EPA v. MAHONEY ENVIRONMENTAL SOLUTIONS LLC - APO (CWA NPDES)
Final Order With Penalty
Case summary
On September 28, 2026, Region 10 filed a consent agreement and final order resolving violations of the Clean Water Act by Mahoney Environmental Services, Seattle (Respondent) at its facility in Seattle, Washington. EPA alleges the respondent failed to comply with its National Pollutant Discharge Elimination System and Washington State Waste Discharge General Permit for Stormwater Discharges Associated with Industrial Activities at its used cooking oil collection and processing facility in Seattle. The permit covers stormwater discharges into the Duwamish River. Alleged violations include failure to maintain an adequate Stormwater Pollution Prevention Plan; failure to adequately implement and maintain best management practices; and failure to adequately conduct monitoring and inspections. The Respondent has agreed to pay a penalty of $65,234 and has returned to compliance.
Defendants (1)
- MAHONEY ENVIRONMENTAL SOLUTIONS LLCNamed in complaintNamed in settlement
Facilities (2)
MAHONEY ENVIRONMENTAL SOLUTIONS
6333 1ST AVE S, SEATTLE, WA, 98108
Registry ID: 110022932399
MAHONEY ENVIRONMENTAL SOLUTIONS
6333 1ST AVE S, SEATTLE, WA, 98108
Registry ID: 110022932399
Statutes cited
- CWA 301/402 — NPDES Permit Violations
Enforcement conclusions (1)
MAHONEY ENVIRONMENTAL SOLUTIONS LLC - APO (CWA NPDES)entered 2026-09-28
Primary law: CWA
Federal penalty: $67,106
Timeline (3 milestones)
- 2026-07-28Enforcement Action Data Entered
- 2026-09-28Final Order Issued
- 2026-09-28Complaint Filed/Proposed Order
Case metadata
- EPA activity ID
- 3605024689
- Case number
- 10-2026-0225
- Lead agency
- EPA
- EPA region
- 10
- Voluntary self-disclosure
- No
- Primary statute
- NPDES Permit Violations
Sourced verbatim from EPA ECHO Enforcement Case Report for case 10-2026-0225 . 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.