Swedish crayfish contain high levels of PFAS chemicals, according to an analysis by the research company Testfakta.
The analysis shows that anyone who eats more than a handful of crayfish can ingest more PFAS than is appropriate in a week.
It is not clear why Swedish crayfish in particular have so much PFAS. Foreign crayfish had significantly lower PFAS values in the test.
https://sverigesradio.se/artikel/hoga-halter-pfas-i-svenska-insjokraftor