Microplastics in the sediments of a UK urban lake

While studies on microplastics in the marine environment show their wide-distribution, persistence and contamination of biota, the freshwater environment remains comparatively neglected. Where studies on freshwaters have been undertaken these have been on riverine systems or very large lakes. We present data on the distribution of microplastic particles in the sediments of Edgbaston Pool, a shallow eutrophic lake in central Birmingham, UK. These data provide, to our knowledge, the first assessment of microplastic concentrations in the sediments of either a small or an urban lake and the first for any lake in the UK. Maximum concentrations reached 25–30 particles per 100 g dried sediment (equivalent to low hundreds kg−1) and hence are comparable with reported river sediment studies. Fibres and films were the most common types of microplastic observed. Spatial distributions appear to be due to similar factors to other lake studies (i.e. location of inflow; prevailing wind directions; propensity for biofouling; distribution of macroplastic debris) and add to the growing burden of evidence for microplastic ubiquity in all environments. [Display omitted] •These are the first microplastics data for UK lake sediments, an urban or small lake.•Sediment concentrations are comparable to, or lower than, other equivalent data.•Microplastic fibres and films were the most common particle type.•Distributions appear to be related to inflows, wind directions and macroplastic litter. This paper presents the first microplastics data for UK lake sediments and, more broadly, for small and urban lakes, thereby contributing to the growing burden of evidence for microplastic ubiquity.