111.pdf","source_sha256":"090692f43a82280ffbf75751ecc52b94fc2d5c78996f9dc2483152343f8f4d59","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"6 NYCRR 703.5(f) Table 1","page":42,"quote":"Hydroquinone A, A-S, AA, AA-S, B, C 2.2** A(C) (123-31-9) D 4.4** A(A) A, A-S, AA, AA-S * E"}},{"id":"adc31293fac29111","parameter":"Hydroquinone","value":"see Remark ***","unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:123-31-9","place":["US-NY"],"conditions":["receiving_water is freshwater","New York classes B, C, D (fresh waters; 6 NYCRR Part 701)"],"cite":{"instrument":"us_ny_wqs","title":"6 NYCRR 703.5 Table 1 water quality standards (as DEC TOGS 1.1.1 reprints them) and 703.3 pH, dissolved oxygen and dissolved solids (New York)","issuer":"State of New York, Department of Environmental Conservation","edition":"DEC Division of Water TOGS 1.1.1, reissued June 1998 (the 703.5 standards as revised effective March 12, 1998); 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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":"f76b37bc71c47c15","parameter":"Hydroquinone","value":"1.3","value_num":1.3,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:123-31-9","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"}}],"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-NY"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"hydroquinone\", 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-NY"},"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"}]}