{"permit":"MN0020117","name":"Central Iron Range Sanitary Sewer District","state":"MN","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/MN0020117"},"about":[{"label":"What it is","text":"Sewage treatment plant · rated a major discharger by EPA"},{"label":"Where","text":"Chisholm, Minnesota","href":"https://www.openstreetmap.org/?mlat=47.4794053&mlon=-92.8419133#map=14/47.4794053/-92.8419133"},{"label":"Last 12 months","text":"Over a limit 2 times, last in January 2026 (pH; Phosphorus, total [as P]). 8 required values not reported"},{"label":"Permit","text":"In force until Jan 31, 2027"}],"renewal_due":{"date":"2026-08-04","when":"Aug 4, 2026, overdue","urgent":true},"renewal_check":{"offered_because":"application_overdue","application_due":"2026-08-04","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/MN0020117#renewal","says":"Each limit a renewal could tighten or add, from the state's water-quality standards and the federal rules for this kind of discharge, each cited to its rule, beside EPA's 12-month record; a rule we do not hold is named, never guessed. A person orders it on the permit's page with their email; it is sent by email within 5 business days."},"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":2,"over_by":[["pH",1],["Phosphorus, total [as P]",1]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"pH","times":1,"find_limits":{"parameter":"ph","place":"US-MN","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=ph&place=US-MN&medium=surface_water"},{"parameter":"Phosphorus, total [as P]","times":1,"find_limits":{"parameter":"phosphorus","place":"US-MN","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=phosphorus&place=US-MN&medium=surface_water"}],"limits":[{"outfall":"D018","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"monthly minimum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"pH","parameter_code":"00400","statistic":"monthly minimum","qualifier":">=","value":"6","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"pH","parameter_code":"00400","statistic":"monthly maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["MAY","SEP"],"limit_set":null},{"outfall":"D018","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":"<=","value":"30","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["MAY","SEP"],"limit_set":null},{"outfall":"D018","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":null},{"outfall":"D018","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":"<=","value":"145.8","unit":"kg/d","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum weekly average","qualifier":"<=","value":"217","unit":"kg/d","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":"<=","value":"24","unit":"mg/L","report_only":false,"enforceable":true,"months":["APR","MAY"],"limit_set":null},{"outfall":"D018","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":"<=","value":"13","unit":"mg/L","report_only":false,"enforceable":true,"months":["OCT","NOV"],"limit_set":null},{"outfall":"D018","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":"<=","value":"3.5","unit":"mg/L","report_only":false,"enforceable":true,"months":["JUN","JUL","AUG","SEP"],"limit_set":null},{"outfall":"D018","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":"<=","value":"18","unit":"mg/L","report_only":false,"enforceable":true,"months":["JAN","FEB","MAR","DEC"],"limit_set":null},{"outfall":"D018","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":"<=","value":"226.8","unit":"kg/d","report_only":false,"enforceable":true,"months":["APR","MAY"],"limit_set":null},{"outfall":"D018","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":"<=","value":"122.8","unit":"kg/d","report_only":false,"enforceable":true,"months":["OCT","NOV"],"limit_set":null},{"outfall":"D018","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":"<=","value":"33.1","unit":"kg/d","report_only":false,"enforceable":true,"months":["JUN","JUL","AUG","SEP"],"limit_set":null},{"outfall":"D018","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":"<=","value":"170.1","unit":"kg/d","report_only":false,"enforceable":true,"months":["JAN","FEB","MAR","DEC"],"limit_set":null},{"outfall":"D018","parameter":"Nitrogen, Kjeldahl, total [as N]","parameter_code":"00625","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Nitrite + Nitrate total [as N]","parameter_code":"00630","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"monthly average","qualifier":"<=","value":"1","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"monthly average","qualifier":null,"value":null,"unit":"kg/d","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"annual total","qualifier":"<=","value":"1644","unit":"kg/yr","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Copper, total [as Cu]","parameter_code":"01042","statistic":"quarterly average","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":["MAR","JUN","SEP","DEC"],"limit_set":null},{"outfall":"D018","parameter":"Coliform, fecal MPN + membrane ftl 44.5 C","parameter_code":"48201","statistic":"monthly geometric