BOD and COD Measurement Methods (IMAGE) Helmholtz-Zentrum Hereon Caption International study shows that freshwater polluted by fecal material can be determined more quickly and reliably using a new technique. Credit From Jiao et al, doi:10.1126/sciadv.abc7318. This work is licensed under CC BY-NC (http://creativecommons.org/licenses/by-nc/4.0/) Usage Restrictions CC BY-NC 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.