Clean Water Act discharge permit · NPDES MT0031835
BROWNING WASTEWATER TREATMENT LAGOON, Browning, MT: NPDES MT0031835 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
BROWNING WASTEWATER TREATMENT LAGOON, held by Blackfeet Tribe - Blackfeet Water Department, holds NPDES permit MT0031835. EPA’s file records it issued July 20, 2024 and expiring July 31, 2029. 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 | BROWNING WASTEWATER TREATMENT LAGOON |
|---|---|
| Permittee as filed | Blackfeet Tribe - Blackfeet Water Department |
| NPDES ID | MT0031835 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | July 20, 2024 |
| Expiration date | July 31, 2029 |
| Address | Browning, MT 59417 |
| Subwatershed | Depot Creek (HUC 100302020201) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 16Pollutants on file
- 16Under a numeric limit
- 16With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| Oil and grease visual | 1 | 35 | 13 | August 31, 2025 | 2,147,483,650% over the limit |
| Chlorine, total residual | 2 | 56 | 12 | July 31, 2025 | 900% over the limit |
| E. coli | 2 | 56 | 12 | August 31, 2025 | 1,821% over the limit |
| Solids, total suspended | 3 | 78 | 11 | June 30, 2025 | 107% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 73 | 6 | March 31, 2025 | 207% over the limit |
| Solids, suspended percent removal | 1 | 28 | 5 | May 31, 2025 | 126% over the limit |
| pH | 4 | 96 | 4 | July 31, 2025 | |
| BOD, 5-day, percent removal | 1 | 25 | 2 | May 31, 2025 | 137% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 67 | 0 | ||
| Temperature, water deg. centigrade | 2 | 46 | 0 | ||
| Nitrogen, total [as N] | 2 | 44 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 44 | 0 | ||
| Phosphorus, total [as P] | 2 | 44 | 0 | ||
| Nitrogen, Kjeldahl Total | 2 | 44 | 0 | ||
| Flow, total | 2 | 44 | 0 | ||
| Oil & Grease | 1 | 23 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MT0031835.
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 MT0031835 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.