mean","qualifier":"<=","value":"200","unit":"#/100mL","report_only":false,"enforceable":true,"months":["APR","MAY","JUN","JUL","AUG","SEP","OCT"],"limit_set":null},{"outfall":"D018","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":null},{"outfall":"D018","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly total","qualifier":null,"value":null,"unit":"Mgal/mo","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"daily maximum","qualifier":"<=","value":".038","unit":"mg/L","report_only":false,"enforceable":true,"months":["APR","MAY","JUN","JUL","AUG","SEP","OCT"],"limit_set":null},{"outfall":"D018","parameter":"Solids, total dissolved","parameter_code":"70295","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["MAR","SEP"],"limit_set":null},{"outfall":"D018","parameter":"Mercury, dissolved [as Hg]","parameter_code":"71890","statistic":"monthly average","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":["MAY","SEP"],"limit_set":null},{"outfall":"D018","parameter":"Mercury, dissolved [as Hg]","parameter_code":"71890","statistic":"daily maximum","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":["MAY","SEP"],"limit_set":null},{"outfall":"D018","parameter":"Mercury, total [as Hg]","parameter_code":"71900","statistic":"monthly average","qualifier":"<=","value":"1.8","unit":"ng/L","report_only":false,"enforceable":true,"months":["MAY","SEP"],"limit_set":null},{"outfall":"D018","parameter":"Mercury, total [as Hg]","parameter_code":"71900","statistic":"daily maximum","qualifier":"<=","value":"3.2","unit":"ng/L","report_only":false,"enforceable":true,"months":["MAY","SEP"],"limit_set":null},{"outfall":"D018","parameter":"BOD, carbonaceous [5 day, 20 C]","parameter_code":"80082","statistic":"monthly average","qualifier":"<=","value":"15","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"BOD, carbonaceous [5 day, 20 C]","parameter_code":"80082","statistic":"maximum weekly average","qualifier":"<=","value":"25","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"BOD, carbonaceous [5 day, 20 C]","parameter_code":"80082","statistic":"monthly average","qualifier":"<=","value":"74.7","unit":"kg/d","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"BOD, carbonaceous [5 day, 20 C]","parameter_code":"80082","statistic":"maximum weekly average","qualifier":"<=","value":"123.4","unit":"kg/d","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"BOD, carb-5 day, 20 deg C, percent removal","parameter_code":"80091","statistic":"monthly average minimum","qualifier":">=","value":"85","unit":"%","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"D018","parameter":"Solids, suspended percent removal","parameter_code":"81011","statistic":"monthly average minimum","qualifier":">=","value":"85","unit":"%","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"Precipitation, total defined period/in","parameter_code":"00193","statistic":"monthly total","qualifier":null,"value":null,"unit":"in","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"pH","parameter_code":"00400","statistic":"monthly minimum","qualifier":null,"value":null,"unit":"SU","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"pH","parameter_code":"00400","statistic":"monthly maximum","qualifier":null,"value":null,"unit":"SU","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":["MAY","SEP"],"limit_set":null},{"outfall":"S024","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":null},{"outfall":"S024","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"Nitrogen, Kjeldahl, total [as N]","parameter_code":"00625","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"Nitrite + Nitrate total [as N]","parameter_code":"00630","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","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":null},{"outfall":"S024","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly total","qualifier":null,"value":null,"unit":"Mgal/mo","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"Mercury, dissolved [as Hg]","parameter_code":"71890","statistic":"monthly average","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":["MAY","SEP"],"limit_set":null},{"outfall":"S024","parameter":"Mercury, total [as Hg]","parameter_code":"71900","statistic":"monthly average","qualifier":null,"value":null,"unit":"ng/L","report_only":true,"enforceable":true,"months":["MAY","SEP"],"limit_set":null},{"outfall":"S024","parameter":"BOD, carbonaceous [5 day, 20 C]","parameter_code":"80082","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"S024","parameter":"BOD, carbonaceous [5 day, 20 C]","parameter_code":"80082","statistic":"monthly maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":null}],"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":"ph","place":"US-MN","medium":"surface_water"},"needs":{},"get":"https://passage-data.com/api/v1/limits?parameter=ph&place=US-MN&medium=surface_water","url":"https://passage-data.com/api/v1/limits?parameter=ph&place=US-MN&medium=surface_water","page":"https://passage-data.com/limits/US-MN/ph"},{"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":"MN0020117"},"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=MN0020117"},{"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":"MN0020117"},"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=MN0020117"}]}