{"query":{"parameter":"styrene","place":"US-AK","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-AK","US"],"parameter_keys":["cas:100-42-5","cas:98-83-9","cas:25767-47-9","cas:64614-15-9","cas:9003-70-7","cas:68938-27-2","cas:622-97-9","cas:25750-06-5","cas:25013-15-4","name:styrene-acrylonitrile [san] trimer","cas:57964-39-3","cas:57964-40-6","cas:96-09-3"],"names_matched":[["styrene","cas:100-42-5"],["a methyl styrene","cas:98-83-9"],["butyl acrylate styrene polymer","cas:25767-47-9"],["butyl methacrylate butyl acrylate styrene methyl methacrylate propylene glycol monoacrylate acrylic acid polymer","cas:64614-15-9"],["divinylbenzene styrene polymer","cas:9003-70-7"],["fatty acids soya polymers with acrylonitrile crotonic acid 2 ethylhexyl acrylate me methacrylate pentaerythritol phthalic anhydride and styrene","cas:68938-27-2"],["methyl 4 styrene","cas:622-97-9"],["methyl methacrylate 2 ethylhexyl acrylate styrene polymer","cas:25750-06-5"],["methyl styrene alpha","cas:98-83-9"],["methyl styrene mixed","cas:25013-15-4"],["methyl styrene mixed isomers","cas:25013-15-4"],["p methyl styrene","cas:622-97-9"],["styrene acrylonitrile san trimer","name:styrene-acrylonitrile [san] trimer"],["styrene acrylonitrile san trimer all isomers","name:styrene-acrylonitrile [san] trimer"],["styrene acrylonitrile san trimer thna isomer","cas:57964-39-3"],["styrene acrylonitrile san trimer thnp isomer","cas:57964-40-6"],["styrene divinylbenzene copolymer","cas:9003-70-7"],["styrene oxide","cas:96-09-3"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":14,"names":["Methylstyrene, Alpha-","Methyl Styrene (Mixed Isomers)","Styrene-Acrylonitrile (SAN) Trimer (THNA isomer)","Styrene-Acrylonitrile (SAN) Trimer (THNP isomer)"],"says":"14 rows share a parameter key with a longer name holding \"styrene\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"styrene\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":8,"offset":0,"returned":8,"next_offset":null,"rows":[{"id":"3f3af5807fd4daca","parameter":"Styrene","value":"100","value_num":100,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:100-42-5","place":["US-AK"],"conditions":["fresh water designated for water supply: drinking, culinary and food processing (18 AAC 70.020(b))"],"cite":{"instrument":"us_ak_wqs","title":"Alaska Water Quality Criteria Manual for Toxic and Other Deleterious Organic and Inorganic Substances (fresh and marine aquatic life, human health, water supply), with 18 AAC 70.020(b) dissolved inorganic substances and marine salinity","issuer":"State of Alaska, Department of Environmental Conservation","edition":"Toxics Manual as amended through September 8, 2022, adopted by reference in 18 AAC 70, as US EPA posts it in effect for CWA purposes (effective April 14, 2023; cover April 24, 2023); 18 AAC 70 as EPA 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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":"unchanged"},"section":null,"page":null,"quote":null,"table":"ssl","column":"mcl"}},{"id":"cf9d154787b155d7","parameter":"Styrene","value":"1200","value_num":1200,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:100-42-5","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 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base64; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}