Over the past 10 years, the majority of phosphorus concentration trends are non-significant monitoring at sites within the Bay watershed with many sites showing improving condition and only a few are degrading. 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 phosphorus concentrations in streams.
Author: USGS
Date created: Jan 02 2013 / Download ( 969.45 KB )
