Small MS4s operators located outside of the urbanized areas may be required to obtain a MS4 General Permit if there exists or there is the potential for significant water quality impairment. The National Pollutant Discharge Elimination System (NPDES) permitting authority (EPA) could make this determination by itself or after receiving a petition from concerned citizens or groups.
Regulated Towns
Regulation Requirements
- What is required for an MS4 under Phase II?
- Stormwater Management– Six Minimum Control Measures
- Forms and Instructions
- Detail Maps of NH Regulated Towns
Links of Interest
EPA Guidance Links
The following EPA guidance provides further information on regulated small MS4 coverage: