According to CAL MATTERS, California is planning to issue the world’s first guidelines for microplastics in drinking water. However, under a 2018 state law, the state is required to complete four years of testing and then consider guidelines to help water providers and consumers determine what levels may be safe to drink. California Water Resources Control Board is preparing to issue preliminary health-based threshold and testing methods by July 1, 2021. Presently, agreements on how to approach testing and designate levels of danger have yet to be established.
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