Maps
Browse through maps depicting Bay health and restoration, including pollution trends, public access sites and more.
Mid-Channel Water Clarity (2008)
Date created: March 9, 2009This map shows the percent of the Water Clarity goal achieved for each Chesapeake Bay Segment in 2008.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_34888.jpg)
Urban Sources of Total Phosphorus - Quartile Ranking within New York
Date created: March 5, 2009This map shows a quartile ranking within New York of the delivered yield (load per area) of Total Phosphorus from urban sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Phosphorus based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_34573.jpg)
Urban Sources of Total Nitrogen - Quartile Ranking within New York
Date created: March 5, 2009This map shows a quartile ranking within New York of the delivered yield (load per area) of Total Nitrogen from urban sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Nitrogen based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_34569.jpg)
Urban Sources of Total Phosphorus - Quartile Ranking within Delaware
Date created: March 5, 2009This map shows a quartile ranking within Delaware of the delivered yield (load per area) of Total Phosphorus from urban sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Phosphorus based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_34565.jpg)
Urban Sources of Total Nitrogen - Quartile Ranking within Delaware
Date created: March 5, 2009This map shows a quartile ranking within Delaware of the delivered yield (load per area) of Total Nitrogen from urban sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Nitrogen based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_34561.jpg)
Urban Sources of Total Phosphorus - Quartile Ranking within West Virginia
Date created: March 5, 2009This map shows a quartile ranking within West Virginia of the delivered yield (load per area) of Total Phosphorus from urban sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Phosphorus based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_34557.jpg)
Urban Sources of Total Nitrogen - Quartile Ranking within West Virginia
Date created: March 5, 2009This map shows a quartile ranking within West Virginia of the delivered yield (load per area) of Total Nitrogen from urban sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Nitrogen based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_34553.jpg)
Urban Sources of Total Phosphorus - Quartile Ranking within Virginia
Date created: March 5, 2009This map shows a quartile ranking within Virginia of the delivered yield (load per area) of Total Phosphorus from urban sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Phosphorus based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_34549.jpg)
Urban Sources of Total Nitrogen - Quartile Ranking within Virginia
Date created: March 5, 2009This map shows a quartile ranking within Virginia of the delivered yield (load per area) of Total Nitrogen from urban sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Nitrogen based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_34545.jpg)
Urban Sources of Total Phosphorus - Quartile Ranking within Pennsylvania
Date created: March 5, 2009This map shows a quartile ranking within Pennsylvania of the delivered yield (load per area) of Total Phosphorus from urban sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Phosphorus based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.
View map![](https://d18lev1ok5leia.cloudfront.net/chesapeakebay/_492xAUTO_crop_center-center_none/cbp_34541.jpg)