The Association of Clean Water Administrators (ACWA) represents state, interstate, and territorial water program managers who implement the Clean Water Act (CWA), including the National Pollutant Discharge Elimination System (NPDES) program. Forty-seven states are currently authorized to issue NPDES permits, with New Mexico now working through the authorization process. States conduct the vast majority of environmental permitting, inspections, compliance, and enforcement activities nationwide, with the Environmental Council of States estimating states issue or manage more than 90% of all environmental permits under delegated/authorized authority.
ACWA Letter to EPA OECA AA 3-16-2026
