{"state":"MT","as_of":"2026-10-16","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-16","page":"/dmr/p/MT","listed":"individual NPDES permits with limits in EPA's file; a general permit's coverages are not listed"},"filter":{"industry":null,"sic":null,"matched_on":"EPA's primary SIC code and its description","over_limit":null,"parameter":null,"renewal":null,"upcoming":true,"facility_type":null,"min_flow_mgd":null},"of":151,"without_industry":0,"matched":1,"offset":0,"returned":1,"screen":{"of":151,"window":["2025-10-01","2026-09-30"],"with_record":151,"without_record":0,"over_limit":58,"missing_values":28,"parameters_over":[{"parameter":"Solids, total suspended","permits":20},{"parameter":"BOD, 5-day, 20 deg. C","permits":15},{"parameter":"Solids, suspended percent removal","permits":11},{"parameter":"pH","permits":10},{"parameter":"E. coli, MTEC-MF","permits":8},{"parameter":"BOD, 5-day, percent removal","permits":6},{"parameter":"Nitrogen, ammonia total [as N]","permits":6},{"parameter":"E. coli","permits":5},{"parameter":"Nitrogen, total [as N]","permits":4},{"parameter":"Copper, total recoverable","permits":3},{"parameter":"Phosphorus, total [as P]","permits":3},{"parameter":"Zinc, total recoverable","permits":3},{"parameter":"Aluminum, dissolved [as Al]","permits":2},{"parameter":"Coliform, fecal general","permits":2},{"parameter":"Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas","permits":2},{"parameter":"Arsenic, total recoverable","permits":1},{"parameter":"BOD, carbonaceous [5 day, 20 C]","permits":1},{"parameter":"BOD, carbonaceous, percent removal","permits":1},{"parameter":"Chlorine, total residual","permits":1},{"parameter":"Iron, total [as Fe]","permits":1}],"parameters_over_more":9,"renewal":{"permit_expired":99,"application_overdue":15,"application_due_within_18_months":22},"upcoming":1,"upcoming_above_today":1,"says":"Of the 151 permits listed in MT, 58 went over a limit between 2025-10-01 and 2026-09-30 (Solids, total suspended: 20; BOD, 5-day, 20 deg. C: 15; Solids, suspended percent removal: 11). 99 are past the expiry date EPA's file holds; 37 have a renewal application overdue or due within 18 months; 1 has a new or tighter limit taking effect later, 1 already reporting above it today. EPA's file of 2026-10-16.","narrow":{"over_limit":"https://passage-data.com/api/v1/permits?state=MT&over_limit=true","parameter":{"Solids, total suspended":"https://passage-data.com/api/v1/permits?state=MT&parameter=Solids%2C+total+suspended","BOD, 5-day, 20 deg. C":"https://passage-data.com/api/v1/permits?state=MT&parameter=BOD%2C+5-day%2C+20+deg.+C","Solids, suspended percent removal":"https://passage-data.com/api/v1/permits?state=MT&parameter=Solids%2C+suspended+percent+removal","pH":"https://passage-data.com/api/v1/permits?state=MT&parameter=pH","E. coli, MTEC-MF":"https://passage-data.com/api/v1/permits?state=MT&parameter=E.+coli%2C+MTEC-MF"},"renewal_expired":"https://passage-data.com/api/v1/permits?state=MT&renewal=expired","renewal_due":"https://passage-data.com/api/v1/permits?state=MT&renewal=due"}},"permits":[{"permit":"MT0026808","name":"STILLWATER MINING COMPANY                                                       ","major":false,"sic":"1099","industry":"Metal Ores","record":{"over":2,"over_by":[["Mercury, total recoverable",2]],"missing":0},"expires":"2028-08-31","renewal":{"status":"application_due_within_18_months","application_due":"2028-03-04"},"design_flow_mgd":null,"facility_type":"NON-POTW","upcoming":[{"parameter":"Nitrogen, total [as N]","outfall":"002","limit":10.8,"unit":"lb/d","statistic":"monthly average","statistic_code":"MK","begin":"2027-09-01","kind":"new","now":{"median":1.96,"n":10},"times_limit":0.181},{"parameter":"Copper, total recoverable","outfall":"002","limit":1.21,"unit":"ug/L","statistic":"daily maximum","statistic_code":"DD","begin":"2028-08-01","kind":"new","now":null},{"parameter":"Copper, total recoverable","outfall":"002","limit":0.63,"unit":"ug/L","statistic":"monthly average","statistic_code":"MK","begin":"2028-08-01","kind":"new","now":{"median":2,"n":10,"below_detection":4},"times_limit":3.17}],"page":"https://passage-data.com/dmr/p/MT0026808","json":"https://passage-data.com/api/v1/permits/MT0026808"}]}