A water sample from the East Branch Susquehanna River in Luzerne County contained three kinds of microplastic, according to a report released Tuesday by the PennEnvironment Research & Policy Center. The findings come from a wider study of the Chesapeake Bay watershed, which spans six states and Washington, D.C. Researchers have not yet established how much these particles affect human health.
What was found in the Susquehanna sample
The report's entry for the East Branch Susquehanna in Luzerne County lists microfibers, microfragments and microfilm. Microbeads were not marked for that site. Across the full watershed, microfibers appeared in 100 percent of sampled waterways, microfragments in 93 percent of sampled areas, microfilm in 47 percent and microbeads in 27 percent.
The report also includes Pennsylvania results from a 2021 survey of 53 sites. Plastic was present at every site surveyed. Microfibers were found at all of them, microfilm at 94 percent, microfragments at 87 percent and microbeads at 2 percent.
What counts as a microplastic
Microplastics are plastic particles smaller than 5 millimeters. Many form when larger plastic items, such as bottles, packaging and synthetic textiles, break down over time in the environment. The study grouped the particles into four types: fibers, fragments, film and beads. Fibers often shed from synthetic clothing during washing, which helps explain why they were the most widespread type.
Why it matters for households
The report identifies plastic waste as a major source of microplastic pollution. It recommends reducing single-use plastics and packaging, expanding recycling incentives and bottle-deposit programs, and adopting policies that shift some packaging waste costs to manufacturers. Individual households can help by cutting back on single-use items and choosing reusable containers where practical.
Researchers have raised concerns about possible effects on wildlife and people, but the report notes that more research is needed to understand the full impacts on human health. Readers should treat the findings as evidence of presence in the environment rather than proof of harm.