Clean Water Act discharge permit · NPDES MT0025038
WILLOW CREEK WASTEWATER TREATMENT PLANT, Willow Creek, MT: NPDES MT0025038 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
WILLOW CREEK WASTEWATER TREATMENT PLANT, held by WILLOW CREEK SEWER DISTRICT, holds NPDES permit MT0025038, which discharges to Unnamed Irrigation Ditch. EPA’s file records it issued July 20, 2012 and expiring August 31, 2017. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WILLOW CREEK WASTEWATER TREATMENT PLANT |
|---|---|
| Permittee as filed | WILLOW CREEK SEWER DISTRICT |
| NPDES ID | MT0025038 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | July 20, 2012 |
| Expiration date | August 31, 2017 |
| Issuing agency | MONTANA DEQ |
| Address | Willow Creek, MT 59760 |
| Receiving water | UNNAMED IRRIGATION DITCH |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 22Pollutants on file
- 10Under a numeric limit
- 22With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 6 | 212 | 19 | February 28, 2022 | 1,205% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 212 | 17 | December 31, 2019 | 247% over the limit |
| Solids, suspended percent removal | 1 | 71 | 14 | December 31, 2019 | 519% over the limit |
| BOD, 5-day, percent removal | 1 | 65 | 6 | September 30, 2009 | 333% over the limit |
| pH | 2 | 125 | 4 | December 31, 2022 | |
| E. coli, MTEC-MF | 4 | 15 | 1 | December 31, 2019 | 46% over the limit |
| Flow rate | 2 | 122 | 0 | ||
| Chlorine, total residual | 0 | 98 | 0 | ||
| Coliform, fecal general | 0 | 30 | 0 | ||
| Temperature, water deg. centigrade | 2 | 26 | 0 | ||
| Phosphorus, total [as P] | 0 | 9 | 0 | ||
| Duration of discharge | 1 | 7 | 0 | ||
| Nitrogen, total [as N] | 0 | 7 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 4 | 0 | ||
| Oil and grease, hexane extr method | 0 | 4 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 4 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 4 | 0 | ||
| Solids, total dissolved [TDS] | 0 | 4 | 0 | ||
| Oil & Grease | 1 | 1 | 0 | ||
| Duration | 0 | 1 | 0 | ||
| Oil and grease visual | 0 | 1 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 11, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| January 11, 2023 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
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.
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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 MT0025038 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.