Bay Grasses

In 2012, a survey by the Chesapeake Bay Program found the Bay had 48,191 acres of submerged aquatic vegitation (SAV), or underwater grasses,down from the 72,935 acres estimated by data gathered in 2004. This is just 26 percent of the 185,000-acre goal for the Bay and its tidal tributaries, down from 39 percent in 2004. Extreme weather conditions in recent years have contributed to the decrease.

Bay Grasses Distribution Used to Set the Restoration Goal in 2003 Bay Grasses (SAV) Restoration Goal Achievement 2010-2012
Bay Grasses Chesapeake Bay Program 695x912 Map: Bay Grasses (SAV) Restoration Goal Achievement 2010-2012
Download PDF (1.86 MB) Download PDF (1.86 MB)

The Chesapeake Bay Program has created an online mapping tool that shows how the Bay's underwater grasses have changed in location, abundance, and species over the last 30 years. Find the map at

Learn more about Bay grasses 

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