Resource Protection Areas Maps and Regulations
Fairfax County: Go the the County's Digital Map Viewer, click on Map View, enter your address, choose the Chesapeake Bay map under Map Type, then click “Get Selected Map.” Learn more about the regulations here. Find your borders in relationship to the nearest park on this map. A permit is needed to remove invasive vegetation from RPAs.
Here are some tips for the application process.
Loudoun: Go to Weblogis - Online Mapping System, click on Environment then also on Hydric Areas.
Arlington: Go to the Watershed and Resource Protection Areas map. Learn more here and here. Permits are not needed to remove invasive vegetation from RPAs in Arlington except for trees over 3 inches in diameter (assuming you are not causing soil disburbance.)