{"query":{"parameter":"styrene","place":"US-MD","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MD","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":7,"offset":0,"returned":7,"next_offset":null,"rows":[{"id":"830862d783f0f0c3","parameter":"Styrene","value":"0.1","value_num":0.1,"unit":"mg/l","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:100-42-5","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level goals are nonenforceable health goals."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"141.50, 141.61","page":null,"quote":null,"column":"mclg"}},{"id":"539bc9e238e89d5f","parameter":"Styrene","value":"0.1","value_num":0.1,"unit":"mg/l","direction":"max","kind":"limit","medium":"drinking_water","level":"national","parameter_key":"cas:100-42-5","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"141.50, 141.61","page":null,"quote":null,"column":"mcl"}},{"id":"b29789c3fad3b355","parameter":"Styrene","value":"6000","value_num":6000,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:100-42-5","place":["US"],"conditions":["Resident Soil (mg/kg)"],"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":"sols","column":"residentiel"}},{"id":"82ea8e16ade1729a","parameter":"Styrene","value":"35000","value_num":35000,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:100-42-5","place":["US"],"conditions":["Industrial Soil (mg/kg)"],"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":"sols","column":"industriel"}},{"id":"d896c579075d9d49","parameter":"Styrene","value":"1.3","value_num":1.3,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:100-42-5","place":["US"],"conditions":["Protection of Groundwater SSLs: Risk-based SSL (mg/kg); 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":"4c9afc18f6454f42","parameter":"Styrene","value":"0.11","value_num":0.11,"unit":"mg/kg","direction":"max","kind":"printed_reference","medium":"soil","level":"national","parameter_key":"cas:100-42-5","place":["US"],"conditions":["Protection of Groundwater SSLs: MCL-based SSL (mg/kg); 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":"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 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-MD"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"styrene\", 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-MD"},"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"}]}