How to Test Your Tap Water (and What the Results Mean)

Testing your tap water means collecting a sample and sending it to a laboratory certified for drinking water analysis. Home strips give you a rough read on a handful of parameters in minutes; a certified lab gives you numbers you can act on. The EPA’s position is unambiguous: use a laboratory certified to do drinking water testing. Key Takeaways — How should you test your water? Start with your utility’s annual report, because it’s free and it tells you what’s in the water leaving the plant. Then test your own tap, because the report can’t see your plumbing. Use a certified lab for anything you plan to make a decision on — strips are fine for curiosity and useless as evidence. And check with your local health department first; plenty of them test private wells at no cost. STEP ONE IS FREE Read the report before you buy a test Your utility already publishes what it detected. Pull yours by ZIP in about 30 seconds. Check my ZIP → Why Your Utility’s Report Isn’t a Test of Your Water Every community water system publishes an annual water quality report, and it’s the right starting point. It names what was detected, at what levels, and whether the system had violations. It costs nothing ...