Maps
Browse through maps depicting Bay health and restoration, including pollution trends, public access sites and more.
Nitrogen Yields and Short-Term Trends Measured in Watershed Streams and Rivers
Date created: March 10, 2011Over the past 10 years, nitrogen concentration trends are downward at about half (16 out of 33) monitoring sites within the Bay watershed. The trend results indicate that in many locations, management actions, such as improved wastewater treatment and nonpoint-source pollution controls (i.e. urban stormwater runoff and agricultural runoff controls), have reduced nitrogen concentrations in streams. In addition, in the last 5 years, higher yields indicate a tendency to be located in the northern half of the watershed, conversely. lower yields are more numerous in the lower half of the watershed. The short-term flow-adjusted trends and yields indicator is calculated, and results and maps are published annually by the U.S. Geological Survey as part of a larger effort to determine loads and trends in nutrient and sediment concentrations and streamflow in the Chesapeake Bay watershed.
View mapBenthic Habitat (Index of Biological Integrity) (2010) Annual Average Score by Sampling Station
Date created: March 10, 2011This map shows the 2010 indicator status of the Benthic Index of Biological Integrity by station.
View mapDissolved Oxygen, Percent Goal Achieved for 2010, 3 YR Analysis
Date created: March 9, 2011The 2010 Dissolved Oxygen Indicator showing Percent of Goal Achieved using the three year analysis method.
View mapChemical Contaminants (2010)
Date created: March 7, 2011Tidal waters that are impaired for part or all of the indicated Bay segment by toxic chemicals based on each state's implementation of the Clean Water Act.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_57047.jpg)
Riparian Forest Buffer Restoration (2010)
Date created: March 4, 2011This map shows the locations of riparian forest buffer restoration projects throughout the Chesapeake Bay Watershed. Project locations were provided by Forestry Workgroup representatives from the Maryland Department of Natural Resources, Virginia Department of Forestry, and Pennsylvania Department of Conservation and Natural Resources.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_57023.jpg)
Bay Grasses (SAV) Restoration Goal Achievement: Single Best Year 2008-2010
Date created: March 4, 2011This map shows progress toward achieving the Chesapeake Bay Program segment-specific underwater bay grass restoration goals. It is based on the single best year of acreage as observed through the most recent three years of data from the Chesapeake Bay underwater bay grasses aerial survey.
View mapBay Grasses Planted (2009)
Date created: March 24, 2010In 2003, the CBP adopted the Strategy to Accelerate the Protection and Restoration of Submerged Aquatic Vegetation in the Chesapeake Bay including a commitment to plant 1,000 acres by 2008. The program partners have thus far planted 16% of their initial goal. In 2009, 9.6 acres were planted with funding from the National Oceanic and Atmospheric Administration and other sources. Both funding for SAV planting, and capacity for doing it, will need to be increased dramatically to meet the goal on time.
View mapShad Abundance (2009)
Date created: March 8, 2010American shad were once the most abundant and economically important species in the Chesapeake Bay. Shad are anadromous fish and spend most of their lives in the ocean, returning to freshwater rivers to spawn after they reach maturity. Data for the York and Potomac Rivers were provided by the Virginia Institute of Marine Science via an ongoing Catch per Unit Effort (CPUE) study involving American Shad gill-netting. Data for the Susquehanna and James Rivers represent published fishway passage values for Conowingo and Boshers Dams, respectively.
View mapBay Grasses (SAV) Restoration Goal Achievement: Single Best Year 2007-2009
Date created: March 8, 2010This map shows progress toward achieving the Chesapeake Bay Program segment-specific underwater bay grass restoration goals. It is based on the single best year of acreage as observed through the most recent three years of data from the Chesapeake Bay underwater bay grasses aerial survey.
View mapDissolved Oxygen, Percent Goal Achieved for 2009, 3 YR Analysis
Date created: March 5, 2010The 2009 Dissolved Oxygen Indicator showing Percent of Goal Achieved using the three year analysis method.
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