Water quality recommendations on this page are informational. Test results vary by location. Contact your state health department or a certified lab for guidance specific to your water supply.
WATER TESTING
Best Home Water Test Kits (2026): Lab and DIY Compared
Not all water test kits work the same way. Some go to a certified lab and catch PFAS. Others are strips you read in your kitchen. Here is how they stack up.
Last reviewed: May 2026
Lab vs DIY tests: the key difference
A certified lab test sends your water sample to a real laboratory. Analysts use instruments your home cannot replicate. Results are certified under state or federal programs. You can use them for real estate transactions, insurance claims, or legal cases.
A DIY strip test stays in your home. You dip a strip in water and compare the color to a chart. It takes minutes. It is useful for quick checks on bacteria or chlorine. But it cannot detect PFAS, and the results carry no legal weight.
For well water, always use a certified lab at least once a year for bacteria and nitrates. Add PFAS testing every three years or when a contamination event happens near you.
Kits compared
| Kit | Price | Turnaround | PFAS? | Certified lab? |
|---|---|---|---|---|
| SimpleLab Tap Score Advanced Best overall | $189 | 7 to 14 days | No (upgrade to PFAS+Plus) | |
| SimpleLab Tap Score PFAS+Plus Best for PFAS | $299 | 7 to 14 days | Yes, 32 PFAS compounds | |
| WaterCheck (National Testing Labs) Solid budget lab option | $100 to $250 | 10 to 14 days | Add-on option | |
| Watersafe Well Water Test Basic screen only | $30 | Minutes (DIY strips) | No | |
| Health Metric Well Water Test Entry-level screen | $20 to $40 | Minutes (DIY strips) | No |
PFAS-specific testing
If PFAS is your concern, you need a kit designed for it. Standard water panels test for bacteria, metals, and basic chemicals. PFAS requires different lab equipment, typically using EPA Method 533 or 537.1.
SimpleLab Tap Score PFAS+Plus ($299) tests 32 PFAS compounds. This covers the six compounds the EPA now regulates plus 26 others that may be present near industrial sites, airports, or military bases.
If cost is a barrier, check your state health department first. Michigan, Vermont, New Jersey, and several other states offer free or subsidized PFAS testing for private wells.
How to use a mail-in test kit
- 1.Order online. Your sterile collection kit arrives in 2 to 3 business days.
- 2.Follow the collection instructions exactly. Flush the tap for 2 minutes first. Do not touch the inside of the bottle or lid.
- 3.Refrigerate the sample. Use the prepaid shipping label and mail within 24 hours.
- 4.Results arrive via email or online dashboard. For SimpleLab, you see each contaminant compared to the EPA limit and the EWG health guideline.
Frequently asked questions
What is the best water test kit for well water?
SimpleLab Tap Score Advanced ($189) is the best overall for well owners. It tests 100+ contaminants, uses EPA-certified labs, and produces a clear online report. If you specifically need PFAS data, step up to Tap Score PFAS+Plus ($299).
Can I test for PFAS at home with a kit?
Not with a strip test. PFAS molecules require laboratory equipment to detect. You need a certified mail-in test like SimpleLab Tap Score PFAS+Plus or a state-certified local lab. Expect 7 to 14 days for results.
What is the difference between a lab test and a DIY strip test?
Lab tests send your sample to a certified facility where analysts use precise instruments. Results are legally certified. DIY strip tests give a rough screen in minutes using color-change chemistry. They are good for quick checks but cannot detect PFAS, arsenic, or many other contaminants.
How often should I use a water test kit?
Test for bacteria and nitrates with a certified lab every year. Run a comprehensive lab test every 3 to 5 years. Use a DIY strip between annual tests if you notice changes in taste, smell, or color.