{"permit":"MS0056995","name":"TVA MAGNOLIA COMBINED CYCLE","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/MS0056995"},"about":[{"label":"What it is","text":"Federal facility · Electric Services (EPA's industry listing) · rated a major discharger by EPA"},{"label":"Where","text":"Ashland, Mississippi","href":"https://www.openstreetmap.org/?mlat=34.810806&mlon=-89.239083#map=14/34.810806/-89.239083"},{"label":"Last 12 months","text":"No values over a limit"},{"label":"Permit","text":"In force until Apr 30, 2030"}],"renewal_due":null,"renewal_check":null,"sector":{"state":"MS","sic":"4911","permits":20,"list":"https://passage-data.com/api/v1/permits?state=MS&sic=4911","page":"https://passage-data.com/dmr/s/MS/4911"},"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":"pH","parameter_code":"00400","statistic":"daily minimum","qualifier":">=","value":"6","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"TOTAL FACILITY DISCHARGE"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"daily maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"TOTAL FACILITY DISCHARGE"},{"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":"TOTAL FACILITY DISCHARGE"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"TOTAL FACILITY DISCHARGE"},{"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":"TOTAL FACILITY DISCHARGE"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily maximum","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"TOTAL FACILITY DISCHARGE"},{"outfall":"001","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"TOTAL FACILITY DISCHARGE"},{"outfall":"001","parameter":"Temperature, summer [deg. 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fetch.","arguments":{"state":"MS","sic":"4911"},"needs":{},"get":"https://passage-data.com/api/v1/permits?state=MS&sic=4911","url":"https://passage-data.com/api/v1/permits?state=MS&sic=4911","page":"https://passage-data.com/dmr/s/MS/4911"},{"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":"MS0056995"},"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=MS0056995"},{"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":"MS0056995"},"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=MS0056995"}]}