Clean Water Act discharge permit · NPDES MTG010216
TWIN HILLS COLONY, Carter, MT: NPDES MTG010216 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
TWIN HILLS COLONY, held by TWIN HILLS COLONY INC, holds NPDES permit MTG010216, which discharges to Dugout Coulee. EPA’s file records it issued April 20, 2009 and expiring October 31, 2013. 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 | TWIN HILLS COLONY |
|---|---|
| Permittee as filed | TWIN HILLS COLONY INC |
| NPDES ID | MTG010216 |
| 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 |
| Program | Concentrated animal feeding operations |
| Issued | April 20, 2009 |
| Expiration date | October 31, 2013 |
| Issuing agency | MONTANA DEQ |
| Address | Carter, MT 59420 |
| Receiving water | DUGOUT COULEE |
| Subwatershed | Upper Dugout Coulee (HUC 100302031502) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 8Under a numeric limit
- 8With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 1 | 1 | 0 | ||
| pH | 1 | 1 | 0 | ||
| Solids, total suspended | 1 | 1 | 0 | ||
| Nitrogen, total [as N] | 1 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 1 | 0 | ||
| Phosphorus, total [as P] | 1 | 1 | 0 | ||
| E. coli, MTEC-MF | 1 | 1 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTG010216.
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 |
|---|---|---|
| April 28, 2022 | WW CAFO - Management Practice Violations - Failure to Develop or Update NMP | ST6 |
| March 30, 2022 | WW CAFO - Reporting Violations - No Annual Report or Other Required Report Submitted | ST6 |
| March 30, 2022 | WW CAFO - Permitting Violations - Failure to submit required permit application or identifying info | ST6 |
| March 30, 2022 | WW CAFO - Management Practice Violations - Failure to Develop or Update NMP | 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, MTG010216.
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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 MTG010216 there.
Nearby on the register
- Discharge permits in Carter
- Every permit record in Carter, 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.