Check your state for PFAS before you fill their bowl

Which state do you live in?

We'll pull your state's results from the EPA's national testing.

Choose your stateI'm outside the US Next

Do you live in a city or out in the country?

Where does your tap water come from?

How does your cat get water now?

Your {state} result

Here's what EPA testing found in {state}

What else to know

• USGS puts the chance of PFAS in city tap water at about 75%.
• USGS puts the chance of PFAS in rural tap water at about 25%. Lower, but not zero.
• The EPA's testing covered public water systems, not private wells. USGS says testing is the only way to know what's in a well.
• The EPA's health goal for PFOA and PFOS in drinking water is zero.
• You can't see, taste or smell PFAS, so clear water tells you nothing.

What this means for my catLook up your own water system by zip code at the EWG Tap Water Database.

Source: EPA UCMR 5, final data (testing 2023 to 2025, released 2026). "Turned up" means at least one of 29 PFAS was measured at or above the EPA's reporting level in at least one sample. "Above the 4 ppt level" uses the EPA's own averaging method from its July 2026 Data Summary, for PFOA and PFOS (4 parts per trillion is the limit the EPA set in 2024). The EPA says these results don't show whether a system meets the rules. The systems tested are mostly ones serving 3,300 people or more, plus a sample of smaller ones.

Your result · outside the US

Here's what testing found around the world

What else to know

• That's water in the ground, not what comes out of your tap. It shows how far PFAS has spread.
• In the EU, a limit on 20 PFAS in drinking water took effect in January 2026.
• Canada set a drinking water goal for 25 PFAS in 2024.
• You can't see, taste or smell PFAS, so clear water tells you nothing.
• Ask your local water supplier for its latest water quality report.
• On a private well, testing is the only way to know what's in it.

What this means for my cat

Sources: Ackerman Grunfeld et al., Nature Geoscience, 2024 (more than 45,000 surface and groundwater data points from about 20 years of studies; 69% of groundwater samples with no known contamination source exceeded Health Canada's criteria). EU Drinking Water Directive 2020/2184 (0.1 µg/L for the sum of 20 PFAS, from 12 January 2026). Health Canada, Objective for PFAS in Canadian drinking water (30 ng/L for the sum of 25 PFAS, 2024).

What scientists have found in cats

• Swedish researchers found forever chemicals in every pet cat they tested (2021).
• In a study of 72 US cats, indoor cats carried the most PFAS (2016).
• In a 2026 study from Japan, cats carried more of some forever chemicals than dogs.

Why that should worry you

• Among those 72 US cats, higher PFAS levels were linked to thyroid disease, liver disease and possibly kidney disease.
• California researchers found that cats with an overactive thyroid had more PFOA, one type of PFAS, in their blood (2018).
• In people, PFAS is linked to kidney cancer, a weaker antibody response and higher cholesterol.
• Once it's in the body, PFAS can stay there for years.
• Researchers point to house dust and food. The EPA says drinking water can be a source too, where supplies are contaminated.
• And your cat drinks your tap water every day.

Here's what you can change: the water in their bowl

• Filter it. Activated carbon pulls out chlorine and catches hair, dust and sediment, every time the water goes around.
• Keep the dust out. Still water in a bowl collects hair, dust and food bits all day. Filtered water that keeps moving doesn't let it sit.
• Get it out of plastic. Plastic scratches, and slime builds up in the scratches. Their bowl should be stainless steel.

Right now, your cat drinks from a bowl that sits still all day.

Right now, your cat drinks from a plastic fountain. Plastic scratches, and bacteria build up in the scratches as a slimy film called biofilm.

Right now, your cat drinks from the sink, so they only drink when someone turns it on.

You already give your cat moving water. Keep the bowl clean and the water fresh.

Show me what helps

Weiss et al., 2021 (Sweden). Bost et al., 2016 (US, 72 cats). Wang et al., 2018 (California). Ehime University, 2026 (30 cats, 23 dogs). National Academies, 2022. US EPA. IVIS.

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