A 2025 study found PFAS in all 13 fish samplescollected from Iowa streams.
Why it matters: Iowa doesn’t routinely test fish for PFAS, while states including Pennsylvania, Michigan and Wisconsin have issued “do not eat” advisories after finding high levels in fish.
Caveat: Researchers from the U.S. Geological Survey, University of Iowa and other institutions tested mostly small whole fish.
- The study was not designed to determine whether the fish were safe to eat.
Yes, but:Iowa researchers say the findings warrant more monitoring…