{"permit":"IN0022578","name":"CHESTERTON WWTP, TOWN OF","state":"IN","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/IN0022578"},"about":[{"label":"What it is","text":"Sewage treatment plant · rated a major discharger by EPA"},{"label":"Where","text":"Chesterton, Indiana","href":"https://www.openstreetmap.org/?mlat=41.619167&mlon=-87.063889#map=14/41.619167/-87.063889"},{"label":"Last 12 months","text":"No values over a limit"},{"label":"Permit","text":"In force until Oct 31, 2029"}],"renewal_due":null,"renewal_check":null,"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":0,"over_by":[],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"001","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"daily average 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