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Map: Chesapeake Bay watershed 10 year nitrogen flow-adjusted concentration trend 2002 - 2011

Over the past 10 years, the majority of nitrogen concentration trends are non-significant (28 sites), with 19 sites showing improving condition and only 1 site showing degrading conditions. 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.

Author: USGS

Date created: Jan 02 2013 / Download ( 963.5 KB )

Chesapeake Bay watershed 10 year nitrogen flow-adjusted concentration trend 2002 - 2011
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