Clean Water Act discharge permit · NPDES MT0021679
SUNBURST WWTF, Sunburst, MT: NPDES MT0021679 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
SUNBURST WWTF, held by TOWN OF SUNBURST, holds NPDES permit MT0021679, which discharges to Unnamed Lake. EPA’s file records it issued September 28, 2012 and expiring October 31, 2017. 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 | SUNBURST WWTF |
|---|---|
| Permittee as filed | TOWN OF SUNBURST |
| NPDES ID | MT0021679 |
| 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 | September 28, 2012 |
| Expiration date | October 31, 2017 |
| Issuing agency | MONTANA DEQ |
| Address | Sunburst, MT 59482 |
| Receiving water | UNNAMED LAKE |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 19Pollutants on file
- 16Under a numeric limit
- 19With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 4 | 254 | 57 | April 30, 2026 | 714% over the limit |
| Solids, total suspended | 6 | 247 | 41 | April 30, 2026 | 532% over the limit |
| BOD, 5-day, percent removal | 1 | 25 | 16 | April 30, 2026 | 548% over the limit |
| Solids, suspended percent removal | 1 | 17 | 9 | April 30, 2026 | 449% over the limit |
| pH | 2 | 57 | 5 | July 31, 2022 | |
| Flow, in conduit or thru treatment plant | 0 | 70 | 0 | ||
| Nitrogen, total [as N] | 2 | 37 | 0 | ||
| Phosphorus, total [as P] | 2 | 37 | 0 | ||
| Temperature, water deg. centigrade | 1 | 26 | 0 | ||
| Chlorine, total residual | 1 | 26 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 25 | 0 | ||
| Duration of discharge | 1 | 25 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 18 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 18 | 0 | ||
| Coliform, fecal general | 0 | 18 | 0 | ||
| Flow rate | 2 | 14 | 0 | ||
| E. coli, MTEC-MF | 1 | 7 | 0 | ||
| Oil and grease, hexane extr method | 0 | 5 | 0 | ||
| Duration | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 11, 2026 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| February 11, 2026 | Monitoring Violations - Analysis not Conducted | ST6 |
| February 11, 2026 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| February 11, 2026 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| August 19, 2021 | Management Practice Violations - Failure to Maintain Records | ST6 |
| August 19, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| August 19, 2021 | 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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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.