{"query":{"parameter":"arsenic total","place":"US-MN","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MN","US"],"parameter_keys":["cas:7440-38-2","name:arsenic - total","name:arsenic, total","name:arsenic (+3)","name:arsenic iii","name:chemical oxygen demand, arsenic, radium (dissolved and total, uranium, zinc","name:arsenic, cadmium (h), copper (h), lead (h), mercury, zinc","name:arsenic, cadmium (h), copper (h), lead (h), zinc","name:arsenic, dissolved","name:arsenic extractible","name:arsenic v","name:total arsenic"],"names_matched":[["arsenic total","cas:7440-38-2"],["arsenic total","name:arsenic - total"],["arsenic total","name:arsenic, total"],["arsenic 3 total recoverable","name:arsenic (+3)"],["arsenic iii total recoverable","name:arsenic iii"],["chemical oxygen demand arsenic radium dissolved and total uranium zinc","name:chemical oxygen demand, arsenic, radium (dissolved and total, uranium, zinc"],["chemical oxygen demand arsenic radium dissolved and total uranium zinc h","name:chemical oxygen demand, arsenic, radium (dissolved and total, uranium, zinc"],["arsenic 3","name:arsenic (+3)","arsenic"],["arsenic cadmium h copper h lead h mercury zinc","name:arsenic, cadmium (h), copper (h), lead (h), mercury, zinc","arsenic"],["arsenic cadmium h copper h lead h mercury zinc h","name:arsenic, cadmium (h), copper (h), lead (h), mercury, zinc","arsenic"],["arsenic cadmium h copper h lead h zinc","name:arsenic, cadmium (h), copper (h), lead (h), zinc","arsenic"],["arsenic cadmium h copper h lead h zinc h","name:arsenic, cadmium (h), copper (h), lead (h), zinc","arsenic"],["arsenic dissolved","name:arsenic, dissolved","arsenic"],["arsenic dissolved trivalent","name:arsenic iii","arsenic"],["arsenic extractible","name:arsenic extractible","arsenic"],["arsenic iii","name:arsenic iii","arsenic"],["arsenic iii dissolved","name:arsenic iii","arsenic"],["arsenic trivalent","name:arsenic iii","arsenic"],["arsenic trivalent dissolved","name:arsenic iii","arsenic"],["arsenic v","name:arsenic v","arsenic"],["total arsenic","name:total arsenic","arsenic"],["total arsenic freshwater","name:total arsenic","arsenic"],["total arsenic marine","name:total arsenic","arsenic"]],"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":488,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"f6120217bb0c6ace","parameter":"Arsenic, total","value":"2.0","value_num":2,"unit":"µg/L","statistic":"monthly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:arsenic, total","place":["US-MN"],"conditions":["receiving_water is freshwater","class 2A waters: coldwater aquatic life and habitats, also protected as a source of drinking water (Minn. R. 7050.0222 subp. 2; each water's class is listed in 7050.0470)"],"cite":{"instrument":"us_mn_wqs","title":"Minnesota Rules ch. 7050 class 2 (2A, 2Bd, 2B/2D), class 4 and class 5 water quality standards, and ch. 7052 Lake Superior basin standards for GLI pollutants","issuer":"State of Minnesota, Pollution Control Agency","edition":"ch. 7050 as US EPA posts it in effect for CWA purposes (effective July 23, 2025; posting cover July 29, 2025), and ch. 7052 (effective June 26, 2018; Revisor publication 2017)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/mnwqs-chapter-7050.pdf","source_sha256":"1d4e781bf7b39a79bf6ea8ce64daaa05bb6c4bd5b04a98219d606ae88dbac150","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Minn. 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R. 7050.0222 subp. 2; each water's class is listed in 7050.0470)"],"cite":{"instrument":"us_mn_wqs","title":"Minnesota Rules ch. 7050 class 2 (2A, 2Bd, 2B/2D), class 4 and class 5 water quality standards, and ch. 7052 Lake Superior basin standards for GLI pollutants","issuer":"State of Minnesota, Pollution Control Agency","edition":"ch. 7050 as US EPA posts it in effect for CWA purposes (effective July 23, 2025; posting cover July 29, 2025), and ch. 7052 (effective June 26, 2018; Revisor publication 2017)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/mnwqs-chapter-7050.pdf","source_sha256":"1d4e781bf7b39a79bf6ea8ce64daaa05bb6c4bd5b04a98219d606ae88dbac150","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Minn. 