# USS MON VALLEY WORKS - IRVIN PLANT, WEST MIFFLIN PA: EPA ECHO compliance status: Violation Identified

**Remediation Urgency Score:** 63/100

| Field | Value |
|---|---|
| Facility | USS MON VALLEY WORKS - IRVIN PLANT |
| EPA Registry ID | 110008470724 |
| Address | CAMP HOLLOW RD, WEST MIFFLIN, PA, 15122 |
| County | ALLEGHENY |
| Industry (NAICS) | 331110: Iron and Steel Mills and Ferroalloy Manufacturing |
| SIC | 3312: Blast Furnaces And Steel Mills |
| Overall compliance status | Violation Identified |
| Significant noncomplier | No |
| Quarters in noncompliance (last 12) | 10 |
| Clean Water Act | Violation Identified |
| Clean Air Act | No Violation Identified |
| RCRA | No Violation Identified |
| Formal enforcement actions (5 years) | 3 |
| Total penalties | $135,000 |
| Last penalty | 11/20/2025 |
| Inspections (5 years) | 11 |
| Last inspection | 2026-09-03 |
| Watershed | Lower Monongahela |

## Why this score
- 10 of the last 12 quarters in noncompliance.
- Current violation under CWA.
- 3 formal enforcement action(s) in 5 years.
- $135,000 in penalties: remediation has a clear cost of inaction.
- Inspected within the last year (2026-09-03).

Source: U.S. EPA ECHO (Enforcement and Compliance History Online) (https://echo.epa.gov/detailed-facility-report?fid=110008470724). Last refreshed: 2026-11-04T18:09:33.420Z.
Compliance data comes from EPA ECHO and may lag state records; a violation flag is not a finding of wrongdoing. Informational only; not legal or engineering advice.