Start with official monitoring + targeted testing
Check your utility CCR, state PFAS pages, and EPA data first. If the data is old, absent, or not tap-specific, order PFAS-specific testing.
Last reviewed: 2026-06-29
What to buy — and what not to buy
What to buy first
A PFAS-specific lab-backed test that reports at least PFOA and PFOS, and preferably a broader PFAS panel when the local source is uncertain.
Compare PFAS water testsWhat to buy after results
If PFAS is documented, compare under-sink RO or other treatment by exact PFAS-reduction claims, certifications, independent test data, maintenance, and cost.
Compare PFAS filter categoriesWhat not to buy first
Do not treat a generic pitcher, fridge filter, or “clean water” claim as PFAS protection unless the exact model documents PFAS reduction.
See pitcher caveatsBest PFAS water test options by situation
Use a PFAS panel plus well basics
Private wells are not monitored like public systems. If PFAS is a concern, pair PFAS testing with well basics such as bacteria, nitrate, TDS, pH, and local geology risks.
Route to filter comparison
If your test or official data already shows PFAS, the next decision is treatment category: usually under-sink RO or other PFAS-documented systems for drinking/cooking water.
What should a PFAS test include?
| PFAS / metric | Why it matters | Practical note |
|---|---|---|
| PFOA and PFOS | EPA’s final national drinking-water regulation set enforceable limits for these compounds. | At minimum, a serious PFAS test should report these individually. |
| PFHxS, PFNA, HFPO-DA / GenX, PFBS | Often included in broader PFAS regulatory and monitoring discussions. | Useful when local sources are uncertain or state data shows broader PFAS presence. |
| Reporting limits | A test that cannot detect low enough levels may be less useful for drinking-water decisions. | Check units and reporting limits before buying, especially for “screening” products. |
Official sources used
- EPA — PFAS drinking-water regulation page: describes the final PFAS National Primary Drinking Water Regulation and PFOA/PFOS enforceable levels.
- EPA — Protect Your Home’s Water: private-well testing context and certified-lab guidance.
- CDC — Guidelines for Testing Well Water: private-well owner testing responsibilities and local health department context.
After a PFAS result: where to go next
PFAS detected or suspected
Compare drinking-water treatment categories with documented PFAS reduction, usually under-sink RO or certified/documented alternatives.
PFAS filter guidePFAS + lead concern
Use testing to avoid buying one system for two different problems without verifying exact claims.
PFAS + lead guideUnknown issue
If you also have taste, odor, staining, hardness, or cloudy water, run a broader test plan rather than assuming everything is PFAS.
Full test-kit guideNeed help deciding whether PFAS testing makes sense?
Send your ZIP code, water source, and concern. We’ll send a practical local context check and a test-first next-step plan. A ZIP code is a starting point, not a precise utility boundary.