Ground and surface waters in urban areas are susceptible to nitrate contamination from septic
systems, leaking sewer lines, and fertilizer applications. Source identification is a primary …

THIS REPORT summarizes major findings about water quality in the Puget Sound Basin
that emerged from an assessment conducted between 1996 and 1998 by the US Geological …

Erosion control practices instituted since the late 1970s have reduced erosion from cropland
in the Palouse River Basin by at least 10 percent, according to model results. If monitoring …

From late 1979 to early 1982 the US Geological Survey, in cooperation with the City of Bellevue,
Wash., conducted an investigation of the quantity and quality of urban runoff from three …

This report contains the major findings of a 1999? 2000 assessment of water quality in
streams and drains in the Yakima River Basin. It is one of a series of reports by the NAWQA …

Yields of suspended sediment from watersheds in the Quincy and Pasco Basins of Washington
State have been reduced by the use of sprinkler irrigation on cropland previously in …

Study Design The study was designed to detect the largest number of pesticides likely to be
transported in surface runoff to urban streams. Sampling occurred when pesticide …

In 1986, the Yakima River Basin was selected as one of four surface-water pilot studies as
part of the US Geological Survey National Water-Quality Assessment (NAWQA) Program. Full …

Rainfall is a significant source of some constituents, particularly nitrogen species, in storm
runoff from urban catchments. Median contributions of rainfall to storm runoff loads of 12 …

From October 1979 through January 1982 the US Geological Survey conducted an urban-runoff
study in Bellevue, Washington. The study, done in cooperation with the City of Bellevue, …