Microplastics are a contaminant of increasing concern in aquatic environments. Our understanding of microplastics in freshwater environments has increased dramatically over the past decade, but we still lack information on microplastic occurrence and biological uptake in National Park Service (NPS) waters. During 2015–19, the U.S. Geological Survey and the NPS conducted a three-phase study of microplastic occurrence and biological uptake in NPS waters. This fact sheet summarizes results from Phase 3 in which microplastics were sampled at nine locations spanning various land uses on the Upper Delaware, Middle Delaware, and Lower Delaware Scenic and Recreational River and its tributaries in the northeastern United States. Water and sediment samples were collected during baseflow conditions at each location to assess microplastic occurrence, and fish and mussels were collected at a subset of locations to assess potential biological uptake of microplastics.
Baldwin, A.K., Spanjer, A.R., Hayhurst, B., and Hamilton, D., 2021, Microplastics in the Delaware River, northeastern United States: U.S. Geological Survey Fact Sheet 2020-3071, 4 p., https://doi.org/10.3133/fs20203071.
ISSN: 2327-6932 (online)
Table of Contents
- What are microplastics and where do they come from?
- Biological ingestion and effects
- Delaware River microplastic sampling efforts
- Delaware River microplastic sampling results
- References Cited
|Publication Subtype||USGS Numbered Series|
|Title||Microplastics in the Delaware River, northeastern United States|
|Series title||Fact Sheet|
|Publisher||U.S. Geological Survey|
|Publisher location||Reston, VA|
|Contributing office(s)||Idaho Water Science Center, Washington Water Science Center, Wisconsin Water Science Center|
|Description||Report: 4 p.; Data Release|
|State||Delaware, New Jersey, New York, Pennsylvania|
|Other Geospatial||Delaware River|
|Online Only (Y/N)||Y|
|Google Analytics Metrics||Metrics page|