Clean Water Act discharge permit · NPDES MTG581020
CITY OF TOWNSEND WASTEWATER TREATMENT PLANT, Townsend, MT: NPDES MTG581020 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
CITY OF TOWNSEND WASTEWATER TREATMENT PLANT, held by CITY OF TOWNSEND, holds NPDES permit MTG581020, which discharges to Missouri River. EPA’s file records it issued January 17, 2018 and expiring December 31, 2022. 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 | CITY OF TOWNSEND WASTEWATER TREATMENT PLANT |
|---|---|
| Permittee as filed | CITY OF TOWNSEND |
| NPDES ID | MTG581020 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 17, 2018 |
| Expiration date | December 31, 2022 |
| Address | Townsend, MT 59644 |
| Receiving water | MISSOURI RIVER |
| Subwatershed | Missouri River-Townsend (HUC 100301010906) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 14Under a numeric limit
- 8With a violation of any kind
- 4With 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 | 4 | 38 | 38 | November 30, 2019 | 9,424% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 16 | 16 | December 31, 2021 | 1,232% over the limit |
| BOD, 5-day, percent removal | 1 | 11 | 11 | October 31, 2019 | 186% over the limit |
| pH | 2 | 2 | 2 | August 31, 2021 | |
| Flow rate | 2 | 5 | 0 | ||
| Nitrogen, total [as N] | 4 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 1 | 0 | ||
| Solids, total suspended | 4 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 0 | 0 | ||
| Phosphorus, total [as P] | 2 | 0 | 0 | ||
| Oil & Grease | 1 | 0 | 0 | ||
| Duration of discharge | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 9, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| January 9, 2024 | Management Practice Violations - Failure to Conduct Inspections | ST6 |
| January 9, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| June 26, 2020 | Management Practice Violations - Failure to Maintain Records | ST6 |
| June 26, 2020 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| June 26, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| June 26, 2020 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | 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 MTG581020 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.