{"permit":"SD0020966","name":"Salem, 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/SD0020966"},"about":[{"label":"What it is","text":"Sewage treatment plant"},{"label":"Where","text":"Salem, South Dakota","href":"https://www.openstreetmap.org/?mlat=43.7239400&mlon=-97.406200#map=14/43.7239400/-97.406200"},{"label":"Last 12 months","text":"Over a limit once, last in April 2026 (Nitrogen, ammonia total [as N]). 2 of 11 reports filed late"},{"label":"Permit","text":"Expired Jun 30, 2024; its limits still apply until a new permit is issued, and EPA still expects the reports"}],"renewal_due":null,"renewal_check":{"offered_because":"permit_expired","application_due":"2024-01-02","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/SD0020966#renewal","says":"Each limit a renewal could tighten or add, from the state's water-quality standards and the federal rules for this kind of discharge, each cited to its rule, beside EPA's 12-month record; a rule we do not hold is named, never guessed. A person orders it on the permit's page with their email; it is sent by email within 5 business days."},"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":1,"over_by":[["Nitrogen, ammonia total [as N]",1]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Nitrogen, ammonia total [as N]","times":1,"find_limits":{"parameter":"ammonia","place":"US-SD","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=ammonia&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 from the discharge line form Cells 2 or 3 to Snake Creek."},{"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 from the discharge line form Cells 2 or 3 to Snake Creek."},{"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 from the discharge line form Cells 2 or 3 to Snake Creek."},{"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 from the discharge line form Cells 2 or 3 to Snake Creek."},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. 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