{"permit":"MS0044164","name":"COLUMBIA POTW, SOUTH","state":"MS","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/MS0044164"},"about":[{"label":"What it is","text":"Sewage treatment plant · rated a major discharger by EPA"},{"label":"Where","text":"Columbia, Mississippi","href":"https://www.openstreetmap.org/?mlat=31.233028&mlon=-89.816222#map=14/31.233028/-89.816222"},{"label":"Last 12 months","text":"Over a limit 2 times, last in June 2026 (Solids, suspended percent removal). 53 required values not reported. 5 of 13 reports filed late"},{"label":"Permit","text":"In force until Sep 30, 2029"}],"renewal_due":null,"renewal_check":null,"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-07-31","over":2,"over_by":[["Solids, suspended percent removal",2]],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"001","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"minimum","qualifier":">=","value":"6","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"monthly average","qualifier":"<=","value":"45","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"maximum weekly average","qualifier":"<=","value":"65","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"monthly average","qualifier":"<=","value":"552","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"maximum weekly average","qualifier":"<=","value":"797","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"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":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"minimum","qualifier":">=","value":"6","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":"<=","value":"90","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum weekly average","qualifier":"<=","value":"135","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":"<=","value":"1103","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum weekly average","qualifier":"<=","value":"1655","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"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":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"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":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"monthly average","qualifier":"<=","value":"141.08","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"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":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"monthly average","qualifier":"<=","value":"33.81","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Zinc, total recoverable","parameter_code":"01094","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Zinc, total recoverable","parameter_code":"01094","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Lead, total recoverable","parameter_code":"01114","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Lead, total recoverable","parameter_code":"01114","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Copper, total recoverable","parameter_code":"01119","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Copper, total recoverable","parameter_code":"01119","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly average","qualifier":"<=","value":"1.47","unit":"MGD","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"maximum weekly average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"maximum weekly average","qualifier":"<=","value":"1","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"monthly average","qualifier":"<=","value":"126","unit":"#/100mL","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"maximum weekly average","qualifier":"<=","value":"410","unit":"#/100mL","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, percent removal","parameter_code":"81010","statistic":"minimum","qualifier":">=","value":"65","unit":"%","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"Solids, suspended percent removal","parameter_code":"81011","statistic":"minimum","qualifier":">=","value":"65","unit":"%","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"%Effect Static Renewal 48Hr Acute Ceriodaphnia dubia","parameter_code":"TCM3B","statistic":"minimum","qualifier":">=","value":".03","unit":"%","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"},{"outfall":"001","parameter":"%Effect Static Renewal 96Hr Acute Pimephales promelas","parameter_code":"TCN6C","statistic":"minimum","qualifier":">=","value":".3","unit":"%","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC WASTEWATER"}],"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":"MS0044164"},"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=MS0044164"},{"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":"MS0044164"},"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 text."},"post":"/api/v1/dmr/fill","url":"https://passage-data.com/api/v1/dmr/fill","page":"https://passage-data.com/dmr/?permit=MS0044164"}]}