The Occoquan Reservoir is an important public drinking water supply, recreational amenity and wildlife habitat area.

The Occoquan watershed (drainage area) covers 590 square miles and includes the 1,700-acre Occoquan Reservoir, which serves as the boundary between Fairfax and Prince William counties. Nearly 40% of Prince William County lands drain directly into the Occoquan Reservoir before flowing to the Potomac River and on to the Chesapeake Bay.

Shoreline Buffers Add Open Space, Protect Drinking Our Water Supply and Demonstrate Clean Water Commitments

Shoreline Buffers add Open Space, The Occoquan Reservoir is bordered by Fairfax County to the north and Prince William County to the south. Each county has taken a different approach toward the protecting the drinking water supply.