Clean Water Act discharge permit · NPDES MT0020133
WHITEHALL WWTF, Whitehall, MT: NPDES MT0020133 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
WHITEHALL WWTF, held by TOWN OF WHITEHALL, holds NPDES permit MT0020133, which discharges to Big Pipestone Cr. EPA’s file records it issued January 22, 2009 and expiring February 28, 2014. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WHITEHALL WWTF |
|---|---|
| Permittee as filed | TOWN OF WHITEHALL |
| NPDES ID | MT0020133 |
| 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 | January 22, 2009 |
| Expiration date | February 28, 2014 |
| Issuing agency | MONTANA DEQ |
| Address | Whitehall, MT 59759 |
| Receiving water | BIG PIPESTONE CR |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lower Big Pipestone Creek (HUC 100200050204) |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 20Pollutants on file
- 16Under a numeric limit
- 20With a violation of any kind
- 7With 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 | 43 | 22 | August 31, 2012 | 1,821% over the limit |
| Solids, total suspended | 8 | 77 | 5 | April 30, 2009 | 54% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 75 | 3 | February 28, 2010 | 38% over the limit |
| pH | 4 | 45 | 3 | October 31, 2009 | |
| BOD, 5-day, percent removal | 1 | 13 | 3 | June 30, 2011 | 183% over the limit |
| Solids, suspended percent removal | 1 | 13 | 3 | July 31, 2010 | 168% over the limit |
| Coliform, fecal general | 0 | 5 | 1 | July 31, 2001 | 55% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 40 | 0 | ||
| Phosphorus, total [as P] | 7 | 37 | 0 | ||
| Nitrogen, total [as N] | 7 | 35 | 0 | ||
| Temperature, water deg. centigrade | 3 | 34 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 27 | 0 | ||
| Arsenic, total recoverable | 0 | 21 | 0 | ||
| Flow rate | 1 | 20 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 17 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 12 | 0 | ||
| Oil & Grease | 2 | 12 | 0 | ||
| Oil and grease, hexane extr method | 0 | 9 | 0 | ||
| Flow, in conduit or thru treatment plant | 0 | 6 | 0 | ||
| Solids, total dissolved [TDS] | 2 | 2 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 20, 2019 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| December 20, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 20, 2019 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| December 20, 2019 | Monitoring Violations - Frequency of Sampling Violation | 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 MT0020133 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.