Montana's 2026 PFAS Fish Advisories, What Anglers and Families Should Know

What did Montana agencies just announce?

On April 24, 2026, the Montana Department of Public Health and Human Services (DPHHS), the Department of Environmental Quality (DEQ), and Fish, Wildlife & Parks (FWP) jointly released new PFAS fish consumption advisories along with the results of a statewide fish tissue study, according to Montana.gov. The agencies tested fish from multiple Montana waterbodies for per- and polyfluoroalkyl substances (PFAS), a group of long-lasting "forever chemicals" linked to a range of health concerns. Based on the results, DPHHS issued specific guidance on how much fish from certain waters is advisable to eat, and how often.

This kind of advisory is not unique to Montana. States across the country have been finding PFAS in freshwater fish because these chemicals move through soil, groundwater, and surface water, then accumulate in the tissue of fish that live in contaminated areas over their lifetimes.

Who is affected by this advisory?

Anyone who regularly eats fish caught in the affected Montana waterbodies is potentially affected, according to the state agencies. That includes recreational and subsistence anglers, tribal members who rely on local fish as a food source, and families who fish with children. Because PFAS can build up in the body over time, frequent consumers of fish from impacted waters face more exposure than occasional visitors who fish once or twice a year.

Children, pregnant women, and people who eat fish as a primary protein source are generally considered higher-priority groups for following consumption guidance closely, though the specific advisory limits vary by waterbody and species, per DPHHS.

Why does this matter for your health?

PFAS exposure has been associated in scientific studies with several health effects, including changes in cholesterol levels, immune system responses, and other outcomes, according to federal health agencies such as the EPA and ATSDR. It's important to be clear that these are associations observed in research, not proof that any individual's health issue was caused by fish consumption. Still, because PFAS build up in the body and don't break down easily, agencies recommend reducing unnecessary exposure where practical.

Fish is just one route of PFAS exposure. These chemicals also show up widely in everyday consumer goods, from cosmetics to outdoor gear, because manufacturers have historically used PFAS for water-, stain-, and grease-resistance. PFAS Authority's own scoring of 1,962 products found that 45% failed our PFAS and toxin screen, with entire categories, including camping tents and tarps, waterproof mascara, ski and snowboard jackets, rain jackets, and waterproof boots, showing 100% failure rates among items we've scored. That means fish advisories are one piece of a much larger exposure picture that includes what you wear, apply, and use at home.

What should you do now?

First, check the specific advisory details released by DPHHS, DEQ, and FWP for the waterbody where you fish, since limits vary by location and species. Following posted guidance on how many meals per month are advisable is the most direct step recommended by the agencies.

Second, consider varying where your fish comes from. Eating fish from multiple sources, including waters not flagged in the advisory, can help reduce concentrated exposure from any single contaminated site.

Third, look at your broader PFAS footprint beyond fish. Since PFAS Authority scores products using published ingredients, materials, certifications, and disclosures rather than laboratory testing, you can use our product finder to check specific brands and categories before buying items like rain jackets, waterproof boots, or cosmetics. It's worth noting that some major brands, including Dove, Amazon Basics, Garnier Fructis, KitchenAid, Clinique, Verb, Cantu, and Redken, disclose nothing about PFAS in their products, according to our research, which makes it harder for consumers to make informed choices without independent screening.

If you want to understand exactly how we evaluate products and assign scores, our methodology page walks through the criteria in detail.

Bottom Line

Montana's new fish consumption advisories reflect real findings from state testing, not a reason to avoid all local fish altogether. Following the specific guidance from DPHHS, DEQ, and FWP for your fishing location is the most practical way to manage exposure while still enjoying Montana's waters. At the same time, fish is only one exposure pathway among many, everyday products carry their own PFAS concerns, and checking them independently can help you lower overall risk where it's within your control.

Frequently Asked Questions

Does this advisory mean all Montana fish are unsafe to eat?

No. The advisories apply to specific waterbodies and species tested by the state, according to DPHHS, DEQ, and FWP. Fish from other locations may carry lower concern, but it's best to check the official advisory list for the specific water you fish before assuming any blanket status.

How do PFAS get into fish in the first place?

PFAS from industrial discharge, firefighting foam, wastewater, and other sources can enter soil and water systems, where fish absorb the chemicals over their lifespan, according to state and federal agencies. Because PFAS resist breaking down, they tend to accumulate in fish tissue over time rather than flushing out.

What's the difference between "failed" products and unsafe products?

A product flagged by PFAS Authority's screen has ingredients, materials, or a lack of disclosure that raises concern based on published data, it's not a lab-confirmed contamination result. We describe such items as having lower or higher concern rather than labeling anything flatly "safe" or "unsafe," since screening is based on disclosed information, not direct testing.