Airborne microfibres enter soil and water

Researchers from Empa, Eawag and Agroscope have produced the first systematic estimate of how much microplastic is deposited from the atmosphere across Switzerland. For areas below 2,000 metres, the study estimates annual deposition of about 219 tonnes, including roughly 78 tonnes on agricultural land and around ten tonnes directly into water bodies.

The official release identifies loose fibres from functional clothing among the sources that can enter the environment, alongside PET bottles and other plastic products. Sampling was conducted for a full year at five locations, with particles between 20 and 215 micrometres analysed using imaging infrared microspectroscopy. PET, polyethylene and polypropylene were the most frequently detected polymers.

For textiles, the findings matter because they add atmospheric transport to the better-known discussion around fibre release through washing. The work provides a new evidence base for assessing material emissions and mitigation priorities, while the researchers stress that long-term environmental and health effects remain under investigation.