{"query":{"parameter":"acrolein","place":"US-ID","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-ID","US"],"parameter_keys":["cas:107-02-8","cas:922-63-4"],"names_matched":[["acrolein","cas:107-02-8"],["2 ethyl acrolein","cas:922-63-4"]],"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":13,"offset":0,"returned":13,"next_offset":null,"rows":[{"id":"9780941022a1f504","parameter":"Acrolein","value":"3","value_num":3,"unit":"µg/L","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:107-02-8","place":["US-ID"],"conditions":["receiving_water is freshwater","surface waters designated for aquatic life use (cold water, salmonid spawning, seasonal cold water, warm water or modified; designations by water body unit in IDAPA 58.01.02.110-160)"],"cite":{"instrument":"us_id_wqs","title":"Idaho IDAPA 58.01.02 Water Quality Standards Section 210: numeric criteria for toxic substances for waters designated for aquatic life, recreation, or domestic water supply use; Section 250 aquatic life pH, dissolved gas and dissolved oxygen","issuer":"State of Idaho, Department of Environmental Quality","edition":"IDAPA 58.01.02 effective June 10, 2026, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/idwqs.pdf","source_sha256":"3097bd3c2e2328f792c1d9ad1287ae5caa7414d8370741ba339f72c9c8462654","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"IDAPA 58.01.02.210 Table 1","page":149,"quote":null}},{"id":"92be623cbeb9bf1d","parameter":"Acrolein","value":"3","value_num":3,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:107-02-8","place":["US-ID"],"conditions":["receiving_water is freshwater","surface waters designated for aquatic life use (cold water, salmonid spawning, seasonal cold water, warm water or modified; designations by water body unit in IDAPA 58.01.02.110-160)"],"cite":{"instrument":"us_id_wqs","title":"Idaho IDAPA 58.01.02 Water Quality Standards Section 210: numeric criteria for toxic substances for waters designated for aquatic life, recreation, or domestic water supply use; Section 250 aquatic life pH, dissolved gas and dissolved oxygen","issuer":"State of Idaho, Department of Environmental Quality","edition":"IDAPA 58.01.02 effective June 10, 2026, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/idwqs.pdf","source_sha256":"3097bd3c2e2328f792c1d9ad1287ae5caa7414d8370741ba339f72c9c8462654","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"IDAPA 58.01.02.210 Table 1","page":149,"quote":null}},{"id":"f30a516d3c1d25ba","parameter":"Acrolein","value":"3.2","value_num":3.2,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:107-02-8","place":["US-ID"],"conditions":["receiving_water is freshwater","surface waters designated for domestic water supply use (Table 2 'Water & Fish'; IDAPA 58.01.02.210.01.b)"],"cite":{"instrument":"us_id_wqs","title":"Idaho IDAPA 58.01.02 Water Quality Standards Section 210: numeric criteria for toxic substances for waters designated for aquatic life, recreation, or domestic water supply use; Section 250 aquatic life pH, dissolved gas and dissolved oxygen","issuer":"State of Idaho, Department of Environmental Quality","edition":"IDAPA 58.01.02 effective June 10, 2026, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/idwqs.pdf","source_sha256":"3097bd3c2e2328f792c1d9ad1287ae5caa7414d8370741ba339f72c9c8462654","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"IDAPA 58.01.02.210 Table 2","page":152,"quote":null}},{"id":"e2813ca6885cc265","parameter":"Acrolein","value":"120","value_num":120,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:107-02-8","place":["US-ID"],"conditions":["receiving_water is freshwater","surface waters designated for primary or secondary contact recreation use (Table 2 'Fish Only'; IDAPA 58.01.02.210.01.b)"],"cite":{"instrument":"us_id_wqs","title":"Idaho IDAPA 58.01.02 Water Quality Standards Section 210: numeric criteria for toxic substances for waters designated for aquatic life, recreation, or domestic water supply use; Section 250 aquatic life pH, dissolved gas and dissolved oxygen","issuer":"State of Idaho, Department of Environmental Quality","edition":"IDAPA 58.01.02 effective June 10, 2026, as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/idwqs.pdf","source_sha256":"3097bd3c2e2328f792c1d9ad1287ae5caa7414d8370741ba339f72c9c8462654","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"IDAPA 58.01.02.210 Table 2","page":152,"quote":null}},{"id":"779cea973349dd51","parameter":"Acrolein","value":"3","value_num":3,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:107-02-8","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 freshwater","Freshwater CMC (acute): criterion maximum concentration, acute"],"cite":{"instrument":"us_nrwqc_aquatic","title":"EPA National Recommended Water Quality Criteria — Aquatic Life Criteria Table (freshwater and saltwater CMC/CCC)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table, last updated on June 9, 2026 (fetched 2026-10-09); 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