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Find a Commonwealth ResourceFairfax County
Per Chapter 118 requirements, a countywide map of perennial streams and waterbodies to be used for regulatory purposes was developed through field surveys conducted in 2002-2003. For more information, please…
Updated Oct 8, 2026
Fairfax County
The map displays the general locations of RPA boundaries for planning purposes and the actual limits may be further refined by site-specific field studies conducted at the time a site-related plan is submitted to…
Updated Oct 8, 2026
Fairfax County
This polygon dataset represents impervious surface in Fairfax County. This dataset also includes areas that drain to Fairfax County. This includes portions of City of Fairfax, City of Alexandria, Falls Church, Arlington…
Updated Oct 8, 2026
Fairfax County
This dataset is a selection of known erosion and flooding problems throughout the County. The data is intended primarily to assist site plan preparers with establishing the existence of known erosion and flooding…
Updated Oct 8, 2026
Fairfax County
This dataset is a selection of known erosion and flooding problems throughout the County. The data is intended primarily to assist site plan preparers with establishing the existence of known erosion and flooding…
Updated Oct 8, 2026
Fairfax County
The Non-Department of Public Works and Environmental Services (DPWES) Dam Break Inundation Zones layer is maintained by Land Development Services (LDS). LDS will obtain the data from the Department of Emergency…
Updated Oct 8, 2026
Fairfax County
This dataset represents the boundaries of Fairfax County Potential Wetlands Areas. Applicants for many plan types are required to certify that all required wetlands permits will be acquired before land disturbance…
Updated Oct 8, 2026
