This map represents areas where water, such as from rainfall, cannot naturally soak into the ground. When water cannot soak into an impervious surface, it runs off downhill towards the nearest water body, often picking up and carrying pollutants along with it. Not only do these data help with modeling potential water pollution sources, but also can be used to quickly visualize more densely and less densely populated areas, and model the sprawl of human development.
More detailed information about how this map was created, and the data featured within, is available in this map's metadata record (this feature is coming shortly!)
The following viewing options are available for this map:
Select a Community:
Select a Watershed:
Want to choose your own custom area?
Explore this Map (Interactive Map)
For adventurous users (this is still being tested out):
View this map using Google Earth
And for experienced users:
View this map using your GIS