Clean Water Act discharge permit · NPDES MTG580043
WASTEWATER TREATMENT FACILITY, Helena, MT: NPDES MTG580043 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
WASTEWATER TREATMENT FACILITY, held by Ten Mile Creek Estates/Pleasant Valley Water and Sewer District, holds NPDES permit MTG580043, which discharges to Prickly Pear Creek. EPA’s file records it issued January 30, 2019 and expiring December 31, 2022. 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 | WASTEWATER TREATMENT FACILITY |
|---|---|
| Permittee as filed | Ten Mile Creek Estates/Pleasant Valley Water and Sewer District |
| NPDES ID | MTG580043 |
| 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 | Not a publicly owned treatment works |
| Issued | January 30, 2019 |
| Expiration date | December 31, 2022 |
| Address | Helena, MT 59601 |
| Receiving water | PRICKLY PEAR CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lower Prickley Pear Gulch (HUC 100301011310) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 10Pollutants on file
- 9Under a numeric limit
- 10With 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 |
|---|---|---|---|---|---|
| pH | 2 | 18 | 16 | April 30, 2021 | |
| Solids, total suspended | 4 | 11 | 7 | April 30, 2021 | 141% over the limit |
| BOD, 5-day, percent removal | 1 | 4 | 3 | June 30, 2020 | 105% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 7 | 2 | June 30, 2020 | 60% over the limit |
| Oil & Grease | 2 | 5 | 0 | ||
| Flow rate | 2 | 3 | 0 | ||
| E. coli, MTEC-MF | 4 | 2 | 0 | ||
| Chlorine, total residual | 0 | 2 | 0 | ||
| Duration of discharge | 1 | 1 | 0 | ||
| Oil and grease visual | 1 | 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
- 9Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 16, 2024 | WW Storm Water Non-Construction - Failure to Maintain Records | ST6 |
| January 16, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| January 16, 2024 | Management Practice Violations - Failure to Conduct Inspections | ST6 |
| January 16, 2024 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| January 16, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| June 19, 2020 | Management Practice Violations - Failure to Maintain Records | ST6 |
| June 19, 2020 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| June 19, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| June 19, 2020 | Monitoring Violations - Invalid/Unrepresentative Sample | 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 MTG580043 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.