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R. 7050.0222 subp. 2; each water's class is listed in 7050.0470)"],"cite":{"instrument":"us_mn_wqs","title":"Minnesota Rules ch. 7050 class 2 (2A, 2Bd, 2B/2D), class 4 and class 5 water quality standards, and ch. 7052 Lake Superior basin standards for GLI pollutants","issuer":"State of Minnesota, Pollution Control Agency","edition":"ch. 7050 as US EPA posts it in effect for CWA purposes (effective July 23, 2025; posting cover July 29, 2025), and ch. 7052 (effective June 26, 2018; Revisor publication 2017)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/mnwqs-chapter-7050.pdf","source_sha256":"1d4e781bf7b39a79bf6ea8ce64daaa05bb6c4bd5b04a98219d606ae88dbac150","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Minn. R. 7050.0222 subp. 2","page":106,"quote":"Arsenic, total​ μg/L​ 2.0​ HH​ 360​ 720​ Tox​"}},{"id":"9f684b4f7323c40e","parameter":"Arsenic, total","value":"2.0","value_num":2,"unit":"µg/L","statistic":"monthly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:arsenic, total","place":["US-MN"],"conditions":["receiving_water is freshwater","class 2Bd waters: cool or warm water aquatic life and habitats, also protected as a source of drinking water (Minn. R. 7050.0222 subp. 3)"],"cite":{"instrument":"us_mn_wqs","title":"Minnesota Rules ch. 7050 class 2 (2A, 2Bd, 2B/2D), class 4 and class 5 water quality standards, and ch. 7052 Lake Superior basin standards for GLI pollutants","issuer":"State of Minnesota, Pollution Control Agency","edition":"ch. 7050 as US EPA posts it in effect for CWA purposes (effective July 23, 2025; posting cover July 29, 2025), and ch. 7052 (effective June 26, 2018; Revisor publication 2017)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/mnwqs-chapter-7050.pdf","source_sha256":"1d4e781bf7b39a79bf6ea8ce64daaa05bb6c4bd5b04a98219d606ae88dbac150","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Minn. 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R. 7050.0222 subp. 3)"],"cite":{"instrument":"us_mn_wqs","title":"Minnesota Rules ch. 7050 class 2 (2A, 2Bd, 2B/2D), class 4 and class 5 water quality standards, and ch. 7052 Lake Superior basin standards for GLI pollutants","issuer":"State of Minnesota, Pollution Control Agency","edition":"ch. 7050 as US EPA posts it in effect for CWA purposes (effective July 23, 2025; posting cover July 29, 2025), and ch. 7052 (effective June 26, 2018; Revisor publication 2017)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/mnwqs-chapter-7050.pdf","source_sha256":"1d4e781bf7b39a79bf6ea8ce64daaa05bb6c4bd5b04a98219d606ae88dbac150","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Minn. 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R. 7050.0222 subp. 4); class 2D wetlands take these standards save dissolved oxygen, pH, temperature and chloride (subp. 6)"],"cite":{"instrument":"us_mn_wqs","title":"Minnesota Rules ch. 7050 class 2 (2A, 2Bd, 2B/2D), class 4 and class 5 water quality standards, and ch. 7052 Lake Superior basin standards for GLI pollutants","issuer":"State of Minnesota, Pollution Control Agency","edition":"ch. 7050 as US EPA posts it in effect for CWA purposes (effective July 23, 2025; posting cover July 29, 2025), and ch. 7052 (effective June 26, 2018; Revisor publication 2017)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/mnwqs-chapter-7050.pdf","source_sha256":"1d4e781bf7b39a79bf6ea8ce64daaa05bb6c4bd5b04a98219d606ae88dbac150","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Minn. 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