Oahu windward beaches microplastics survey

We report microplastic densities on windward beaches of Oahu, Hawai`i, USA. Microplastic densities, surveyed on six Oahu beaches, were highest on the beaches with the coarsest sands, associated with high wave energy. On those beaches, densities were very high (700-1700 particles m^-2), as high as those recorded on other remote island beaches worldwide.