Where is microplastic pollution most commonly found?

Microplastic pollution is most commonly found in surface waters. This is largely due to the way microplastics enter aquatic environments; they result from the breakdown of larger plastic debris through physical, chemical, and biological processes. These small plastic particles, often measuring less than 5 millimeters, can be transported easily by rainwater runoff or through rivers and streams, which subsequently flow into oceans and lakes.

Surface waters, including oceans, lakes, and rivers, serve as significant sinks for microplastics due to their extensive surface area and the prevalence of plastic waste in urban areas and coastal regions. Various studies have documented alarming concentrations of microplastics in these water bodies, impacting marine life, ecosystems, and even human health through the food chain.

In contrast, while microplastics can also be found in landfills, the atmosphere, and wetlands, these environments do not experience the same level of contamination or accumulation as surface waters. The widespread presence in surface waters is a concern for environmental scientists and policymakers focusing on water quality and aquatic health.