Clean Water Act discharge permit · NPDES MT0022462
TOWN OF DENTON WWTP, Denton, MT: NPDES MT0022462 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
TOWN OF DENTON WWTP, held by TOWN OF DENTON, holds NPDES permit MT0022462, which discharges to Wolf Creek. EPA’s file records it issued July 22, 2010 and expiring July 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 | TOWN OF DENTON WWTP |
|---|---|
| Permittee as filed | TOWN OF DENTON |
| NPDES ID | MT0022462 |
| 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 22, 2010 |
| Expiration date | July 31, 2015 |
| Issuing agency | MONTANA DEQ |
| Address | Denton, MT 59430 |
| Receiving water | WOLF CREEK |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 21Pollutants on file
- 15Under a numeric limit
- 21With a violation of any kind
- 8With 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 | 5 | 147 | 118 | May 31, 2025 | 1,026% over the limit |
| BOD, 5-day, 20 deg. C | 5 | 88 | 59 | May 31, 2025 | 5,881% over the limit |
| BOD, 5-day, percent removal | 1 | 33 | 27 | May 31, 2025 | 813% over the limit |
| Solids, suspended percent removal | 1 | 30 | 24 | May 31, 2025 | 1,110% over the limit |
| E. coli, MTEC-MF | 4 | 30 | 18 | May 31, 2025 | 3,868% over the limit |
| pH | 2 | 35 | 16 | May 31, 2025 | |
| Nitrogen, total [as N] | 2 | 5 | 2 | July 31, 2024 | 193% over the limit |
| Phosphorus, total [as P] | 2 | 5 | 2 | July 31, 2024 | 225% over the limit |
| Temperature, water deg. centigrade | 2 | 15 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 15 | 0 | ||
| Flow rate | 2 | 13 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 6 | 0 | ||
| Oil & Grease | 1 | 6 | 0 | ||
| Duration | 1 | 6 | 0 | ||
| Coliform, fecal general | 0 | 6 | 0 | ||
| Flow rate | 0 | 5 | 0 | ||
| Salinity | 0 | 4 | 0 | ||
| Chloride [as Cl] | 0 | 4 | 0 | ||
| Solids, total dissolved | 0 | 4 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 3 | 0 | ||
| Temperature, water deg. fahrenheit | 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
- 8Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 29, 2026 | Management Practice Violations - Failure to Maintain Records | ST6 |
| January 29, 2026 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| October 13, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| October 13, 2021 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| October 13, 2021 | Monitoring Violations - Analysis not Conducted | ST6 |
| October 13, 2021 | Effluent Violations - Numeric effluent violation | ST6 |
| October 13, 2021 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| October 13, 2021 | Reporting Violations - Improper/ Incorrect Reporting | 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 MT0022462 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.