{"permit":"MT0030759","name":"City of Hardin Wastewater Treatment Facility","state":"MT","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/MT0030759"},"about":[{"label":"What it is","text":"Sewage treatment plant · rated a major discharger by EPA"},{"label":"Where","text":"Hardin, Montana","href":"https://www.openstreetmap.org/?mlat=45.734722&mlon=-107.580278#map=14/45.734722/-107.580278"},{"label":"Last 12 months","text":"Over a limit once, last in October 2025 (E. coli)"},{"label":"Permit","text":"In force until Nov 30, 2028"}],"renewal_due":null,"renewal_check":null,"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":1,"over_by":[["E. coli",1]],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"001","parameter":"Temperature, water deg. centigrade","parameter_code":"00010","statistic":"30-day average","qualifier":null,"value":null,"unit":"deg C","report_only":true,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Temperature, water deg. centigrade","parameter_code":"00010","statistic":"daily maximum","qualifier":null,"value":null,"unit":"deg C","report_only":true,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"30-day average","qualifier":"<=","value":"30","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"minimum","qualifier":">=","value":"6.5","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"30-day average","qualifier":"<=","value":"30","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"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":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Oil & Grease","parameter_code":"00556","statistic":"daily maximum","qualifier":"<=","value":"10","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"30-day average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Nitrogen, nitrite total [as N]","parameter_code":"00615","statistic":"30-day average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Nitrogen, nitrite total [as N]","parameter_code":"00615","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Nitrogen, nitrate total [as N]","parameter_code":"00620","statistic":"30-day average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Nitrogen, nitrate total [as N]","parameter_code":"00620","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Nitrogen, Kjeldahl, total [as N]","parameter_code":"00625","statistic":"30-day average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Nitrogen, Kjeldahl, total [as N]","parameter_code":"00625","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"30-day arithmetic mean","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JUL","AUG","SEP"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Cyanide, total [as CN]","parameter_code":"00720","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Arsenic, total [as As]","parameter_code":"01002","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Beryllium, total [as Be]","parameter_code":"01012","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Cadmium, total [as Cd]","parameter_code":"01027","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Chromium, total [as Cr]","parameter_code":"01034","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Copper, total [as Cu]","parameter_code":"01042","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Lead, total [as Pb]","parameter_code":"01051","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Molybdenum, total [as Mo]","parameter_code":"01062","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Nickel, total [as Ni]","parameter_code":"01067","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Silver, total [as Ag]","parameter_code":"01077","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Zinc, total [as Zn]","parameter_code":"01092","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Antimony, total [as Sb]","parameter_code":"01097","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Selenium, total [as Se]","parameter_code":"01147","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Total phenols","parameter_code":"03604","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Base/neutral compounds","parameter_code":"32015","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Acid compounds","parameter_code":"32020","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"daily maximum","qualifier":"<=","value":".5","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"30-day geometric mean","qualifier":"<=","value":"126","unit":"#/100mL","report_only":false,"enforceable":true,"months":["APR","MAY","JUN","JUL","AUG","SEP","OCT"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"30-day geometric mean","qualifier":"<=","value":"630","unit":"#/100mL","report_only":false,"enforceable":true,"months":["JAN","FEB","MAR","NOV","DEC"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"daily maximum","qualifier":"<=","value":"252","unit":"#/100mL","report_only":false,"enforceable":true,"months":["APR","MAY","JUN","JUL","AUG","SEP","OCT"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"daily maximum","qualifier":"<=","value":"1260","unit":"#/100mL","report_only":false,"enforceable":true,"months":["JAN","FEB","MAR","NOV","DEC"],"limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Volatile Organic Compound [VOC]","parameter_code":"51415","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Perfluorooctanoic acid (PFOA)","parameter_code":"51521","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorooctanoic acid (PFOA)","parameter_code":"51521","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorobutanoic acid (PFBA)","parameter_code":"51522","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorobutanoic acid (PFBA)","parameter_code":"51522","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorooctanesulfonamide (PFOSA)","parameter_code":"51525","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorooctanesulfonamide (PFOSA)","parameter_code":"51525","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoropentanoic acid (PFPeA)","parameter_code":"51623","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoropentanoic acid (PFPeA)","parameter_code":"51623","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorohexanoic acid (PFHxA)","parameter_code":"51624","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorohexanoic acid (PFHxA)","parameter_code":"51624","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoroheptanoic acid (PFHpA)","parameter_code":"51625","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoroheptanoic acid (PFHpA)","parameter_code":"51625","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorononanoic acid (PFNA)","parameter_code":"51626","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorononanoic acid (PFNA)","parameter_code":"51626","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorodecanoic acid (PFDA)","parameter_code":"51627","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorodecanoic acid (PFDA)","parameter_code":"51627","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoroundecanoic acid (PFUnA)","parameter_code":"51628","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoroundecanoic acid (PFUnA)","parameter_code":"51628","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorododecanoic acid (PFDoA)","parameter_code":"51629","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorododecanoic acid (PFDoA)","parameter_code":"51629","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorotridecanoic acid (PFTrDA)","parameter_code":"51630","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorotridecanoic acid (PFTrDA)","parameter_code":"51630","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorotetradecanoic acid (PFTeDA)","parameter_code":"51631","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorotetradecanoic acid (PFTeDA)","parameter_code":"51631","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)","parameter_code":"51641","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)","parameter_code":"51641","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)","parameter_code":"51642","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)","parameter_code":"51642","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)","parameter_code":"51643","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)","parameter_code":"51643","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)","parameter_code":"51644","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)","parameter_code":"51644","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorobutanesulfonic acid (PFBS)","parameter_code":"52602","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorobutanesulfonic acid (PFBS)","parameter_code":"52602","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorodecanesulfonic acid (PFDS)","parameter_code":"52603","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorodecanesulfonic acid (PFDS)","parameter_code":"52603","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoroheptanesulfonic acid (PFHpS)","parameter_code":"52604","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoroheptanesulfonic acid (PFHpS)","parameter_code":"52604","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorohexanesulfonic acid (PFHxS)","parameter_code":"52605","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorohexanesulfonic acid (PFHxS)","parameter_code":"52605","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorooctanesulfonic acid (PFOS)","parameter_code":"52606","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorooctanesulfonic acid (PFOS)","parameter_code":"52606","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)","parameter_code":"52607","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)","parameter_code":"52607","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)","parameter_code":"52608","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)","parameter_code":"52608","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)","parameter_code":"52609","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)","parameter_code":"52609","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoropentanesulfonic acid (PFPeS)","parameter_code":"52610","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoropentanesulfonic acid (PFPeS)","parameter_code":"52610","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorononanesulfonic acid (PFNS)","parameter_code":"52611","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorononanesulfonic acid (PFNS)","parameter_code":"52611","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Hexafluoropropylene oxide dimer acid (HFPO-DA)","parameter_code":"52612","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Hexafluoropropylene oxide dimer acid (HFPO-DA)","parameter_code":"52612","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)","parameter_code":"52626","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)","parameter_code":"52626","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)","parameter_code":"52629","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)","parameter_code":"52629","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorododecanesulfonic acid (PFDoS)","parameter_code":"52632","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluorododecanesulfonic acid (PFDoS)","parameter_code":"52632","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"4,8-Dioxa-3H-perfluorononanoic acid (ADONA)","parameter_code":"52636","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"4,8-Dioxa-3H-perfluorononanoic acid (ADONA)","parameter_code":"52636","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-methyl perfluorooctanesulfonamide (NMeFOSA)","parameter_code":"52641","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-methyl perfluorooctanesulfonamide (NMeFOSA)","parameter_code":"52641","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-ethyl perfluorooctanesulfonamide (NEtFOSA)","parameter_code":"52642","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"N-ethyl perfluorooctanesulfonamide (NEtFOSA)","parameter_code":"52642","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Solids, total dissolved","parameter_code":"70295","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"outfall":"001","parameter":"Mercury, total [as Hg]","parameter_code":"71900","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001 Annual Monitoring"},{"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":"Effluent Monthly Reporting"},{"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":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Flow, total","parameter_code":"82220","statistic":"30-day average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Flow, total","parameter_code":"82220","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"Oil and grease visual","parameter_code":"84066","statistic":"instantaneous maximum","qualifier":"<=","value":"0","unit":"N=0;Y=1","report_only":false,"enforceable":true,"months":"all","limit_set":"Effluent Monthly Reporting"},{"outfall":"001","parameter":"3-Perfluoropropyl propanoic acid (3:3 FTCA)","parameter_code":"PF001","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"3-Perfluoropropyl propanoic acid (3:3 FTCA)","parameter_code":"PF001","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoro-3-methoxypropanoic acid (PFMPA)","parameter_code":"PF002","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoro-3-methoxypropanoic acid (PFMPA)","parameter_code":"PF002","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)","parameter_code":"PF003","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)","parameter_code":"PF003","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)","parameter_code":"PF004","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)","parameter_code":"PF004","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"3-Perfluoroheptyl propanoic acid (7:3 FTCA)","parameter_code":"PF005","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"3-Perfluoroheptyl propanoic acid (7:3 FTCA)","parameter_code":"PF005","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoro-4-methoxybutanoic acid (PFMBA)","parameter_code":"PF006","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Perfluoro-4-methoxybutanoic acid (PFMBA)","parameter_code":"PF006","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)","parameter_code":"PF007","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)","parameter_code":"PF007","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PFAS MONITORING"},{"outfall":"001","parameter":"Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia","parameter_code":"TGM3B","statistic":"value","qualifier":"<=","value":"0","unit":"pass=0;fail=1","report_only":false,"enforceable":true,"months":"all","limit_set":"001 WET Testing"},{"outfall":"001","parameter":"Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas","parameter_code":"TGN6C","statistic":"value","qualifier":"<=","value":"0","unit":"pass=0;fail=1","report_only":false,"enforceable":true,"months":"all","limit_set":"001 WET Testing"},{"outfall":"001I","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"30-day average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001I - Influent Monitoring"},{"outfall":"001I","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001I - Influent Monitoring"},{"outfall":"001I","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"30-day average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001I - Influent Monitoring"},{"outfall":"001I","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":"001I - Influent Monitoring"},{"outfall":"001I","parameter":"Flow, total","parameter_code":"82220","statistic":"30-day average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"001I - Influent Monitoring"},{"outfall":"001I","parameter":"Flow, total","parameter_code":"82220","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"001I - Influent Monitoring"},{"outfall":"001R","parameter":"Temperature, water deg. centigrade","parameter_code":"00010","statistic":"30-day average","qualifier":null,"value":null,"unit":"deg C","report_only":true,"enforceable":true,"months":["JUN","JUL","AUG","SEP","OCT"],"limit_set":"001-RW Bighorn River Receiving Water Monitoring"},{"outfall":"001R","parameter":"Temperature, water deg. centigrade","parameter_code":"00010","statistic":"daily maximum","qualifier":null,"value":null,"unit":"deg C","report_only":true,"enforceable":true,"months":["JUN","JUL","AUG","SEP","OCT"],"limit_set":"001-RW Bighorn River Receiving Water Monitoring"},{"outfall":"001R","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["JAN","JUN","JUL","AUG","SEP","OCT"],"limit_set":"001-RW Bighorn River Receiving Water Monitoring"},{"outfall":"001R","parameter":"Hardness, total [as CaCO3]","parameter_code":"00900","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"001-RW Bighorn River Receiving Water Monitoring"}],"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":"MT0030759"},"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=MT0030759"},{"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":"MT0030759"},"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=MT0030759"}]}