California Water Views

Last week, the Ocean Protection Council adopted California’s Statewide Microplastics Strategy. The strategy is the first of its kind in the nation, focusing on outlining steps to address microplastic pollution, an emerging contaminant of concern.

Microplastics are defined in California as plastics that are between one nanometer and five millimeters in size. Microplastics have long been a concern for marine life, but recently there has been an increase in concern about the impacts of ingesting microplastics on humans. California has led the nation in developing strategies to ...

This week, on June 16, the California State Water Resources Control Board (“State Water Board”) unanimously adopted a definition for microplastics, making California the first state to adopt a definition specifically applied to drinking water (footnotes omitted):

‘Microplastics in Drinking Water’ are defined as solid polymeric materials to which chemical additives or other substances may have been added, which are particles which have at least three dimensions that are greater than 1nm and less than 5,000 micrometers (µm). Polymers that are derived in nature that have not been chemically modified (other than by hydrolysis) are excluded.

The final definition is much the same as the proposed version that was issued in March 2020 for public comment, key differences being that ...