Clean Water Act discharge permit · NPDES MTG580039
TOWN OF BIG SANDY WASTEWATER TREATMENT FACILITY, Big Sandy, MT: NPDES MTG580039 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
TOWN OF BIG SANDY WASTEWATER TREATMENT FACILITY, held by TOWN OF BIG SANDY, holds NPDES permit MTG580039, which discharges to Unnamed Ditch To Big Sandy Creek. EPA’s file records it issued March 15, 2018 and expiring December 31, 2022. 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 BIG SANDY WASTEWATER TREATMENT FACILITY |
|---|---|
| Permittee as filed | TOWN OF BIG SANDY |
| NPDES ID | MTG580039 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 15, 2018 |
| Expiration date | December 31, 2022 |
| Address | Big Sandy, MT 59520 |
| Receiving water | UNNAMED DITCH TO BIG SANDY CREEK |
| Subwatershed | Big Sandy Creek-Rattlesnake Butte (HUC 100500050203) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 9Pollutants on file
- 9Under a numeric limit
- 4With a violation of any kind
- 4With 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 | 4 | 10 | 10 | October 31, 2018 | 1,213% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 8 | 8 | October 31, 2018 | 337% over the limit |
| E. coli, MTEC-MF | 4 | 2 | 2 | May 31, 2018 | 99,999% over the limit |
| BOD, 5-day, percent removal | 1 | 1 | 1 | May 31, 2018 | 93% over the limit |
| Flow rate | 2 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Oil & Grease | 2 | 0 | 0 | ||
| Duration of discharge | 1 | 0 | 0 | ||
| Oil and grease visual | 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
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 17, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| June 17, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| July 21, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| July 21, 2020 | Management Practice Violations - Failure to Maintain Records | ST6 |
| July 21, 2020 | Monitoring Violations - Analysis not Conducted | 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, MTG580039.
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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 MTG580039 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.