PFAS Groundwater Contamination: What It Means for Your Well

If your home runs on a private well, here’s something worth knowing: the EPA’s new PFAS drinking water standards, finalized in 2024, only cover public water systems. Private wells sit completely outside that framework. Testing, treatment, remediation - all of it falls on you.

And PFAS contamination in well water isn’t rare. States like Michigan, Delaware, and New York have expanded free testing programs for private wells after finding contamination in areas nobody expected. If you live near a military base, airport, industrial site, or wastewater treatment plant, your well water could have forever chemicals in it. You won’t see, smell, or taste them.

We also have guides to PFAS free Gore-Tex alternatives and PFAS free camping gear if you’re working through other parts of your household too.

What’s Inside

• How PFAS Get Into Groundwater
• Why Private Well Owners Are at Higher Risk
• Health Risks of PFAS in Well Water
• How to Test Your Well for PFAS
• Filtration Systems That Work for Well Water
• Steps to Protect Your Family Today

How PFAS Get Into Groundwater

PFAS don’t just show up in groundwater on their own. They get there through specific pathways: AFFF firefighting foam used at military bases and airports, industrial discharge from manufacturing plants, landfill leachate seeping into the water table, and biosolids (treated sewage sludge) spread on farmland as fertilizer.

Once they’re in the soil, PFAS migrate downward through rock and sediment until they hit the water table. These chemicals don’t break down naturally, so they can travel long distances underground. A factory that discharged PFAS decades ago can still be contaminating wells miles away.

Why Private Well Owners Are at Higher Risk

Public water utilities are now required to test for PFAS and treat their water to meet the EPA’s new limits (as low as 4 parts per trillion for PFOA and PFOS). But if your home is on a private well, you have no such protection. No one is required to test your water. No one is required to treat it. And standard mortgage potability tests typically omit PFAS entirely.

That gap means millions of private well owners could be drinking PFAS-contaminated water without knowing it. Michigan is a good example: the state launched a widespread private well testing program and found PFAS in areas that had never been flagged as high risk.

Health Risks of PFAS in Well Water

A 2023 review in Toxicological Sciences summarized evidence connecting PFAS to thyroid disruption, immune system changes, and developmental concerns in children. Research in Environmental Research found associations with elevated cholesterol, reduced vaccine response, and increased cancer risk.

For families on well water, the exposure is constant. This isn’t the occasional contact you get from a PFAS-treated jacket or pan. Contaminated drinking water delivers these chemicals to every person in the household, through every glass of water, every pot of coffee, every ice cube, every day.

How to Test Your Well for PFAS

Testing has gotten easier and more affordable over the past few years. Here’s what’s available:

• Certified lab testing through companies like SimpleLab or Tap Score uses EPA-approved methods (Method 537.1 or 533) to detect PFAS at parts-per-trillion levels. Budget $150 to $400 per sample, with results in 5 to 10 business days.
• State programs are expanding. Delaware, Michigan, New York, and several other states now offer free or subsidized PFAS well testing for private well owners. Check your state health department’s website to see if a program is available near you.
• What the results mean: The EPA’s health advisory levels are 4 ppt for PFOA and PFOS individually, and 10 ppt for several other PFAS compounds. If your results are above these numbers, it’s time to get a filter.

Filtration Systems That Work for Well Water

Not all filters remove PFAS. Here’s what actually works:

Reverse osmosis is the most thorough option for drinking water. It filters at the molecular level and catches virtually all PFAS compounds, including the shorter-chain varieties that carbon filters miss. The Aquasana AQ-5200 2-Stage Under Counter Filter is a good under-sink option at a moderate price. For a deeper comparison, see our guide to PFAS free reverse osmosis systems.

Whole-house carbon filtration treats all the water entering your home, showers and laundry included. The iSpring WGB32B-PFKS 3-Stage Whole House Water Filter combines sediment filtration, KDF/GAC, and a dedicated PFAS carbon stage. It’s SGS-tested to reduce up to 99% of PFOA and PFOS at flow rates up to 15 GPM. If your test results come back high, this is the kind of system worth considering.

Countertop reverse osmosis is the easiest route for renters or anyone who doesn’t want to touch plumbing. The AquaTru Classic Countertop Reverse Osmosis sits on your counter, requires no installation, and carries NSF/ANSI P473 certification for PFOA and PFOS reduction.

Steps to Protect Your Family Today

If you’re on well water, here’s where I’d start:

• Test your well. Don’t guess. A $200 lab test tells you exactly what you’re dealing with. If it comes back clean, that’s great. If not, you’ll know what filter to buy.
• Install a point-of-use filter on your kitchen faucet while you figure out whole-house options. Even a certified pitcher filter can cut PFAS levels in your drinking water significantly.
• Store food and water in glass or stainless steel instead of plastic. This also reduces PFAS exposure from food packaging.
• Check your cookware for PFAS coatings. Our PFAS free cookware guide has the rundown.
• Look into state programs. More states are adding testing and financial help for private well owners every year. Your county extension office or state health department can point you in the right direction.

The PFAS Free Life Database has a searchable list of verified PFAS-free products across dozens of categories.

Frequently Asked Questions

How do I know if my well water has PFAS?

The only reliable way to know is through laboratory testing. Standard well water tests for real estate transactions do not include PFAS. You need to specifically order a PFAS panel using EPA Method 537.1 or 533. Companies like SimpleLab offer mail-in test kits for $150 to $400, and several states now provide free testing for private well owners. If you live near a military base, airport, industrial facility, or former firefighting training area, testing is especially important.

Are private wells regulated for PFAS?

No. The EPA’s 2024 PFAS drinking water standards apply only to public water systems. Private well owners are responsible for their own testing and treatment. Some states have begun offering voluntary testing programs and financial assistance for well owners, but there is currently no federal requirement for private well PFAS monitoring. This regulatory gap is why proactive testing is so important.

What type of water filter removes PFAS from well water?

Three types of filtration systems are effective for PFAS removal. Reverse osmosis (RO) is the most thorough option for drinking water, catching virtually all PFAS compounds at the molecular level. Granular activated carbon (GAC) whole-house systems can reduce PFAS across all your home’s water if properly sized, with media replacement every 6 to 18 months. Anion ion exchange (AIX) systems target elevated PFAS specifically and work well for stubborn short-chain compounds. Look for filters with NSF/ANSI P473 certification or independent lab testing showing PFAS reduction rates.

*Research references: Toxicological Sciences 2023

Environmental Research 2022

EPA PFAS and Private Wells*