Hinkle, Stephen R.; Polette, Danial J.; Oregon. Water Resources Dept., Geological Survey (U.S.) (U.S. Dept. of the Interior, U.S. Geological SurveyBranch of Information Services, 1999)
Arsenic concentrations exceeding the U.S. Environmental Protection Agency (USEPA) current Maximum Contaminant Level (MCL) of 50 micrograms per liter are widespread in ground water in the Willamette Basin. The Oregon Wate ...