{"permit":"MSP092488","name":"John C Stennis Center","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/MSP092488"},"about":[{"label":"What it is","text":"Space Research And Technology (EPA's industry listing)"},{"label":"Where","text":"Stennis Space Center, Mississippi","href":"https://www.openstreetmap.org/?mlat=30.383528&mlon=-89.601583#map=14/30.383528/-89.601583"},{"label":"Last 12 months","text":"No values over a limit"},{"label":"Permit","text":"In force until Jul 31, 2031"}],"renewal_due":null,"renewal_check":null,"sector":{"state":"MS","sic":"96","permits":9,"list":"https://passage-data.com/api/v1/permits?state=MS&sic=96","page":"https://passage-data.com/dmr/s/MS/96"},"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":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"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":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"pH","parameter_code":"00400","statistic":"minimum","qualifier":">=","value":"6","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"pH","parameter_code":"00400","statistic":"maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Cyanide, total [as CN]","parameter_code":"00720","statistic":"monthly average","qualifier":"<=","value":".65","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Cyanide, total [as CN]","parameter_code":"00720","statistic":"daily maximum","qualifier":"<=","value":"1.2","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Cyanide, total [as CN]","parameter_code":"00720","statistic":"monthly average","qualifier":"<=","value":".0041","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Cyanide, total [as CN]","parameter_code":"00720","statistic":"daily maximum","qualifier":"<=","value":".0075","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Nickel, total recoverable","parameter_code":"01074","statistic":"monthly average","qualifier":"<=","value":"2.38","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Nickel, total recoverable","parameter_code":"01074","statistic":"daily maximum","qualifier":"<=","value":"3.98","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Nickel, total recoverable","parameter_code":"01074","statistic":"monthly average","qualifier":"<=","value":".0149","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Nickel, total recoverable","parameter_code":"01074","statistic":"daily maximum","qualifier":"<=","value":".0249","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Silver total recoverable","parameter_code":"01079","statistic":"monthly average","qualifier":"<=","value":".24","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Silver total recoverable","parameter_code":"01079","statistic":"daily maximum","qualifier":"<=","value":".43","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Silver total recoverable","parameter_code":"01079","statistic":"monthly average","qualifier":"<=","value":".0015","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Silver total recoverable","parameter_code":"01079","statistic":"daily 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maximum","qualifier":"<=","value":".11","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Cadmium, total recoverable","parameter_code":"01113","statistic":"monthly average","qualifier":"<=","value":".004","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Cadmium, total recoverable","parameter_code":"01113","statistic":"daily maximum","qualifier":"<=","value":".0007","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Lead, total recoverable","parameter_code":"01114","statistic":"monthly average","qualifier":"<=","value":".43","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Lead, total recoverable","parameter_code":"01114","statistic":"daily maximum","qualifier":"<=","value":".69","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Lead, total recoverable","parameter_code":"01114","statistic":"monthly average","qualifier":"<=","value":".0027","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Lead, total recoverable","parameter_code":"01114","statistic":"daily maximum","qualifier":"<=","value":".0043","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Chromium, total recoverable","parameter_code":"01118","statistic":"monthly average","qualifier":"<=","value":"1.71","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Chromium, total recoverable","parameter_code":"01118","statistic":"daily maximum","qualifier":"<=","value":"2.77","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Chromium, total recoverable","parameter_code":"01118","statistic":"monthly 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Sanitary WW, Cooling Water and Internal Outfall 001"},{"outfall":"101","parameter":"Total toxic organics [TTO] [40 CFR433]","parameter_code":"78224","statistic":"daily maximum","qualifier":"<=","value":".0133","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"General Purpose, Sanitary WW, Cooling Water and Internal Outfall 001"}],"next":[{"tool":"list_permits","says":"Screening this industry? list_permits lists every permit of it in this state in one call, each with its page and its get_permit address; `get` is the address to fetch.","arguments":{"state":"MS","sic":"96"},"needs":{},"get":"https://passage-data.com/api/v1/permits?state=MS&sic=96","url":"https://passage-data.com/api/v1/permits?state=MS&sic=96","page":"https://passage-data.com/dmr/s/MS/96"},{"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":"MSP092488"},"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=MSP092488"},{"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":"MSP092488"},"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=MSP092488"}]}