Municipal Separate Storm Sewer System (MS4)
Polluted stormwater runoff is commonly transported through Municipal Separate Storm Sewer Systems (MS4s), from there it  is regularly  often released  untreated into local bodies of water.
Make sure you’re doing your part by reporting any illicit discharges and illegal dumping in the storm drains that you see. Potential Sources of Illicit Discharges Used motor vehicle fluids such as oil, gas, and antifreeze
  • Household Hazardous Waste (such as household cleaners, paints, and pesticides)
  • Discharge from unpermitted industrial operations
  • Animal waste
  • Grass clippings and leaf litter
There are three easy ways to report it. For more information on preventing stormwater runoff pollution, visit the Northern Virginia Clean Water Partners website. For more information on MS4 and What Virginia is going to help keep the Environment clean visit Virginia's Department of Environmental Quality
Land-Disturbing Sites
To report construction site concerns regarding erosion and sediment control problems or stormwater run-off, please call the Department of Public Works at 703-221-3400 or email: ms4@dumfriesva.gov.
*If it's outside of the Town of Dumfries normal business hours or a holiday please use either of the below reporting options. lllicit Discharge Detection and Elimination (IDDE) Recognizing and reporting potential IDDE ORDINANCE ARTICLE V, DIVISION 3, CHAPTER 26, STORMWATER MANAGEMENT PROGRAM Action Plans
Local TMDL Action Plan  MS4 Permit Cycle 2013-2018 Chesapeake Bay TMDL Action Plan MS4 Permit Cycle 2013-2018 Chesapeake Bay TMDL Action Plan MS4 Permit Cycle 2018-2023 MS4 Program Annual Report