{"permit":"WI0024597","name":"MADISON METROPOLITAN SEWERAGE","state":"WI","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/WI0024597"},"about":[{"label":"What it is","text":"Sewage treatment plant · rated a major discharger by EPA"},{"label":"Where","text":"Madison, Wisconsin","href":"https://www.openstreetmap.org/?mlat=43.035556&mlon=-89.356667#map=14/43.035556/-89.356667"},{"label":"Last 12 months","text":"Over a limit once, last in April 2026 (Oxygen, dissolved [DO]). 193 required values not reported. 22 of 33 reports filed late"},{"label":"Permit","text":"Expired Sep 30, 2015; 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":"2015-04-03","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/WI0024597#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":"2026-06-30","over":1,"over_by":[["Oxygen, dissolved [DO]",1]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Oxygen, dissolved [DO]","times":1,"find_limits":{"parameter":"dissolved oxygen","place":"US-WI","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=dissolved+oxygen&place=US-WI&medium=surface_water"}],"limits":[{"outfall":"001","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"daily minimum","qualifier":">=","value":"5","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"EFFL/BADFISH CR"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. 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