Clean Water Act discharge permit · NPDES MTR040010
YELLOWSTONE COUNTY/MDT SMALL MS-4, Billings, MT: NPDES MTR040010 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
YELLOWSTONE COUNTY/MDT SMALL MS-4, held by YELLOWSTONE COUNTY, holds NPDES permit MTR040010, which discharges to Yellowstone River. EPA’s file records it issued January 1, 2015 and expiring December 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 | YELLOWSTONE COUNTY/MDT SMALL MS-4 |
|---|---|
| Permittee as filed | YELLOWSTONE COUNTY |
| NPDES ID | MTR040010 |
| 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 | Small municipal storm sewer systems |
| Issued | January 1, 2015 |
| Expiration date | December 31, 2016 |
| Issuing agency | MONTANA DEQ |
| Address | Billings, MT 59107 |
| Receiving water | YELLOWSTONE RIVER |
| Subwatershed | Yellowstone River-Billings (HUC 100700041006) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES MTR040010.
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 1, 2022 | Discharge from a MS4 to waters of the U.S. without NPDES permit coverage | EP6 |
| April 1, 2022 | Failure to submit required application or NOI regarding MS4 operation or MS4 stormwater discharges | EP6 |
| December 31, 2021 | Discharge from a MS4 to waters of the U.S. without NPDES permit coverage | EP6 |
| June 14, 2018 | WW Storm Water MS4 - Failure to develop any or adequate SWPPP/SWMP | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, MTR040010.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MTR040010 there.
Nearby on the register
- Discharge permits in Billings
- Every permit record in Billings, 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.