Clean Water Act discharge permit · NPDES MT0028665
SUN PRAIRIE VILLAGE WWTP, Great Falls, MT: NPDES MT0028665 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 19Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
SUN PRAIRIE VILLAGE WWTP, held by SUN PRAIRIE VILLAGE W AND S DIST, holds NPDES permit MT0028665, which discharges to Sun River. EPA’s file records it issued August 3, 2005 and expiring August 31, 2010. 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 | SUN PRAIRIE VILLAGE WWTP |
|---|---|
| Permittee as filed | SUN PRAIRIE VILLAGE W AND S DIST |
| NPDES ID | MT0028665 |
| 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 | August 3, 2005 |
| Expiration date | August 31, 2010 |
| Issuing agency | MONTANA DEQ |
| Address | Great Falls, MT 59404 |
| Receiving water | SUN RIVER |
| Subwatershed | Sun River-Manchester (HUC 100301040905) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 19Pollutants on file
- 19Under a numeric limit
- 19With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 2 | 101 | 91 | March 31, 2025 | 249% over the limit |
| Solids, suspended percent removal | 2 | 72 | 66 | June 30, 2026 | 177% over the limit |
| BOD, 5-day, 20 deg. C | 14 | 60 | 30 | July 31, 2026 | 93% over the limit |
| E. coli, MTEC-MF | 8 | 52 | 26 | March 31, 2023 | 47,519% over the limit |
| pH | 6 | 20 | 8 | June 30, 2026 | |
| Solids, total suspended | 14 | 36 | 6 | May 31, 2026 | 38% over the limit |
| BOD, 5-day, percent removal | 2 | 7 | 1 | July 31, 2007 | 17% over the limit |
| Phosphorus, total [as P] | 2 | 20 | 0 | ||
| Chlorine, total residual | 7 | 16 | 0 | ||
| Flow rate | 2 | 13 | 0 | ||
| Nitrogen, total [as N] | 2 | 12 | 0 | ||
| Coliform, fecal general | 6 | 9 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 8 | 0 | ||
| Temperature, water deg. centigrade | 2 | 8 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 6 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 6 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 0 | ||
| Oil and grease, hexane extr method | 1 | 1 | 0 | ||
| Solids, total dissolved [TDS] | 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
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 26, 2023 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| January 26, 2023 | Monitoring Violations - No Flow Measurement Device | ST6 |
| January 26, 2023 | Reporting Violations - Late Submittal of DMRs | ST6 |
| January 26, 2023 | Monitoring Violations - Analysis not Conducted | ST6 |
| February 19, 2019 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| February 19, 2019 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| February 19, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| February 19, 2019 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| February 19, 2019 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| February 19, 2019 | Management Practice Violations - Failure to Conduct Inspections | 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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MT0028665.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MT0028665 there.
Nearby on the register
- Discharge permits in Great Falls
- Every permit record in Great Falls, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.