Chalk streams are being impacted by microparticle pollution, according to a new study.
Fewer than 300 chalk streams exist worldwide, and England is home to most of them – but these irreplaceable habitats aren’t safe. A first-of-its-kind study on the River Itchen, by the University of Brighton and Upper Itchen Restoration Community Interest Company (UIR CIC), has revealed tiny plastic and fibreglass particles in its headwaters, raising urgent questions about the health of one of England’s most important freshwater ecosystems.
Citizen scientists from the local community, working with researchers, detected microfibre and microparticle pollution at every site sampled in spring 2025. Microfibres – often shed from clothing – dominated the samples, while fibreglass, rarely reported in rivers, was also present, together with tyre particles from road run-off. Such contamination can disrupt the river ecosystem, posing risks to insects, fish and mammals that depend on these chalk streams.
Continue reading “Tackling microplastic pollution in England’s rare chalk streams”

