Reporting Region Summary:

Scores & Conceptual Diagram

	Bay Health Index	24% D-
Bottom-ranked grade: D- Slight decrease compared to 2006 score (28), leading to lowest score since 1991. Recent declines in chlorophyll a, aquatic grasses, and benthic community scores recorded.

	Index/Indicator	Score			Index/Indicator	Score
	Chlorophyll a	19%			Aquatic grasses	19%
	Dissolved oxygen	56%			Benthic Index of Biotic Integrity	20%
	Water clarity	6%			Phytoplankton Index of Biotic Integrity	27%
	Water Quality Index	27%			Biotic Index	22%

Excel Spreadsheet

Editable Vector Diagram (SVG)

Maps

This indicator map is already zoomed to the area of this region. You can pan and zoom and also change to another indicator map.

Trends Graph

This graph is dynamic, you can check and uncheck indicators ( checkboxes in legend), select year range ( click and drag), and export as an image (right click).

Editable Vector Version (SVG)

Excel Spreadsheet

Region Info

The York River watershed drains approximately 2,600 square miles of land. The York River watershed includes all of the area flowing into the Pamunkey and Mattaponi Rivers and their many tributaries. The Pamunkey and Mattaponi rivers begin in the Blue Ridge Mountains and meander through the Piedmont. Major cities in the watershed include Ashland, Gloucester Point, Hampton, and West Point. The census population for 2000 in the watershed was 372,488. Based on information in Dauer, et al., 2005 (http://www.deq.virginia.gov/bay/) and The York River and Small Coastal Basins Roundtable.

Editable Vector Version (SVG)

Additional Info

Relevant Websites

York River & Small Coastal Basins Roundtable
Virginia Tributary Strategies
Chesapeake Bay Program - Tributary Strategies
National Estaurine Eutrophication Assessment database