The table below shows health conditions at sites over three assessment periods, including the 2008 assessment results. Assessments are derived from data spanning spanning 1½ to 3-year windows, and there is generally a lag of about 6 months between the end of an assessment window and the publication of results. The 2008 assessment, for example, is based on data collected from winter 2004/2005 through fall 2007.
| Color coding on map indicates the biological health of sites. | |
| Very good | meets Virginia standard |
| Good | probably meets Virgina standard |
| Fair | probably fails Virginia standard |
| Poor to Fair | fails Virginia standard (2004 only) |
| Poor | fails Virginia standard |
| Very poor | fails Virginia standard |
Here is the link to the complete StreamWatch database. Here you can really dig into the results.
Virginia Department of Environmental Quality
Real-time Streamflow Data from U.S. Geological Survey