PFAS Water Testing: How to Choose a Certified Lab Near You

You can swap out every pan in your kitchen, ditch the nonstick, switch to glass food storage, and still be drinking PFAS every single day if your tap water is contaminated. I know that sounds discouraging, but here is the flip side: testing your water is one of the most useful things you can do, because it tells you exactly where you stand.

The tricky part? Finding a lab that actually does the job right. Some test for only a few PFAS compounds. Others use outdated methods. And the price range is all over the map. Here is how to sort through it.

For more on PFAS-free living, see our guide to PFAS free gardening supplies and PFAS free menstrual products.

Why bother testing your water for PFAS?

Because you cannot smell it, taste it, or see it. Research published in Frontiers in Environmental Chemistry confirms that PFAS exposure from everyday sources adds up in your body over time. Your liver and kidneys try to process these chemicals, but PFAS accumulate faster than your body can clear them.

Knowing your water’s PFAS levels helps you make a practical decision. Maybe you need a whole-house filtration system. Maybe a pitcher filter is enough. Maybe your water is already clean and you can focus your energy (and budget) elsewhere. You will not know until you test.

What to look for in a PFAS testing lab

There is a wide gap between a lab that gives you useful data and one that wastes your money. Here is what matters:

EPA-certified methods are non-negotiable. You want a lab using EPA Method 533 or EPA Method 537.1. These are the gold standards for detecting PFAS in drinking water.

Low detection limits matter because the EPA health advisory for PFOA and PFOS is 4 parts per trillion (ppt). Your test needs to measure well below that threshold, or it is basically useless for decision-making.

Broad compound coverage is worth paying for. Some labs test for only a handful of PFAS. You want a panel covering at least 30 to 40 compounds, including GenX and other newer replacements that are showing up in water supplies.

Accreditation from The NELAC Institute (TNI) or a state environmental laboratory certification program adds another layer of confidence.

You can also check the PFAS Free Life Database for water testing and filtration resources.

How to collect and submit a water sample

Most certified labs mail you a sample collection kit with instructions. It is pretty straightforward, but a few details can throw off your results if you are not careful:

1. Run your tap for 2 to 3 minutes before collecting, unless you specifically want to test standing water in your pipes.
2. Use only the containers provided by the lab. PFAS can leach from certain plastics, so the sample bottles are chosen to avoid contamination.
3. Skip the soap and hand lotion before handling the sample container. Many personal care products contain PFAS, and even trace amounts on the bottle can skew results.
4. Ship it quickly. Most labs want samples back within 24 to 48 hours of collection for the most reliable readings.

While you wait for results, a ZeroWater 10-Cup Ready-Pour Filter Pitcher is an affordable first step for reducing PFAS in your drinking water right away.

What to do after you get your results

When your lab report arrives, compare your numbers against the EPA’s current health advisory levels. If your water shows PFAS above 4 ppt for PFOA or PFOS, a filtration system is worth the investment. I would start with these resources:

• Our PFAS free water filters guide covers what actually works and what is marketing fluff
• Reverse osmosis for PFAS removal is the most effective household method
• While you are at it, check your food packaging with our PFAS free food storage bags guide
• And take a look at your cookware with the PFAS free cookware guide

You do not have to fix everything at once. Pick the biggest exposure sources first and work outward from there. The PFAS Free Life Database is a great companion for checking products as you go.

Frequently Asked Questions

How much does PFAS water testing cost?

Most certified PFAS water tests run between $200 and $400 for a comprehensive panel that covers 30 or more PFAS compounds. Some labs offer basic screening panels for less, but these may only test for a handful of the most common compounds. At-home test kits from companies like Tap Score or SimpleLab typically fall in the $150 to $300 range, with results in about two weeks.

Can home test kits detect PFAS in water?

Some home test kits can detect PFAS, but the quality varies widely. Look for kits that send your sample to a certified lab using EPA Method 533 or 537.1 rather than kits that claim instant results. Tap Score and SimpleLab are two services that mail you a collection kit and process samples at accredited labs.

What PFAS level in water is considered safe?

The EPA’s current health advisory levels are 4 parts per trillion (ppt) for PFOA and PFOS individually. Many health advocates argue that no level of PFAS is truly safe. Several states have set their own limits, some stricter than the federal guidance. If your results show any detectable PFAS, a high-quality water filter is a worthwhile investment.

*Research reference: Frontiers in Environmental Chemistry 2024

Environmental Health 2021*