Ballona Creek in Los Angeles (IMAGE) University of California - Los Angeles Caption Dismal grades for polluted rivers, lakes and streams brought down Los Angeles County's overall grade for water sustainability. Credit UCLA Sustainable LA Grand Challenge Staff Usage Restrictions You may use with the photo Credit: UCLA Sustainable LA Grand Challenge Staff 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.