Dairy Operations (image) University of Illinois at Urbana-Champaign Share Print E-Mail Caption Wastewater from large dairies is a major source of estrogenic compounds in the environment. Credit Wei Zheng Usage Restrictions Photo may be used only with stories about the research described in this release. Credit required 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.