West Virginia has the highest share of EPA-regulated facilities in significant violation, at 3.14% (October 2026)
Across 51 states, 21,757 of 5,521,259 EPA-regulated facilities are in significant violation, 0.39% nationally. West Virginia is highest at 3.14% (1,651 of 52,514); Minnesota is lowest at 0.03%. Civic Forecast calculation from EPA ECHO facility summaries. A compliance rate among facilities EPA tracks, not a pollution measure; a state with few regulated facilities can rank high on a few cases.
Induced by API Automations for Civic Forecast from federal open data. Each finding names the datasets it was computed from. How this is calculated.