{"permit":"DE0020320","name":"City of Wilmington Regional WWTP","state":"DE","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/DE0020320"},"about":[{"label":"What it is","text":"Sewage treatment plant · rated a major discharger by EPA"},{"label":"Where","text":"Wilmington, Delaware","href":"https://www.openstreetmap.org/?mlat=39.735962&mlon=-75.516033#map=14/39.735962/-75.516033"},{"label":"Last 12 months","text":"No values over a limit"},{"label":"Permit","text":"Expired Sep 30, 2019; 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":"2019-04-03","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/DE0020320#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":"2026-07-31","over":0,"over_by":[],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"daily minimum","qualifier":">=","value":"6","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"daily maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily average","qualifier":"<=","value":"20","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily 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