{"query":{"parameter":"carbon","place":"US-VA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-VA","US"],"parameter_keys":["cas:7440-44-0","name:carbon-14","name:carbon-14a","cas:1333-86-4","cas:64742-90-1","cas:75-15-0","cas:630-08-0","cas:56-23-5","cas:75-73-0","name:organic carbon","name:toc","name:total organic carbon"],"names_matched":[["carbon","cas:7440-44-0"],["carbon 14","name:carbon-14"],["carbon 14a","name:carbon-14a"],["carbon black","cas:1333-86-4"],["carbon black oil","cas:64742-90-1"],["carbon disulfide","cas:75-15-0"],["carbon monoxide","cas:630-08-0"],["carbon monoxide co","cas:630-08-0"],["carbon tetrachloride","cas:56-23-5"],["carbon tetrachloride tetra chloromethane","cas:56-23-5"],["carbon tetrachloride tetrachloromethane","cas:56-23-5"],["carbon tetrafluoride","cas:75-73-0"],["organic carbon","name:organic carbon"],["organic carbon dissolved","name:organic carbon"],["organic carbon total","name:organic carbon"],["tetrachloromethane carbon tetrachloride","cas:56-23-5"],["total organic carbon","name:toc"],["total organic carbon","name:total organic carbon"],["total organic carbon toc","name:toc"],["total organic carbon toc","name:total organic carbon"],["carbone disulfure de","cas:75-15-0","carbone"],["carbone monoxyde de","cas:630-08-0","carbone"],["carbone noir de","cas:1333-86-4","carbone"],["carbone organique total","name:toc","carbone"],["carbone organique total","name:total organic carbon","carbone"],["carbone organique total cot","name:toc","carbone"],["carbone organique total cot","name:total organic carbon","carbone"],["monoxyde de carbone","cas:630-08-0","carbone"],["tetrachlorure de carbone","cas:56-23-5","carbone"],["tetrachlorure de carbone tetrachloromethane","cas:56-23-5","carbone"],["tetrafluorure de carbone","cas:75-73-0","carbone"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":34,"names":["Carbon Tetrachloride","Carbon Disulfide","carbon monoxide","Carbon tetrachloride","Carbon disulfide","TOC"],"says":"34 rows share a parameter key with a longer name holding \"carbon\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"carbon\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":2,"offset":0,"returned":2,"next_offset":null,"rows":[{"id":"88acb6a2ddd968af","parameter":"Carbon","value":"4.0","value_num":4,"direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-44-0","place":["US-VA"],"conditions":["segments designated PWS (public water supply) in 9VAC25-260-390 through 9VAC25-260-540"],"cite":{"instrument":"us_va_wqs","title":"9VAC25-260-140 — Criteria for surface water (Virginia Water Quality Standards), Table of Parameters","issuer":"Commonwealth of Virginia, State Water Control Board (Department of Environmental Quality)","edition":"Virginia Administrative Code as served by the General Assembly's LIS on 2026-10-09; last amended Virginia Register Volume 40, Issue 24, eff. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"9VAC25-260-140 B, Table of Parameters (human health, public water supply)","page":null,"quote":"Carbon tetrachloride (µg/l) 56235 Known or suspected carcinogen; human health criteria at risk level 10 -5 . 4.0 50"}},{"id":"0b440af259092b61","parameter":"Carbon","value":"50","value_num":50,"direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-44-0","place":["US-VA"],"conditions":["all other surface waters, not designated PWS in 9VAC25-260-390 through 9VAC25-260-540"],"cite":{"instrument":"us_va_wqs","title":"9VAC25-260-140 — Criteria for surface water (Virginia Water Quality Standards), Table of Parameters","issuer":"Commonwealth of Virginia, State Water Control Board (Department of Environmental Quality)","edition":"Virginia Administrative Code as served by the General Assembly's LIS on 2026-10-09; last amended Virginia Register Volume 40, Issue 24, eff. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"9VAC25-260-140 B, Table of Parameters (human health, all other surface waters)","page":null,"quote":"Carbon tetrachloride (µg/l) 56235 Known or suspected carcinogen; human health criteria at risk level 10 -5 . 4.0 50"}}],"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-VA"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"carbon\", 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-VA"},"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"}]}