Clean Water Act discharge permit · NPDES MT0020001
MILES CITY WWTP, Miles City, MT: NPDES MT0020001 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 37Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
MILES CITY WWTP, held by CITY OF MILES CITY, holds NPDES permit MT0020001, which discharges to Yellowstone River. EPA’s file records it issued February 2, 2011 and expiring March 31, 2016. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MILES CITY WWTP |
|---|---|
| Permittee as filed | CITY OF MILES CITY |
| NPDES ID | MT0020001 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | February 2, 2011 |
| Expiration date | March 31, 2016 |
| Issuing agency | MONTANA DEQ |
| Address | Miles City, MT 59301 |
| Receiving water | YELLOWSTONE RIVER |
| Subwatershed | Yellowstone River-Miles City (HUC 101000012602) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 41Pollutants on file
- 37Under a numeric limit
- 12With a violation of any kind
- 5With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| E. coli, MTEC-MF | 10 | 21 | 21 | January 31, 2017 | 38,680% over the limit |
| BOD, 5-day, 20 deg. C | 9 | 2 | 2 | December 31, 2009 | 10% over the limit |
| Solids, total suspended | 9 | 2 | 2 | December 31, 2009 | 60% over the limit |
| Solids, suspended percent removal | 2 | 1 | 1 | December 31, 2009 | 39% over the limit |
| Coliform, fecal general | 0 | 1 | 1 | September 30, 2005 | 23% over the limit |
| Phosphorus, total [as P] | 2 | 4 | 0 | ||
| Flow rate | 4 | 2 | 0 | ||
| Nitrogen, total [as N] | 2 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 0 | 2 | 0 | ||
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | 0 | 2 | 0 | ||
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | 0 | 2 | 0 | ||
| Report due [yrmoda] | 4 | 0 | 0 | ||
| Chlorine, total residual | 3 | 0 | 0 | ||
| Temperature, water deg. centigrade | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| BOD, 5-day, percent removal | 2 | 0 | 0 | ||
| Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubia | 2 | 0 | 0 | ||
| TU Static Renewal 96Hr Acute Pimphales promelas | 2 | 0 | 0 | ||
| Oil and grease, hexane extr method | 1 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 | ||
| Cyanide, total [as CN] | 1 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 0 | 0 | ||
| Arsenic, total recoverable | 1 | 0 | 0 | ||
| Selenium, total recoverable | 1 | 0 | 0 | ||
| Thallium, total recoverable | 1 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 1 | 0 | 0 | ||
| Nickel, total recoverable | 1 | 0 | 0 | ||
| Silver total recoverable | 1 | 0 | 0 | ||
| Zinc, total recoverable | 1 | 0 | 0 | ||
| Cadmium, total recoverable | 1 | 0 | 0 | ||
| Lead, total recoverable | 1 | 0 | 0 | ||
| Chromium, total recoverable | 1 | 0 | 0 | ||
| Copper, total recoverable | 1 | 0 | 0 | ||
| Antimony, total recoverable | 1 | 0 | 0 | ||
| Phenols | 1 | 0 | 0 | ||
| Solids, total dissolved [TDS] | 1 | 0 | 0 | ||
| Mercury, total recoverable | 1 | 0 | 0 | ||
| Oil and grease visual | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MT0020001.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MT0020001 there.
Nearby on the register
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- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.