Groundwater Contamination Map (image) University of Nebraska-Lincoln Share Print E-Mail Caption The intensity of groundwater contamination via uranium (red) and nitrate (blue) is shown in two major aquifers and other sites through out the nation. UNL researcher Karrie Weber says the availability of uranium data pales compared to that of nitrate. Credit University of Nebraska-Lincoln Usage Restrictions None Share Print E-Mail 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.