California Moves to Ban PFAS Pesticides That Show Up in 9 in 10 Peaches

California — home to roughly a third of the country’s fresh produce by value — is moving to ban PFAS “forever chemical” pesticides from its fields. If it works, the rest of the country will feel it whether legislators in other states act or not.

Assembly Bill 1603, introduced by Assemblymember Nick Schultz, cleared the California Assembly in a third-reading vote and moved to the state Senate in May 2026. The bill would ban the use, sale, and manufacture of PFAS pesticides statewide by 2035. For 23 pesticides California currently permits but the European Union has already banned, the deadline tightens to 2030. New state approvals of any PFAS pesticide would pause immediately upon signing.

California’s Department of Pesticide Regulation currently allows 53 PFAS pesticides on its farms. AB 1603 would zero all of them out.

What’s actually on your fruit

PFAS — per- and polyfluoroalkyl substances — are synthetic compounds built around fluorine-carbon bonds so stable that they essentially don’t break down in soil, water, or the human body. Most of the public PFAS conversation has focused on groundwater contamination from military bases and industrial sites. The pesticide side of the equation gets less attention, but the contamination is just as real and closer to your kitchen counter.

The most common PFAS pesticide applied to food crops is fludioxonil, a fungicide used to prevent mold on tree fruit — especially stone fruit headed to grocery stores. Environmental Working Group testing published in early 2026 found fludioxonil residue in 90% of peach, plum, and nectarine samples tested nationwide. EWG also detected it in 14% of all produce samples across the full survey — the single most frequently detected pesticide residue in the entire dataset. The compound is linked to hormone disruption and reproductive harm.

Two other PFAS pesticides — fluopyram and bifenthrin — also ranked among the 10 most frequently detected chemicals across the produce supply. These aren’t fringe inputs. They are standard commercial agriculture.

The double-exposure problem

The contamination doesn’t stay on the fruit. PFAS pesticides move into soil and runoff and from there into surface water. EWG analysis of the California situation found that residents get hit in two directions at once: residue on food, and PFAS-laced agricultural runoff in drinking water supplies.

This is a separate pathway from the biosolid sludge contamination we broke down last week, where treatment-plant waste carrying PFAS gets spread on fields as fertilizer. Pesticide PFAS is applied directly at the source — through the spray nozzle, into the root zone, into everything that drains away from there. Two pipelines, same soil, same food, same water.

According to USDA, PFAS have been detected in agricultural land from multiple sources: biosolids, contaminated irrigation water, atmospheric deposition, and pesticides. The agency maintains resources and guidance for affected farmers at farmers.gov. But guidance isn’t a ban.

Who benefits if California acts

The clearest winners are organic and transitioning farmers who have already moved away from synthetic pesticides. California AB 1603 would level the competitive floor — organic growers operating without PFAS-bearing fungicides would no longer be competing against a cheaper, chemically propped alternative that externalizes its health and environmental costs onto everyone else.

Young farmers who have been betting on regenerative and low-chemical systems — like those finding early traction with transition programs this year — would get a cleaner competitive landscape if the bill passes.

The national lever is even bigger. When California bans a pesticide, growers who sell into the California market — which is nearly all major commercial produce operations — have to comply whether or not federal law follows. California has functional national power over food safety standards because no major produce company can run two separate supply chains.

This exact dynamic played out with chlorpyrifos, a neurotoxic insecticide California banned in 2019. The EPA revoked its food-use tolerance in 2021, following years behind California’s lead.

Who’s pushing back

The pesticide industry hasn’t conceded. Critics of AB 1603 argue the 2035 deadline is too short to develop and register PFAS-free alternatives at commercial scale, particularly for fungal disease management in stone fruit — the exact crops where fludioxonil is most heavily applied. Peach growers in particular have limited organically approved fungicide alternatives for the mold problems fludioxonil was designed to address.

A separate objection comes from researchers who argue that a class-wide PFAS ban treats compounds with very different risk profiles identically. The science on individual PFAS pesticide toxicity is uneven; some industry and academic voices say compound-by-compound regulatory review is more defensible than blanket prohibition.

Those arguments haven’t stopped the bill’s march through the legislature so far. AB 1603 advanced through key appropriations panels in May 2026, per EWG tracking, alongside three other EWG-backed bills targeting different toxic exposures.

The national gap California is filling

The consolidated agrochemical industry that produces most of these compounds is the same one that controls an outsized share of seed and input supply — a market structure we’ve been tracking as it tightens. The four companies that control the lion’s share of pesticide manufacturing have the resources and the regulatory relationships to slow federal action for years.

California, by acting at the state level, creates regulatory pressure that bypasses a stalled federal process. It won’t fix every acre: roughly 70 million acres of US farmland already carry estimated PFAS contamination from biosolid fertilizer, a number derived from biosolids industry estimates that USDA uses in its planning. AB 1603 doesn’t clean up what’s already in the ground.

But it closes one of the primary active pathways that keeps putting more in.

The California Senate will take up the bill after the summer. If it passes and is signed, the 2030 deadline for EU-banned compounds kicks in first — fast enough that growers will need to start transitioning almost immediately. Watch for the Senate committee hearings later this summer.

Priya Sundaram covers soil, climate, and contamination for the Save US Farms desk. Tips on PFAS farm testing, biosolid sludge spread, and pesticide policy: the desk reads everything.