{"query":{"parameter":"p xylene","place":"US-MT","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MT","US"],"parameter_keys":["cas:106-42-3","cas:1758-88-9","cas:1330-20-7","name:xylene, total m,p,o"],"names_matched":[["p xylene","cas:106-42-3"],["2 ethyl p xylene","cas:1758-88-9"],["xylenes mixed isomers sum of o m and p xylene concentrations","cas:1330-20-7"],["xylene o m p","cas:1330-20-7","xylene p"],["xylene total m p o","name:xylene, total m,p,o","xylene p"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":16,"names":["Xylenes","Xylenes-mixed isomers (sum of o-, m-, and p-xylene concentrations)","Xylenes (total)","Xylenes, total"],"says":"16 rows share a parameter key with a longer name holding \"p xylene\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"p xylene\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":5,"offset":0,"returned":5,"next_offset":null,"rows":[{"id":"29fc7bcf34e27f94","parameter":"p-Xylene","value":"1x104 MCL","value_num":10000,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:106-42-3","place":["US-MT"],"conditions":["receiving_water is freshwater","Montana surface waters (human health surface water standard: water and fish consumption, 2.4 L and 22 g/day)"],"cite":{"instrument":"us_mt_wqs","title":"Montana Circular DEQ-7 Numeric Water Quality Standards: aquatic life acute and chronic and human health surface water standards; footnote (15) dissolved oxygen","issuer":"State of Montana, Department of Environmental Quality (Water Quality Division)","edition":"Circular DEQ-7, June 2019, as US EPA posts it in effect for CWA purposes (cover April 7, 2020; last EPA action April 23, 2018)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/mt-deq7.pdf","source_sha256":"beda1c7ee072086eaa2da108a4d3432ea613a1f7477fd3e008755c4834ff6dd8","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Circular DEQ-7 (June 2019)","page":60,"quote":null}},{"id":"eafca1cc48856854","parameter":"Xylene, p-","value":"560","value_num":560,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:106-42-3","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":"unchanged"},"section":null,"page":null,"quote":null,"table":"sols","column":"residentiel"}},{"id":"048d1701ee3f1ab9","parameter":"Xylene, p-","value":"2400","value_num":2400,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:106-42-3","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":"unchanged"},"section":null,"page":null,"quote":null,"table":"sols","column":"industriel"}},{"id":"908355861d44aa0c","parameter":"Xylene, p-","value":"0.19","value_num":0.19,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:106-42-3","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":"unchanged"},"section":null,"page":null,"quote":null,"table":"ssl","column":"risque"}},{"id":"7ec7e993ee9ef682","parameter":"Xylene, p-","value":"190","value_num":190,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:106-42-3","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":"unchanged"},"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-MT"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"p xylene\", 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-MT"},"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"}]}