Monitoring Data & Maps

Monitoring Map and Data Portal

Click on individual mapped sites for a link to obtain monitoring data through the data portal.

To search by site listing, go directly to the Water Data Query Portal.

Select one or more testing parameters and a range of sampling dates.

Active Sites
Inactive Sites
USGS Stream Gages
Entire Watershed Outline
Selected Sub-watersheds
River Mile Markers
Virginia DEQ Impairments

NOTE: There is a limit of about 100 markers viewable in a map window — you may need to zoom in to see the marker or feature of interest to you.
Tip: Double-click or use your scroll wheel to zoom. Click and drag to pan around the map.
For a listing of sites and to toggle on/off individual elements, view in Google Maps