{"permit":"MS0052574","name":"HARRISON CO UTILITY AUTHORITY, DELISLE WASTEWATER TREATMENT FACILITY","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/MS0052574"},"about":[{"label":"What it is","text":"Sewage treatment plant"},{"label":"Where","text":"Pass Christian, Mississippi","href":"https://www.openstreetmap.org/?mlat=30.395778&mlon=-89.260111#map=14/30.395778/-89.260111"},{"label":"Last 12 months","text":"Over a limit 6 times, last in September 2026 (Nitrogen, ammonia total [as N]; BOD, 5-day, 20 deg. C)"},{"label":"Permit","text":"In force until May 31, 2031"}],"renewal_due":null,"renewal_check":null,"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-09-30","over":6,"over_by":[["Nitrogen, ammonia total [as N]",4],["BOD, 5-day, 20 deg. C",2]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Nitrogen, ammonia total [as N]","times":4,"find_limits":{"parameter":"ammonia","place":"US-MS","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=ammonia&place=US-MS&medium=surface_water"},{"parameter":"BOD, 5-day, 20 deg. C","times":2,"find_limits":{"parameter":"bod","place":"US-MS","medium":"water_discharge"},"get":"https://passage-data.com/api/v1/limits?parameter=bod&place=US-MS&medium=water_discharge"}],"upcoming":[{"parameter":"Nitrogen, ammonia total [as N]","outfall":"001","limit":9,"unit":"lb/d","statistic":"maximum monthly average","statistic_code":"M2","begin":"2029-06-22","kind":"tighter","now":{"median":2.655,"n":4},"times_limit":0.295},{"parameter":"Nitrogen, ammonia total [as N]","outfall":"001","limit":1.37,"unit":"ug/L","statistic":"maximum monthly average","statistic_code":"M2","begin":"2029-06-22","kind":"tighter","now":{"median":1266,"n":4},"times_limit":924},{"parameter":"Nitrogen, ammonia total [as N]","outfall":"001","limit":2,"unit":"ug/L","statistic":"maximum weekly average","statistic_code":"MS","begin":"2029-06-22","kind":"tighter","now":{"median":2335,"n":4},"check":"EPA's file prints a value here that no written limit or plant report supports (a nutrient limit under 0.0005 mg/L, a unit the parameter is not measured in, or today's median over 1000 times the limit): read the permit before relying on it"},{"parameter":"Nitrogen, ammonia total [as N]","outfall":"001","limit":13,"unit":"lb/d","statistic":"maximum weekly average","statistic_code":"MS","begin":"2029-06-22","kind":"tighter","now":{"median":2.656,"n":4},"times_limit":0.204}],"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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"minimum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"maximum monthly average","qualifier":"<=","value":"10","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"maximum weekly average","qualifier":"<=","value":"15","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"maximum monthly average","qualifier":"<=","value":"67","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"maximum weekly average","qualifier":"<=","value":"100","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL 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/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"minimum","qualifier":null,"value":null,"unit":"SU","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"maximum","qualifier":null,"value":null,"unit":"SU","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum monthly average","qualifier":"<=","value":"30","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum weekly average","qualifier":"<=","value":"45","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum monthly average","qualifier":"<=","value":"200","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum weekly average","qualifier":"<=","value":"300","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"maximum monthly average","qualifier":"<=","value":"2","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"maximum weekly average","qualifier":"<=","value":"3","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"maximum monthly average","qualifier":"<=","value":"13","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"maximum weekly average","qualifier":"<=","value":"20","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"maximum monthly average","qualifier":null,"value":null,"unit":"lb/d","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"maximum monthly average","qualifier":"<=","value":".8","unit":"MGD","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"maximum monthly average","qualifier":"<=","value":".011","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"maximum weekly average","qualifier":"<=","value":".019","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"maximum monthly average","qualifier":"<=","value":"126","unit":"#/100mL","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL 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/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"BOD, 5-day, percent removal","parameter_code":"81010","statistic":"minimum","qualifier":">=","value":"85","unit":"%","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Solids, suspended percent removal","parameter_code":"81011","statistic":"minimum","qualifier":">=","value":"85","unit":"%","report_only":false,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Sludge settleability 30 minute","parameter_code":"82219","statistic":"minimum","qualifier":null,"value":null,"unit":"mL/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"},{"outfall":"001","parameter":"Sludge settleability 30 minute","parameter_code":"82219","statistic":"maximum","qualifier":null,"value":null,"unit":"mL/L","report_only":true,"enforceable":true,"months":"all","limit_set":"DOMESTIC/MUNICIPAL WASTEWATER"}],"next":[{"tool":"find_limits","says":"What do the rules say about what it went over on? find_limits gives the cited state and federal limits for it, each with its rule; `get` is the address to fetch, and `over_limits` holds one for each parameter.","arguments":{"parameter":"ammonia","place":"US-MS","medium":"surface_water"},"needs":{},"get":"https://passage-data.com/api/v1/limits?parameter=ammonia&place=US-MS&medium=surface_water","url":"https://passage-data.com/api/v1/limits?parameter=ammonia&place=US-MS&medium=surface_water","page":"https://passage-data.com/limits/US-MS/ammonia"},{"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":"MS0052574"},"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=MS0052574"},{"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":"MS0052574"},"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=MS0052574"}]}