Widespread contamination of per- and polyfluoroalkyl substances (PFAS), dubbed 'forever chemicals', has been detected across the Solent's marine food web, according to new research. Samples of seawater, seabed sediment, treated wastewater, seaweed, fish, crabs, and even harbour porpoises revealed the presence of these persistent industrial chemicals. In some instances, pollution levels in coastal waters were found to be 13 times the established safety threshold.
Wastewater Plants Identified as Key Sources
Two wastewater treatment plants, Budds Farm in Portsmouth and Peel Common in Fareham, have been pinpointed as significant contributors to PFAS contamination entering marine environments. The study suggests current wastewater treatment processes are insufficient to remove these persistent chemicals before discharge.
Broader Toxicity Concerns Highlighted
While some individual chemical samples fell within existing legal limits, a significant number failed newer European Union tests designed to assess combined toxicity, which accounts for the relative potency of mixed PFAS. Researchers stressed the importance of monitoring these chemicals as mixtures rather than in isolation to adequately protect ecosystems.
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Calls for Regulatory Overhaul
The findings have spurred calls for more robust PFAS regulation in UK waters. Scientists warn that the escalating presence of these chemicals poses long-term risks to marine biodiversity, seafood safety, human health, water quality, and coastal ecosystems. There is a growing consensus that current laws are insufficient, with some advocating for a blanket ban on PFAS as part of government water reform initiatives.
'Forever Chemicals' Explained
PFAS are a class of nearly 15,000 synthetic chemicals, widely used in consumer products and industrial processes since the 1940s and 1950s. Their extreme resistance to degradation has earned them the nickname 'forever chemicals', as they persist indefinitely in the environment and accumulate in living organisms over time.
Background:
Study Scope: Research conducted by the University of Portsmouth and the Marine Conservation Society examined PFAS levels in the Solent region.
PFAS Applications: These chemicals are found in a vast array of products, including non-stick cookware, waterproof clothing, firefighting foams, cleaning products, paints, and stain-resistant coatings.
Bioaccumulation: PFAS bioaccumulate in tissues, building up faster than they can be expelled by organisms.
International Context: While the EU is progressing with broad PFAS restrictions, the UK has stated it will consult on setting limits and is developing a PFAS plan focused on understanding and tackling sources, including enhanced monitoring and stricter rules.
