Clean Water Act discharge permit · NPDES MT0021601
FORT BENTON WWTP, Fort Benton, MT: NPDES MT0021601 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 31Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
FORT BENTON WWTP, held by CITY OF FORT BENTON, holds NPDES permit MT0021601, which discharges to Missouri River. EPA’s file records it issued August 14, 2013 and expiring September 30, 2018. 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 | FORT BENTON WWTP |
|---|---|
| Permittee as filed | CITY OF FORT BENTON |
| NPDES ID | MT0021601 |
| 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 14, 2013 |
| Expiration date | September 30, 2018 |
| Address | Fort Benton, MT 59442 |
| Receiving water | MISSOURI RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Missouri River-Fort Benton (HUC 100301021602) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 33Pollutants on file
- 31Under a numeric limit
- 28With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 34 | 203 | 47 | March 31, 2025 | 185% over the limit |
| BOD, 5-day, 20 deg. C | 18 | 88 | 38 | May 31, 2020 | 316% over the limit |
| Solids, suspended percent removal | 4 | 32 | 24 | June 30, 2022 | 129% over the limit |
| E. coli, MTEC-MF | 15 | 29 | 13 | June 30, 2023 | 5,860% over the limit |
| Phosphorus, total [as P] | 16 | 24 | 6 | March 31, 2016 | 88% over the limit |
| BOD, 5-day, percent removal | 4 | 11 | 3 | May 31, 2020 | 60% over the limit |
| pH | 9 | 22 | 2 | June 30, 2008 | |
| Nitrogen, total [as N] | 16 | 22 | 1 | January 31, 2018 | 2% over the limit |
| Flow rate | 2 | 16 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 5 | 8 | 0 | ||
| Nitrite + Nitrate total [as N] | 5 | 8 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 8 | 0 | ||
| Temperature, water deg. centigrade | 3 | 7 | 0 | ||
| Oil and grease, hexane extr method | 1 | 7 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 6 | 0 | ||
| Solids, total dissolved [TDS] | 0 | 6 | 0 | ||
| Oil & Grease | 3 | 5 | 0 | ||
| Arsenic, total recoverable | 6 | 2 | 0 | ||
| Iron, total recoverable | 6 | 2 | 0 | ||
| Selenium, total recoverable | 6 | 2 | 0 | ||
| Silver total recoverable | 6 | 2 | 0 | ||
| Zinc, total recoverable | 6 | 2 | 0 | ||
| Cadmium, total recoverable | 6 | 2 | 0 | ||
| Chromium, total recoverable | 6 | 2 | 0 | ||
| Copper, total recoverable | 6 | 2 | 0 | ||
| Mercury, total recoverable | 6 | 2 | 0 | ||
| Lead, total recoverable | 5 | 2 | 0 | ||
| Aluminum, dissolved [as Al] | 5 | 1 | 0 | ||
| Specific conductance | 3 | 0 | 0 | ||
| Chloride [as Cl] | 3 | 0 | 0 | ||
| Water level at sample collection time | 3 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 0 | 0 | ||
| Antimony, dissolved [as Sb] | 1 | 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 |
|---|---|---|
| June 18, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| June 18, 2024 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| June 18, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 30, 2020 | Reporting Violations - Improper/ Incorrect Reporting | 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 MT0021601 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.