Fairfax, VA Environmental Rules: Stormwater Management (2026)

The City of Fairfax is a regulated MS4 locality under the Virginia Stormwater Management Program (VSMP) and the Virginia Stormwater Management Act (VA Code §62.1-44.15:24 et seq.). The City has its own Virginia DEQ-issued MS4 permit and enforces state stormwater regulations locally. Any land-disturbing activity of 2,500 square feet or more in the Chesapeake Bay Preservation Area (which covers the entire City) requires an erosion and sediment control plan approved by the City. Projects over 10,000 square feet require a full stormwater management plan demonstrating water quality and water quantity controls meeting state technical criteria. New development must manage runoff to meet phosphorus load reduction targets. Existing single-family residential redevelopment has streamlined but not exempted requirements. The City prohibits illicit discharges to the storm drain system including wash water, paint, oil, sediment, chlorinated pool water, and yard waste. Violations can result in fines up to $32,500 per day under the state act for serious violations. The City has active stream restoration programs on Accotink Creek and Daniels Run and participates in Chesapeake Bay TMDL compliance. Residents are encouraged to install rain gardens, rain barrels, and conservation landscaping; some of these qualify for grant programs.