Forever Chemicals on the Farm: How PFAS-Laced Sludge Poisoned American Cropland

For decades, farmers were told they were doing something smart and green: take the treated solids left over from sewage plants — “biosolids” — and spread them on fields as cheap, nutrient-rich fertilizer. Recycle waste into food. Win-win.

It turned out to be one of the most quietly devastating contamination stories in American agriculture. Because that sludge carried PFAS — “forever chemicals” — and the farms that took it are now finding their soil, their water, their crops, and their livestock poisoned.

What PFAS are, and why “forever” is the scary word

PFAS stands for per- and polyfluoroalkyl substances — a class of thousands of synthetic chemicals used since the mid-20th century in nonstick pans, waterproof clothing, firefighting foam, food packaging, and countless industrial processes. They’re prized because they’re nearly indestructible.

That same indestructibility is the nightmare. PFAS don’t break down meaningfully in the environment or the human body. They accumulate. The EPA links PFAS exposure to serious health effects including certain cancers, immune suppression, and developmental harm — and in 2024 set the first-ever enforceable national drinking-water limits for several PFAS compounds, measured in parts per trillion. That’s how toxic they are: the safe level is almost zero.

How they got onto farms

Here’s the pipeline. Industrial and household PFAS wash down drains and into wastewater treatment plants. Those plants weren’t designed to remove PFAS — almost none can. The chemicals concentrate in the leftover solids: the biosolids. Then, for decades, those biosolids were trucked to farms and spread on fields as fertilizer, fully sanctioned by regulators who weren’t testing for PFAS because nobody was looking.

So the contamination wasn’t an accident or a spill. It was the system working as designed — just with a poison nobody was measuring.

Maine: the canary

No state has reckoned with this harder than Maine. After a dairy farm discovered shocking PFAS levels in its milk traced back to sludge spread years earlier, the state launched aggressive testing and found contaminated farms across the map. In 2022, Maine became the first state to ban the spreading of PFAS-containing sludge on farmland outright.

The human cost was brutal and specific. Civil Eats and national outlets documented Maine farmers who had to stop selling their products, watch herds become worthless, and confront the possibility that the land their family had farmed for generations was now a liability instead of an inheritance. Some had PFAS in their own blood at alarming levels. They did nothing wrong. They followed the guidance. The guidance poisoned them.

The scale nobody can fully see

Here’s the gut-punch: this almost certainly isn’t a Maine problem. It’s a national one that Maine simply chose to look at. Sludge was spread on farmland across the country for decades under the same federal framework. Most states haven’t done comprehensive testing. The EPA released a draft risk assessment acknowledging that PFAS in sewage sludge can pose risks to people living on or near affected farms — a tacit admission that the problem extends well beyond one state’s borders.

The reason we don’t have a national map of contamination is, bluntly, that nobody has wanted to draw it. Testing is expensive. The liability is staggering. And the farmers caught in it are the victims, not the polluters — yet they’re often the ones left holding the loss.

Who should pay

That’s the fight now. Farmers and states argue the chemical manufacturers — the companies that made PFAS knowing they’d persist forever — should bear the cost of cleanup and compensation, not the growers who unknowingly spread a contaminated product. Major PFAS makers have already agreed to multibillion-dollar settlements over drinking-water contamination, as Reuters reported. Farm contamination is the next front.

Some states have set up funds to compensate affected farmers and buy out unfarmable land. It’s a start. It’s nowhere near the scale of the problem.

What this means for the ground beneath us

PFAS contamination is the purest example of “poisoned ground.” It’s invisible, it’s permanent, and it landed on farms through a program everyone called responsible. The land doesn’t heal on its own — PFAS stays for generations. A farm can be ruined not by drought or debt, but by a chemical the farmer never bought, spread under a banner that said recycling.

The least we owe those farmers is to stop pretending it’s just a Maine story.

Save US Farms covers the contamination of American farmland and the growers fighting to reclaim it. If your land was sludged, the desk wants to hear from you.