Can eating fish give you PFAS contamination?

What's actually in it

Fish swim in water contaminated with PFAS from industrial discharge, sewage, and runoff. These chemicals accumulate in fish muscle tissue over the animal's lifetime. When you eat the fish, you eat the PFAS too.

Unlike mercury, which concentrates in large predatory fish, PFAS show up in fish of all sizes and species. Both ocean fish and freshwater fish carry these chemicals.

What the research says

A 2026 study in Mar Pollut Bull tested PFAS levels in the muscle tissue of marine and freshwater fish. The researchers then calculated how much PFAS people would absorb from eating these fish regularly.

PFAS were detected in fish from both salt water and fresh water. Freshwater fish generally had higher levels than marine fish, likely because rivers carry more concentrated PFAS pollution from cities and factories.

The estimated human exposure from regular fish consumption was meaningful but not extreme. Eating fish a few times a week adds a measurable amount to your total PFAS burden, on top of what you get from nonstick pans, food packaging, and drinking water.

Fish is still a healthy protein choice. But if you're trying to lower your total PFAS exposure, knowing that fish is one more source helps you make informed decisions about which fish to eat and how often.