Highlights
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The presence of artificial turf fibers was specifically investigated in river and sea surface waters.
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Artificial turf fibers accounted for up to 15% of meso- and macroplastic abundance.
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Artificial turf fibers were composed of polyethylene (86.3%) and polypropylene (13.7%).
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Up to 20,000 fibers day−1 and 213,200 fibers km−2 were found in river and sea surface waters.
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Riverine flux of artificial turf fibers was positively related to rainfall.
