EPA v. Yellowstone County MS4
Final Order No Penalty
Case summary
Montana Department of Environmental Quality (DEQ) requested enforcement assistance from the EPA regarding Yellowstone County's failure to apply for a Municipal Separate Storm Sewer System (MS4) discharge permit. Yellowstone County previously maintained permit coverage from 2003 through 2022. Montana DEQ has provided Yellowstone County with a variety of resources to help them achieve permit compliance in the past. The EPA issued an Administrative Order for Compliance requiring Yellowstone County to cease all discharges of storm water to navigable waters, or apply to Montana DEQ for authorization to discharge storm water.
Defendants (1)
- Yellowstone County CommissionersNamed in complaintNamed in settlement
Facilities (1)
YELLOWSTONE COUNTY/MDT SMALL MS-4
HWY RIGHT OF WAYS IN YELLOWSTONE COUNTY, BILLINGS, MT, 59107-5024
Registry ID: 110032592148
Statutes cited
- CWA 301/402 — NPDES Permit Violations
Enforcement conclusions (1)
Yellowstone County MS4entered 2023-11-21
Primary law: CWA
Timeline (4 milestones)
- 2023-11-21Final Order Issued
- 2023-12-08Enforcement Action Data Entered
- 2026-07-28NPDES Closed
- 2026-07-28Enforcement Action Closed
Case metadata
- EPA activity ID
- 3603806832
- Case number
- 08-2024-0010
- Lead agency
- EPA
- EPA region
- 08
- Voluntary self-disclosure
- No
- Primary statute
- NPDES Permit Violations
Sourced verbatim from EPA ECHO Enforcement Case Report for case 08-2024-0010 . Bulk data: ICIS-FEC download summary.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.