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