Clean Water Act discharge permit · NPDES MT0030091
STOCKETT WATER AND SEWER DISTRICT DOMESTIC WASTEWATER TREATMENT FACILITY, Stockett, MT: NPDES MT0030091 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
STOCKETT WATER AND SEWER DISTRICT DOMESTIC WASTEWATER TREATMENT FACILITY, held by STOCKETT WATER AND SEWER DIST, holds NPDES permit MT0030091, which discharges to Cottonwood Creek. EPA’s file records it issued July 7, 2010 and expiring August 31, 2015. 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 | STOCKETT WATER AND SEWER DISTRICT DOMESTIC WASTEWATER TREATMENT FACILITY |
|---|---|
| Permittee as filed | STOCKETT WATER AND SEWER DIST |
| NPDES ID | MT0030091 |
| 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 7, 2010 |
| Expiration date | August 31, 2015 |
| Issuing agency | MONTANA DEQ |
| Address | Stockett, MT 59480 |
| Receiving water | COTTONWOOD CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Cottonwood Creek (HUC 100301020902) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 21Pollutants on file
- 16Under a numeric limit
- 21With 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 |
|---|---|---|---|---|---|
| E. coli, MTEC-MF | 6 | 51 | 31 | June 30, 2024 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 126 | 26 | April 30, 2026 | 1,465% over the limit |
| BOD, 5-day, percent removal | 1 | 34 | 24 | May 31, 2025 | 558% over the limit |
| Solids, total suspended | 4 | 74 | 9 | April 30, 2026 | 151% over the limit |
| pH | 2 | 53 | 5 | April 30, 2026 | |
| Coliform, fecal general | 0 | 19 | 1 | October 31, 2004 | 180% over the limit |
| Flow rate | 2 | 79 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 75 | 0 | ||
| Nitrogen, total [as N] | 2 | 36 | 0 | ||
| Phosphorus, total [as P] | 2 | 36 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 34 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 34 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 34 | 0 | ||
| Temperature, water deg. centigrade | 1 | 17 | 0 | ||
| Oil and grease, hexane extr method | 1 | 5 | 0 | ||
| Nickel, total recoverable | 1 | 2 | 0 | ||
| Zinc, total recoverable | 1 | 2 | 0 | ||
| Cadmium, total recoverable | 1 | 2 | 0 | ||
| Duration | 0 | 2 | 0 | ||
| Oil and grease visual | 0 | 2 | 0 | ||
| Hardness, total [as CaCO3] | 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
- 11Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 18, 2025 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| December 18, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| December 18, 2025 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| December 18, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 18, 2025 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| December 18, 2025 | Management Practice Violations - Failure to Maintain Records | ST6 |
| September 7, 2021 | Management Practice Violations - Failure to Maintain Records | ST6 |
| September 7, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| September 7, 2021 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| September 7, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| September 7, 2021 | Monitoring Violations - Analysis not Conducted | 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 MT0030091 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.