Flooding
Find information on how to protect your property from flooding, what is a floodplain, building around a floodplain, national flood insurance program, the community rating system, and dam safety.
Storm Drainage System
Find out what the storm drainage system is, where to see the public system, who maintains the drainage system, who maintains the easement, where to call to report a problem or get more information, what you can do to help.
News and Video
Maintenance and Inspections
Water Quality
Fairfax County studies stream health by monitoring living and non-living parts of our freshwater ecosystems. This information helps assess the condition of our watersheds and guides efforts to protect and care for our local freshwater resources. Learn more about how Fairfax County measures the health of our streams and lakes.
Maps and Publications
Maps: View interactive maps for stormwater improvement projects, infrastructure, flood hazard areas, floodplains, and watersheds.
Reports and Publications:
