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Photo from U.S. Geological Circular 1225--The Quality of Our Nation's Waters--Nutrients and Pesticides

Picture of the Central Columbia Plateau.
(Photo by Dennis Cline)
The Washington State Department of Ecology recently has created a Ground Water Management Area (GWMA) to protect ground water from nitrate contamination. The GWMA covers Grant, Franklin, and Adams Counties, located in an intensive agricultural region of the Central Columbia Plateau.

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