{"permit":"SD0021920","name":"Volga, City of","state":"SD","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/SD0021920"},"about":[{"label":"What it is","text":"Sewage treatment plant"},{"label":"Where","text":"Volga, South Dakota","href":"https://www.openstreetmap.org/?mlat=44.3202780&mlon=-96.893972#map=14/44.3202780/-96.893972"},{"label":"Last 12 months","text":"Over a limit 7 times, last in August 2026 (Solids, suspended percent removal; pH). 7 of 11 reports filed late"},{"label":"Permit","text":"In force until Dec 31, 2028"}],"renewal_due":null,"renewal_check":null,"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":7,"over_by":[["Solids, suspended percent removal",5],["pH",2]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"pH","times":2,"find_limits":{"parameter":"ph","place":"US-SD","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=ph&place=US-SD&medium=surface_water"}],"limits":[{"outfall":"001","parameter":"Temperature, water deg. centigrade","parameter_code":"00010","statistic":"30-day average","qualifier":null,"value":null,"unit":"deg C","report_only":true,"enforceable":true,"months":"all","limit_set":"Any discharge to an unnamed tributary of the Big Sioux River from the constructed wetland cell"},{"outfall":"001","parameter":"Temperature, water deg. centigrade","parameter_code":"00010","statistic":"daily maximum","qualifier":null,"value":null,"unit":"deg C","report_only":true,"enforceable":true,"months":"all","limit_set":"Any discharge to an unnamed tributary of the Big Sioux River from the constructed wetland cell"},{"outfall":"001","parameter":"Flow rate","parameter_code":"00056","statistic":"30-day average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Any discharge to an unnamed tributary of the Big Sioux River from the constructed wetland cell"},{"outfall":"001","parameter":"Flow rate","parameter_code":"00056","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Any discharge to an unnamed tributary of the Big Sioux River from the constructed wetland cell"},{"outfall":"001","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"daily minimum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Any discharge to an unnamed tributary of the Big Sioux River from the constructed wetland cell"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. 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