Maps
Browse through maps depicting Bay health and restoration, including pollution trends, public access sites and more.
Short-Term Trend in Flow-Adjusted Total Suspended Solids Concentration, 2004-2013
Date created: January 7, 2015Over the past decade, none of the monitoring sites in the Chesapeake Bay watershed have shown improving flow-adjusted trends in sediment concentrations. Between 2004 and 2013: zero sites have shown improving trends for sediment concentrations. Four sites—including the Appomattox, Choptank, Pamunkey and Patuxent rivers—have shown degrading trends. Five sites—including the James, Mattaponi, Potomac, Rappahannock and Susquehanna rivers—have shown minor changes that are not statistically significant.
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Long Term Flow-Adjusted Trends in Sediment, 1985-2013
Date created: January 7, 2015One-third of the monitoring sites in the Chesapeake Bay watershed show improving long-term flow-adjusted trends in suspended sediment concentrations. Between 1985 and 2013: three out of nine sites—including the Choptank, Patuxent and Potomac rivers—have shown improving trends for sediment concentrations. One site—the Pamunkey River—has shown degrading trends. Five sites—including the Appomattox, James, Mattaponi, Rappahannock and Susquehanna rivers—have shown minor changes that are not statistically significant.
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Short-Term Trend in Flow-Adjusted Total Phosphorus Concentration, 2004-2013
Date created: January 7, 2015Over the past decade, none of the monitoring sites in the Chesapeake Bay watershed have shown improving flow-adjusted trends in phosphorus concentrations. Between 2004 and 2013: zero sites have shown improving trends for phosphorus concentrations. Two sites—including the Choptank and Susquehanna rivers—have shown degrading trends. Seven sites—including the Appomattox, James, Mattaponi, Pamunkey, Patuxent, Potomac and Rappahannock rivers—have shown minor changes that are not statistically significant.
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Long-Term Trend in Flow-Adjusted Total Phosphorus Concentration, 1985-2013
Date created: January 7, 2015One-third of the monitoring sites in the Chesapeake Bay watershed show improving long-term flow-adjusted trends in phosphorus concentrations. Between 1985 and 2013: three out of nine sites—including the James, Patuxent and Potomac rivers—have shown improving trends for phosphorus concentrations. Three sites— including the Appomattox, Choptank and Pamunkey rivers—have shown degrading trends. Three sites—including the Mattaponi, Rappahannock and Susquehanna rivers—have shown minor changes that are not statistically significant.
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Short-Term Trend in Flow-Adjusted Total Nitrogen Concentration, 2004-2013
Date created: January 7, 2015Over the past decade, one-third of the monitoring sites in the Chesapeake Bay watershed have shown improving flow-adjusted trends in nitrogen concentrations. Between 2004 and 2013: three out of nine sites—including the Patuxent, Potomac and Susquehanna rivers—have shown improving trends for nitrogen concentrations. One site—the Choptank River—has shown degrading trends. Five sites—including the Appomattox, James, Mattaponi, Rappahannock and Pamunkey rivers—have shown minor changes that are not statistically significant.
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Long-Term Trend in Flow-Adjusted Total Nitrogen Concentration, 1985-2013
Date created: January 7, 2015Fifty-five percent of monitoring sites in the Chesapeake Bay watershed show improving long-term flow-adjusted trends in nitrogen concentrations. Between 1985 and 2013: five out of nine sites—including the James, Patuxent, Potomac, Rappahannock and Susquehanna rivers—have shown improving trends for nitrogen concentrations. Two sites—including the Choptank and Pamunkey rivers—have shown degrading trends. Two sites—including the Appomattox and Mattaponi rivers—have shown minor changes that are not statistically significant.
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Protected Lands 2013
Date created: September 18, 2014This map represents a complete, aggregated layer of protected lands in the Chesapeake Bay watershed and intersecting counties as of 2013. It is a combination of multiple state, federal and non-governmental organization sources. Overlapping and duplicate areas have been deleted to address double counting.
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Federal Lands and Facilities in the Chesapeake Bay Watershed
Date created: June 19, 2014This map was compiled by Chesapeake Bay Program staff to assist in the identification of Federally owned properties and facilities in the Chesapeake Bay Watershed.
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2013 Public Access
Date created: June 9, 2014Existing public access sites in the Chesapeake Bay watershed as reported by state partners through 2013. Sites added in 2013 are depicted in orange, while sites existing before 2013 are blue.
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SAV Salinity Zones
Date created: April 21, 2014Up until 2013, submerged aquatic vegetation (SAV, also known as bay grasses) acreage totals for the Chesapeake Bay were aggregated into three zones: Upper Bay, Middle Bay and Lower Bay. For 2013, it was decided to report the totals by the four salinity zones found in the Bay: tidal fresh, oligohaline, mesohaline and polyhaline. Since different species of SAV are generally found in waters of a specific range of salinity, tracking changes in SAV abundance by salinity could help track changes in species abundance more easily.
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