Best PFAS Water Testing Kit: Lab Tests That Detect It
Some links below are affiliate links. If you buy through one we may earn a commission, at no extra cost to you. It does not change which system we recommend.
No test strip detects PFAS. The compounds are measured in parts per trillion, thousands of times below what a colour-change strip can resolve. Detecting PFAS at home means collecting a sample and sending it to a certified lab running EPA Method 537.1 or 533.
US EPA drinking water regulation and published analytical methods.
The best PFAS water testing kit for most homeowners is the Tap Score PFAS Water Test by SimpleLab ($89–$199 depending on panel size). It uses an EPA-certified laboratory and tests for 30–40 PFAS compounds using Method 533, which is the current standard the EPA uses for public water supply testing. Strip tests and at-home test kits cannot detect PFAS — laboratory analysis is the only method that works. If you’re on a private well or live near an industrial site, airport, or military base, testing for PFAS before choosing a filter is a critical first step.
Why Most Home Tests Won’t Detect PFAS
PFAS (per- and polyfluoroalkyl substances) are measured in parts per trillion — concentrations so low that consumer test strips simply cannot register them. The EPA’s new enforceable limit for PFOA and PFOS, finalized in 2024, is 4 parts per trillion (ppt). That’s four molecules per trillion molecules of water.
Only liquid chromatography-tandem mass spectrometry (LC-MS/MS) performed in a certified laboratory can reliably measure concentrations that low. Any “at-home PFAS test” claiming to give results without a lab is not detecting PFAS — it’s detecting other contaminants or selling false reassurance.
The good news: you can get accurate PFAS testing done at home by collecting a water sample yourself and mailing it to a certified lab. Several services make this straightforward.
Comparison Table
| Kit | Lab Method | PFAS Compounds Tested | Turnaround | Price | Best For |
|---|---|---|---|---|---|
| Tap Score Standard PFAS | EPA Method 533 | 30 compounds | 5–7 business days | $89 | Most homeowners |
| Tap Score Advanced PFAS | EPA Method 533 + 537.1 | 40+ compounds | 7–10 business days | $199 | Near industrial sites or military bases |
| National Testing Labs PFAS Panel | EPA 537.1 | 18 compounds | 10–14 business days | $130 | Budget comprehensive |
| Simco PFAS Test | EPA 533 | 25 compounds | 7–10 business days | $110 | Secondary option |
| Water Quality Association (local lab) | Varies | Varies | Varies | $80–$250 | Local lab preference |
#1 Tap Score Standard PFAS Test — Best Overall
Price: ~$89 | Method: EPA 533 | Compounds: 30 | Turnaround: 5–7 business days
Tap Score by SimpleLab is the clearest, most user-friendly PFAS testing service available to US homeowners. You order online, receive a collection kit with a pre-labeled bottle and prepaid return label, collect your tap water sample, and mail it back. Results arrive as a detailed digital report that flags each compound against both the new EPA maximum contaminant levels and the lower health advisory limits.
Tap Score’s lab is NELAP-certified and uses EPA Method 533, which is the most current PFAS detection method — it identifies short-chain PFAS compounds that older Method 537.1 misses.
What we like:
– Clear, consumer-friendly reporting — flags exceedances in red and explains what each compound is
– Tests for 30 PFAS compounds in the standard panel, including PFOA, PFOS, PFBS, GenX, and shorter-chain variants
– EPA Method 533 — current gold standard, catches newer PFAS that older labs miss
– Prepaid return shipping included
– Results within 5–7 business days — faster than most labs
What we don’t like:
– Does not test for non-PFAS contaminants — if you want lead, nitrates, or bacteria, you’ll need a separate panel
– $89 is a reasonable price but adds up if you’re testing multiple taps
Who should order this: Anyone on a private well, anyone within 10 miles of an airport, military base, or industrial site, anyone in a zip code flagged by EPA’s PFAS monitoring data, and anyone buying a home with an unknown water source history.
Who can skip it: Renters or owners connected to a municipal water system that has already published PFAS results below the new EPA limits. Check your water utility’s Annual Water Quality Report first — it’s free and available at EPA’s right-to-know portal.
The Tap Score Standard PFAS test removes 99% of PFAS compounds when used to verify whether filtration is needed or working correctly. It is the test most water treatment professionals recommend for residential PFAS screening.
#2 Tap Score Advanced PFAS Test — Best for High-Risk Areas
Price: ~$199 | Method: EPA 533 + 537.1 | Compounds: 40+ | Turnaround: 7–10 business days
The Advanced PFAS panel covers everything the Standard panel does, then adds older-method compounds, industrial PFAS precursors, and compounds associated specifically with firefighting foam (AFFF). If you live near a military installation, a commercial airport, a known contamination site in EPA’s PFAS tracker, or a manufacturing facility that uses PFAS in its process, this is the appropriate starting point.
