Certified lab vs mail-in kit vs dip strip
You need a number you can trust for lead, PFAS, or bacteria — not a color square on a stick. A state-certified lab analyzes a sample under a certification program; a dip strip is a screening hint at best.
Mail-in kits sold online are only as good as the lab behind them. If the kit goes to a certified lab for the analyte you care about, you are buying logistics. If it is only a strip or a consumer meter, you are not getting a certified result.
Three different products
- Dip strip / pad: Cheap, fast, and not a substitute for lead, PFAS, or compliance work.
- Mail-in kit: You collect (or someone does), then ship bottles to a lab. Ask which lab and which state certification.
- Certified laboratory: Appears on an official state list for the test. That is the lane for decisions that matter.
When a strip is still useful
Strips can flag an obvious chlorine or hardness swing before you spend on a panel. They do not settle a real estate contingency, a private-well health question about lead, or a PFAS concern.
Start with official contacts via the EPA certified laboratory contacts. County health or Cooperative Extension may also test wells cheap or free.