Arsenic Study Area (IMAGE) University of Oregon Caption This map shows the location of the aquifer in Oregon's southern Willamette Valley where the research was conducted. The area is south of Eugene. Credit Courtesy of Scott C. Maguffin Usage Restrictions Credit line required. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.