{"permit":"MO0085472","name":"DCSD Treatment Plant 1","state":"MO","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/MO0085472"},"about":[{"label":"What it is","text":"Sewage treatment plant · rated a major discharger by EPA"},{"label":"Where","text":"St. Charles, Missouri","href":"https://www.openstreetmap.org/?mlat=38.7248302&mlon=-90.546162#map=14/38.7248302/-90.546162"},{"label":"Last 12 months","text":"No values over a limit"},{"label":"Permit","text":"Expired Jun 30, 2021; 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":"2021-01-01","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/MO0085472#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":"2026-09-30","over":0,"over_by":[],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"weekly average","qualifier":"<=","value":"45","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"monthly average","qualifier":"<=","value":"30","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Influent Monitoring"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"minimum","qualifier":">=","value":"6.5","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"weekly average","qualifier":"<=","value":"45","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":"<=","value":"30","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Influent Monitoring"},{"outfall":"001","parameter":"Oil and grease [soxhlet extr.] tot.","parameter_code":"00550","statistic":"daily maximum","qualifier":"<=","value":"15","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"Oil and grease [soxhlet extr.] tot.","parameter_code":"00550","statistic":"monthly average","qualifier":"<=","value":"10","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly TP and TN"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly TP and TN"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"12.1","unit":"mg/L","report_only":false,"enforceable":true,"months":["JAN","FEB","MAR","OCT","NOV","DEC"],"limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily 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recoverable","parameter_code":"01119","statistic":"monthly average","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Twice per Year hardness and metals"},{"outfall":"001","parameter":"Chromium, hexavalent dissolved [as Cr]","parameter_code":"01220","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Twice per Year hardness and metals"},{"outfall":"001","parameter":"Chromium, hexavalent dissolved [as Cr]","parameter_code":"01220","statistic":"monthly average","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Twice per Year hardness and metals"},{"outfall":"001","parameter":"Chromium, trivalent total recoverable","parameter_code":"04262","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Twice per 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mean","qualifier":"<=","value":"1030","unit":"#/100mL","report_only":false,"enforceable":true,"months":["APR","MAY","JUN","JUL","AUG","SEP","OCT"],"limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"30-day geometric mean","qualifier":"<=","value":"206","unit":"#/100mL","report_only":false,"enforceable":true,"months":["APR","MAY","JUN","JUL","AUG","SEP","OCT"],"limit_set":"Monthly, daily, weekly, twice per week"},{"outfall":"001","parameter":"Toxicity [acute], Ceriodaphnia dubia","parameter_code":"61425","statistic":"daily maximum","qualifier":null,"value":null,"unit":"toxic","report_only":true,"enforceable":true,"months":"all","limit_set":"WET test - Acute"},{"outfall":"001","parameter":"Toxicity [acute], Pimephales promelas [Fathead Minnow]","parameter_code":"61427","statistic":"daily maximum","qualifier":null,"value":null,"unit":"toxic","report_only":true,"enforceable":true,"months":"all","limit_set":"WET test - Acute"}],"next":[{"tool":"check_dmr","says":"Before your user files this permit's DMR: check_dmr sets each value beside the permit's limit for that period, with EPA's violation rule's verdict.","arguments":{"permit":"MO0085472"},"needs":{"period_end":"The reporting period: its month (2026-09).","values":"The period's values as your user will file them: [{outfall, parameter, statistic, value, unit}, ...]."},"post":"/api/v1/dmr/check","url":"https://passage-data.com/api/v1/dmr/check","page":"https://passage-data.com/dmr/?permit=MO0085472"},{"tool":"fill_dmr","says":"Has your user the plant's raw daily results? fill_dmr computes the period's DMR values from them, each with the rows it came from.","arguments":{"permit":"MO0085472"},"needs":{"period_end":"The reporting period: its month (2026-09).","rows":"The plant's results: [{date, parameter, value, unit, point}, ...]; or `table`, the lab's or plant's export as 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