PFAS in Well Water: How to Test and Find a Certified Lab Near You

Forever chemicals, the nickname for per- and polyfluoroalkyl substances (PFAS), have turned up in places most families never expected. Private well water is one of the most overlooked sources of PFAS exposure, and unlike public water systems, nobody is required to test your well for you. If you rely on a private well, that responsibility falls on you. Below, we cover how to get your water tested, what the results actually mean, and the simplest steps to cut your family’s exposure starting today.

For more on PFAS-free living, see our guide to PFAS free cutting boards and PFAS free carpet.

Why PFAS in Well Water Is a Serious Concern

A growing body of research, including work published in peer-reviewed environmental health journals, confirms that PFAS contamination in groundwater is widespread and getting worse. These chemicals seep into aquifers from industrial sites, military bases, landfills, and even agricultural runoff where biosolids have been applied as fertilizer. Once in groundwater, PFAS persist for decades because they simply do not break down.

Your liver and kidneys work hard to process these chemicals, but PFAS accumulate in the body faster than they are eliminated. The EPA has set a maximum contaminant level of 4 parts per trillion for PFOA and PFOS in public drinking water, but private wells have no federal monitoring requirement. That means contamination can go undetected for years.

How to Find a Certified PFAS Testing Lab Near You

Getting your well water tested for PFAS is easier than most people think:

• Start with your state health department. Most states maintain a list of certified environmental testing labs. Search for “[your state] PFAS water testing lab” or call your local health department directly.
• Look for EPA Method 537.1 or 533 certification. These are the gold standard testing methods for PFAS in drinking water. Any reputable lab will use one of them.
• Expect to pay between $200 and $400. A comprehensive PFAS panel typically tests for 20 to 40 individual PFAS compounds. Some states offer subsidized testing programs, so check before you pay out of pocket.
• Use a proper sampling kit. The lab will send you a kit with specific instructions. Follow them carefully, because PFAS contamination from household products can throw off results if you do not use the right collection bottles.
• Check the PFAS Free Life Database for verified clean products across hundreds of categories while you wait for results.

What Your Well Water Test Results Mean

When your results come back, you will see a list of individual PFAS compounds measured in parts per trillion (ppt). The numbers break down roughly like this:

• Below 4 ppt for PFOA and PFOS individually: Meets the EPA’s current maximum contaminant level for public water systems. While private wells are not legally bound by this standard, it is a reasonable benchmark.
• 4 to 70 ppt: A gray area. Many health experts recommend filtration at these levels, particularly if children or pregnant women are in the household.
• Above 70 ppt: The EPA’s older health advisory level. At this concentration, filtration or an alternative water source is strongly recommended.

Total PFAS levels matter too, not just individual compounds. A well with low levels of many different PFAS can still pose a real cumulative risk.

Best Water Filters for Removing PFAS From Well Water

Not all water filters are created equal when it comes to PFAS. Standard carbon pitcher filters catch some PFAS, but the most effective household options are reverse osmosis systems and activated carbon block filters specifically rated for PFAS removal.

One trusted product to consider: Clearly Filtered 3-Stage Water Pitcher (Tested for PFAS), which is independently tested to remove over 99% of PFAS from drinking water.

When choosing a filter, look for:

• NSF/ANSI 53 or P473 certification for PFAS reduction
• Third-party test results published by the manufacturer
• Activated carbon block or reverse osmosis technology, which outperform granular activated carbon for PFAS
• Regular filter replacement schedules, because a saturated filter stops removing contaminants

For a full comparison, check out our guide to top PFAS free water filters, and for whole-house solutions, see our reverse osmosis system guide.

Additional Steps to Reduce PFAS Exposure at Home

Beyond filtering your drinking water, a few daily habits help reduce overall exposure:

• Ventilate your home regularly. PFAS can off-gas from household products and settle into dust, which is a significant exposure route for young children who play on floors.
• Wash new items before first use. This reduces surface chemical loads from manufacturing treatments.
• Choose food-grade materials for anything that touches food or skin directly, like glass or stainless steel containers.
• Test again in 12 months. PFAS levels in groundwater can change over time as contamination plumes shift, so annual retesting is a good practice for well owners.

For more product swaps across every room in the house, browse the PFAS Free Life Database.

Frequently Asked Questions

What health risks are linked to PFAS in well water?

PFAS exposure through contaminated drinking water has been associated with elevated cholesterol, immune system disruption, thyroid disease, hormone interference, and in some cases increased cancer risk. Children and pregnant women are considered especially vulnerable. Reducing exposure through water filtration and product swaps can lower your body burden over time, because PFAS do eventually clear from the body once exposure stops.

How do I know if my well water has PFAS?

The only reliable way to know is laboratory testing. Standard home water test kits do not screen for PFAS. Contact your state health department for a list of certified labs, or search for labs that use EPA Method 537.1 or 533. You can also check whether your area has known PFAS contamination sources by searching the EPA’s PFAS contamination map.

Can a standard Brita filter remove PFAS from well water?

Standard granular activated carbon filters like Brita reduce some PFAS, but they are not the most effective option. For well water with confirmed PFAS contamination, a reverse osmosis system or an activated carbon block filter rated for PFAS removal (look for NSF P473 certification) will give you much better protection. The PFAS Free Life Database lists verified clean water filtration products.

*Research reference: Environmental International 2021

Environmental Health Perspectives 2020*