Arlington Public Schools (APS) understands the importance of protecting our local water ways from erosion and stormwater pollutants. APS received our Phase II (small) Municipal Separate Storm Sewer System (MS4) Permit on April 18, 2014. An MS4 is a conveyance or system of conveyances of stormwater (including roads, curbs, gutters, catch basins, man-made channels). We are responsible for developing best management practices or minimum control measures (MCM) in six areas.

1. Public Education and Outreach
   • Protecting Our Watershed
2. Public Involvement and Participation
3. Illicit Discharge Detection and Elimination (IDDE)
   • How to Report Stream Pollution, Spills, or Illegal Dumping
4. Construction Site Storm Water Runoff Control
5. Post-Construction Storm Water Management
6. Pollution Prevention and Good Housekeeping for School Operations
   • Pollution Prevention Presentation

Questions or comments on APS’ Stormwater Program may be directed to stormwater@APS. Thank you

Educational Partners

• Arlington Outdoor Lab
• Bay Watershed Education and Training (B-WET) 
• EcoAction Arlington

Program Documents and Quick Links

• Phase II (small) MS4 Permit
• Phase II (small) MS4 Program Plan
• IDDE Program Plan
• 2019 Phase II (small) MS4 Annual Report
• 2018 Phase II (small) MS4 Annual Report
• 2017 Phase II (small) MS4 Annual Report
• 2016 Phase II (small) MS4 Annual Report
• 2015 Phase II (small) MS4 Annual Report
• 2014 Phase II (small) MS4 Annual Report
• APS Phase II (small) MS4 Registration Statement
• Arlington County’s Stormwater Management Program