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Updated: Jan 30, 2026

Sampling and Identification of Microplastics in Groundwater
Published on: November 7, 2025
Microplastic Contamination in Karst Groundwater Systems
Samuel V Panno, Walton R Kelly1, John Scott2
1Illinois State Water Survey, Champaign, IL 61820.
Abstract:
Groundwater in karst aquifers constitutes about 25% of drinking water sources globally. Karst aquifers are open systems, susceptible to contamination by surface-borne pollutants. In this study, springs and wells from two karst aquifers in Illinois, USA, were found to contain microplastics and other anthropogenic contaminants. All microplastics were fibers, with a maximum concentration of 15.2 particles/L. The presence of microplastic was consistent with other parameters, including phosphate, chloride and triclosan, suggesting septic effluent as a source. More studies are needed on microplastic sources, abundance, and impacts on karst ecosystems.
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