Clean Water Act discharge permit · NPDES MT0030309
TOWN OF GRASS RANGE WWTP, Grass Range, MT: NPDES MT0030309 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 12Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
TOWN OF GRASS RANGE WWTP, held by TOWN OF GRASS RANGE, holds NPDES permit MT0030309, which discharges to South Fork Mcdonald Creek. EPA’s file records it issued August 3, 2011 and expiring August 31, 2016. 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 | TOWN OF GRASS RANGE WWTP |
|---|---|
| Permittee as filed | TOWN OF GRASS RANGE |
| NPDES ID | MT0030309 |
| 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, 2011 |
| Expiration date | August 31, 2016 |
| Address | Grass Range, MT 59032 |
| Receiving water | SOUTH FORK MCDONALD CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lower South Fork McDonald Creek (HUC 100402040405) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 15Pollutants on file
- 12Under a numeric limit
- 14With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 0 | 9 | 5 | September 30, 2000 | 153% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 12 | 3 | July 31, 1999 | 47% over the limit |
| Nitrogen, ammonia total [as N] | 1 | 12 | 0 | ||
| Temperature, water deg. centigrade | 2 | 11 | 0 | ||
| pH | 2 | 11 | 0 | ||
| Phosphorus, total [as P] | 2 | 10 | 0 | ||
| Flow rate | 0 | 9 | 0 | ||
| Solids, total suspended | 4 | 7 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 5 | 0 | ||
| Nitrogen, total [as N] | 2 | 3 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 3 | 0 | ||
| Oil and grease, hexane extr method | 0 | 3 | 0 | ||
| E. coli, MTEC-MF | 2 | 2 | 0 | ||
| Duration of discharge | 1 | 1 | 0 | ||
| Flow rate | 2 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 6, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| August 6, 2024 | Monitoring Violations - Analysis not Conducted | ST6 |
| January 8, 2020 | Management Practice Violations - Failure to Maintain Records | ST6 |
| January 8, 2020 | Management Practice Violations - Improper Operation and Maintenance | 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
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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 MT0030309 there.
Nearby on the register
- Discharge permits in Grass Range
- Every permit record in Grass Range, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.