Category: Health
Bay & watershed health maps from our Bay Program map gallery. Prior to using any of these maps, please view our terms of use to learn about usage rights.
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Date created: Nov 08, 2017
Chemical Contaminants (2014)
Tidal 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.
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Date created: Jul 02, 2015
Benthic Habitat (Index of Biological Integrity) (2014) Annual Average Score by Sampling Station
This map shows the 2014 indicator status of the Benthic Index of Biological Integrity by station.
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Date created: Jul 02, 2015
Benthic Habitat (Index of Biological Integrity) (2013) Annual Average Score by Sampling Station
This map shows the 2013 indicator status of the Benthic Index of Biological Integrity by station.
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Date created: Jul 02, 2015
Benthic Habitat (Index of Biological Integrity) (2014) Percent of Goal Achieved
This map shows the percent of the Index of Biological Integrity indicator goal achieved by segment.
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Date created: Jul 02, 2015
Benthic Habitat (Index of Biological Integrity) (2013) Percent of Goal Achieved
This map shows the percent of the Index of Biological Integrity indicator goal achieved by segment.
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Date created: Apr 30, 2015
Long-Term Trends for Bottom Orthophosphate in the Chesapeake Bay: 1999-2013
Long-term trends were computed by state partners using the Seasonal Kendall non-parametric technique for annual data collected from 1999-2013. Highly significant trends are indicated with triangles and possible trends are show with colored circles. Bottom Orthophosphate concentrations are decreasing/improving significantly at 21 stations, possibly decreasing at 7 stations, increasing/degrading significantly at 6 stations, and possibly increasing at 3 stations.
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Date created: Apr 30, 2015
Long-Term Trends for Bottom Total Phosphorus in the Chesapeake Bay: 1999-2013
Long-term trends were computed by state partners using the Seasonal Kendall non-parametric technique for annual data collected from 1999-2013. Highly significant trends are indicated with triangles and possible trends are show with colored circles. Bottom total phosphorus concentrations are decreasing/improving significantly at 27 stations, possibly decreasing at 13 stations, increasing/degrading significantly at 12 stations, and possibly increasing at 10 stations.
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Date created: Apr 28, 2015
Long-Term Trends for Bottom Total Nitrogen in the Chesapeake Bay: 1999-2013
Long-term trends were computed by state partners using the Seasonal Kendall non-parametric technique for annual data collected from 1999-2013. Highly significant trends are indicated with triangles and possible trends are show with colored circles. Bottom total nitrogen concentrations are decreasing/improving significantly at 31 stations, possibly decreasing at 15 stations, and increasing/degrading significantly at 1 station.
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Date created: Apr 28, 2015
Long-Term Trends for Surface Total Phosphorus in the Chesapeake Bay: 1999-2013
Long-term trends were computed by state partners using the Seasonal Kendall non-parametric technique for annual data collected from 1999-2013. Highly significant trends are indicated with triangles and possible trends are show with colored circles. Surface total phosphorus concentrations are decreasing/improving significantly at 36 stations, possibly decreasing at 23 stations, increasing/degrading significantly at 2 stations, and possibly increasing at 6 stations.
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Date created: Apr 28, 2015
Long-Term Trends for Surface Orthophosphate in the Chesapeake Bay: 1999-2013
Long-term trends were computed by state partners using the Seasonal Kendall non-parametric technique for annual data collected from 1999-2013. Highly significant trends are indicated with triangles and possible trends are show with colored circles. Surface Orthophosphate concentrations are decreasing/improving significantly at 29 stations, possibly decreasing at 7 stations, increasing/degrading significantly at 5 stations, and possibly increasing at 2 stations.
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