At $199, it’s the most comprehensive consumer-accessible PFAS test in the US. A full industrial laboratory characterization run through EPA’s Superfund program would be more exhaustive, but for residential decision-making this panel gives you everything you need.
#3 National Testing Laboratories PFAS Panel
Price: ~$130 | Method: EPA 537.1 | Compounds: 18 | Turnaround: 10–14 business days
National Testing Laboratories (NTL) has been in the water testing business since 1977 and is a well-regarded option for homeowners who want a known, established lab. The PFAS panel uses EPA Method 537.1, which is the older standard — it misses some short-chain PFAS that Method 533 catches, so the compound count (18 vs. 30) reflects a narrower screen, not just a smaller panel.
For most municipal water situations where contamination, if present, is likely from traditional long-chain sources (PFOA, PFOS from manufacturing or fire suppression), NTL’s panel is adequate. For private wells near airports or DoD sites, the Tap Score Advanced panel is a better fit.
NTL’s results typically take 10–14 business days — slower than Tap Score, which matters if you’re making a filter purchase decision and want results quickly.
What PFAS Levels Mean — and What to Do If You Test High
The EPA’s final rule (effective 2026) sets enforceable maximum contaminant levels (MCLs) of:
- PFOA: 4 ppt
- PFOS: 4 ppt
- PFNA, PFHxS, HFPO-DA (GenX): 10 ppt individually
- Mixtures of PFNA, PFHxS, HFPO-DA, and PFBS: 1 (hazard index — unitless)
These limits apply to public water systems. Private wells are not regulated — your results are compared against these levels as a health benchmark, not an enforcement standard.
If your test comes back below 4 ppt for PFOA and PFOS: Your water meets the new federal standard. Continue monitoring annually if on a private well.
If results are 4–10 ppt: You’re above the enforceable limit. A quality reverse osmosis system certified under NSF/ANSI 58 removes over 95% of PFAS at the tap. A whole house carbon block filter certified under NSF/ANSI 58 for PFAS can protect the whole house.
If results exceed 10 ppt: Treat this as a priority. Stop drinking or cooking with unfiltered tap water immediately. An NSF 58-certified RO system should be installed at the drinking tap within days, not weeks.
How to Collect a PFAS Water Sample Correctly
PFAS can contaminate your sample during collection if you use the wrong container or technique. Follow these steps for accurate results:
- Use only the sample bottle provided by the lab. Never substitute a household container — PFAS leach from plastics and can contaminate the sample.
- Do not pre-rinse the sample bottle. Labs pre-treat sample bottles with a chemical preservative.
- Run the cold water tap for 60 seconds before collecting. This flushes standing water from household pipes and gives you a representative sample from the water main.
- Fill the bottle completely, capping tightly with no air space.
- Refrigerate and mail the same day or next morning using the prepaid label.
One sample from your primary drinking tap is sufficient for household screening. If you want to compare filtered vs. unfiltered results to verify your system is working, collect a second sample from before the filter’s output port.
FAQ
Can I trust the PFAS results on my municipal water report?
For the most part, yes — but with caveats. Utility-reported data is averaged over the testing period and may not reflect seasonal variation or distribution-system contamination between the treatment plant and your tap. If you live in an older neighborhood with aging service lines, testing at your specific tap is more reliable than the utility average.
Do Brita or similar pitcher filters remove PFAS?
Standard activated carbon pitcher filters like Brita are not certified to remove PFAS at the concentrations the EPA now regulates. Reverse osmosis systems certified to NSF/ANSI 58 for PFAS removal are the most reliable option at the point of use. Some premium pitcher filters (like Clearly Filtered) claim PFAS removal, but NSF 58 certification on an RO system is the highest-confidence standard.
How often should I test for PFAS?
Once when establishing a baseline. Then every 1–2 years if on a private well, or after any known contamination event near your water source (new industrial development, nearby fire suppression activity, flooding). After installing PFAS filtration, retest using a post-filter sample to verify the system is working.
Is testing my water for PFAS required?
For private wells, no — but it’s strongly recommended. For municipal users, your utility must test and report under the new EPA rule. Check your most recent Annual Water Quality Report or the EPA’s PFAS monitoring database.
Will my insurance cover PFAS remediation if levels are high?
Standard homeowner’s insurance does not cover PFAS remediation costs. Some states have specific programs for private well owners in contaminated areas. Check your state’s environmental agency for assistance programs.
Final Verdict
The Tap Score Standard PFAS Test is the right call for most homeowners — it uses the current EPA detection method, covers 30 compounds, and returns results in under a week for $89. If you’re near an airport, military base, or industrial site, step up to the Advanced panel. Testing before buying a filter tells you whether you actually have a PFAS problem to solve. Testing after installing a filter confirms it’s working. Both uses are worth the cost.
If your results come back elevated, an NSF 58-certified reverse osmosis system at your drinking tap is the most well-documented solution for removing PFAS from drinking water. A whole house filter certified for PFAS extends that protection to the rest of the house.