UpdatedWed, Mar 3, 2021 at 2:48 pm ET Replies(27) State Representative Tim Briggs sample Valley Creek in Valley Forge National Historic Park. (Hannah Pittel) BUCKS COUNTY, PA — Of the 53 waterways tested across Pennsylvania, microplastic contamination was found in every one of them, including the Delaware River and Bucks County streams. That's according to a new report released by the PennEnvironment Research & Policy Center using methodology developed by the National Oceanic and Atmospheric Administration. The report provides new data on the presence of microplastics in water samples taken from Delaware River, Neshaminy Creek and Tohickon Creek. Microplastics are defined as pieces of plastic less than 5 millimeters in diameter, which is smaller than a grain of rice.