The City of Millersville is currently operating under the Phase II National Pollutant Discharge Elimination System (NPDES) General Permit for Discharges from Small MS4's (Permit # :TNS077887).  The permit allows the municipality to discharge stormwater runoff from municipal drainage systems into waters of the state. The permit requires that the City of Millersville develop and implement specific programs and best management practices to protect water quality through a Stormwater Management Program (SWMP). The Millersville SWMP is required to address stormwater quality through six minimum control measures.

MS4 Permit Minimum Control Measures:
1. Public Education and Outreach
2. Public Involvement/Participation
3. Illicit Discharge Detection and Elimination
4. Construction Site Runoff and Pollution Control
5. Permanent Stormwater management at New Development and Redevelopment Projects
6. Pollution Prevention/Good Housekeeping for Municipal Facilities

Additional Permit Requirements:
• Analytical and Non-Analytical Monitoring 
• Record Keeping