EPA Proposes NPDES General Permit for Small MS4s in Region 9

Summary

The Environmental Protection Agency (EPA) Region 9 is proposing a National Pollutant Discharge Elimination System (NPDES) general permit for storm water discharges from small municipal separate storm sewer systems (MS4s) in Arizona, California, Nevada, and U.S. Pacific Island territories, in accordance with the Clean Water Act (CWA) and final EPA regulations.