The California (USA) legislature passed a pair of bills in 2018 that require the State to develop microplastics management strategies for both drinking water and the coastal ocean. Central to creation of those strategies is an understanding of the critical thresholds at which microplastics actuate biological responses and how various microplastic properties influence those thresholds. To address this need, the Southern California Coastal Water Research Project Authority (SCCWRP) hosted a series of webinars on the topic, followed by a workshop among researchers and policy experts from around the world to galvanize science about the relationship between microplastics levels and biological effects. Here, we present a series of papers that evolved from that workshop, which were foundational to California’s microplastics management policies. Dr. Steve Weisberg, SCCWRP’s Executive Director, serves as Lead Guest Editor on this Collection.
Special Note: In keeping with research integrity principles, all papers co-authored by Dr. Weisberg, Dr. Koelmans, and other Microplastics and Nanoplastics editors were handled by other editors of the journal.
Lead Guest Editor
Steve Weisberg, Southern California Coastal Water Research Project Authority