Plastics found in LA County water (IMAGE) University of California - Riverside Caption Microplastics are found in a wide range of shapes and sizes, and can be composed of many different polymers and associated contaminants. Credit Andrew Gray/UCR Usage Restrictions None 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.