{"query":{"parameter":"isophorone","place":"US-TN","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-TN","US"],"parameter_keys":["cas:78-59-1","cas:4098-71-9","cas:53880-05-0","cas:2855-13-2","cas:55954-19-3"],"names_matched":[["isophorone","cas:78-59-1"],["diisocyanate d isophorone","cas:4098-71-9"],["homopolymere de diisocyanate d isophorone","cas:53880-05-0"],["isophorone diamine","cas:2855-13-2"],["isophorone diaminea","cas:2855-13-2"],["isophorone diisocyanate","cas:4098-71-9"],["isophorone diisocyanate caprolactam adduct 1 2","cas:55954-19-3"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order; rows for a marine receiving water after the rest, as none of the place's own rows names a marine, salt, estuarine, coastal or ocean water"},"total":9,"offset":0,"returned":9,"next_offset":null,"rows":[{"id":"28a1e338ea049149","parameter":"Isophorone","value":"350","value_num":350,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:78-59-1","place":["US-TN"],"conditions":["receiving_water is freshwater","waters designated for both recreation and domestic water supply (Rule 0400-40-03-.03(4)(j), note 1)"],"cite":{"instrument":"us_tn_wqs","title":"Tennessee Rule 0400-40-03-.03 Criteria for Water Uses (Chapter 0400-40-03 General Water Quality Criteria): domestic water supply, fish and aquatic life (CMC/CCC) and recreation human health criteria; TDS, dissolved oxygen and pH","issuer":"State of Tennessee, Department of Environment and Conservation (Board of Water Quality, Oil, and Gas)","edition":"Chapter 0400-40-03 as revised March 2024 (amendments filed December 18, 2023, effective March 17, 2024), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/system/files/documents/2024-07/tn_wqs_0011_062024.pdf","source_sha256":"4c9ee91b2941f44106d7cbb5009fe40f470c0c530b183b399370ce4567242717","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Rule 0400-40-03-.03(4)(j)","page":14,"quote":"Isophorone (c) 350 9600"}},{"id":"312ff51851cbfc87","parameter":"Isophorone","value":"9600","value_num":9600,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:78-59-1","place":["US-TN"],"conditions":["receiving_water is freshwater","waters designated for recreation (Rule 0400-40-03-.03(4))"],"cite":{"instrument":"us_tn_wqs","title":"Tennessee Rule 0400-40-03-.03 Criteria for Water Uses (Chapter 0400-40-03 General Water Quality Criteria): domestic water supply, fish and aquatic life (CMC/CCC) and recreation human health criteria; 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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":"f5cfdd61fa4c3284","parameter":"Isophorone","value":"78","value_num":78,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:78-59-1","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"}},{"id":"1ac605136cc8585e","parameter":"Isophorone","value":"1,800","value_num":1800,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:78-59-1","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is marine","consumption of organism only: a water designated for fish and shellfish taken from it, not a drinking-water source (fresh or salt)"],"cite":{"instrument":"us_nrwqc_human_health","title":"EPA National Recommended Water Quality Criteria — Human Health Criteria Table (water + organism, organism only)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table (fetched 2026-10-09); 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or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}