Does dairy milk from farms near PFAS contamination sites contain PFAS?

What's actually in it

Dairy cows drink water and eat grass and feed grown on soil. When the water or soil is contaminated with PFAS from nearby industrial sites, military bases that used PFAS-containing firefighting foam, or fields that received PFAS-contaminated biosolids, PFAS enter the food chain. Cows absorb PFAS and concentrate them in milk fat.

PFAS contamination zones in the US and Europe are documented around hundreds of industrial and military sites. Farms within these contamination plumes produce milk that reflects the contamination. Regular testing at these farms isn't mandatory, and contamination often isn't discovered until residents raise concerns.

What the research says

A 2026 study in J Agric Food Chem compared PFAS in milk from Swedish farms near documented contamination sites against milk from regional dairy production facilities. Milk from contamination-zone farms had dramatically higher PFAS concentrations, with some samples exceeding European guidance values by wide margins.

The study found PFOS and PFOA at the highest levels, as well as newer PFAS compounds not yet included in all regulatory guidelines. The contamination pattern matched the source: farms closer to known contamination sites had higher milk PFAS levels.

For consumers, there's no reliable way to know whether the dairy you buy comes from a farm in a PFAS contamination zone. In the US, states near military bases and certain industrial corridors have higher contamination risk. Organic dairy doesn't guarantee lower PFAS since contamination comes from the soil and water, not farming practices. Some people choosing to reduce dairy PFAS exposure switch to oat or other plant-based milk alternatives.