Water sampling collection (IMAGE) University of California - San Diego Caption Study co-author Allegra Aron collects water from Tijuana River. Photo: Matthew Pendergraft Credit Matthew Pendergraft Usage Restrictions Must use credit License Original 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.