How to Test Your Tap Water: Mail-In Labs, Strips, and What to Order

Test strips are not enough for lead or PFAS. Here is how to pick a certified lab panel, avoid contamination, and read the results.

By J. Letorney · Water treatment specialist · 40+ years in the field

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If you drink from a public water system, your CCR is the baseline. If you want to know what is at your faucet — especially for lead — you need sampling that matches the question.

What strips and TDS meters miss

TDS meters measure conductivity — not specific contaminants. Strips can hint at pH and some ions but are not reliable for lead, PFAS, arsenic, or bacteria.

Mail-in lab panels

Choose a lab accredited for drinking water methods. Common add-ons: lead (first-draw vs. flushed), copper, bacteria, nitrate (wells), arsenic, PFAS (EPA methods 533/537.1).

Sampling tips

For lead, follow the kit instructions exactly — “first draw after 6+ hours without use” is different from a flushed sample. For bacteria, use sterile bottles and timing as directed.

Compare to EPA limits: Your report should list results alongside MCLs or health advisories. If you are unsure, ask the lab for a plain-language summary.

TOP PICK

⚠ Certified labs beat gimmick “TDS” meters for safety questions

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MORE GUIDES

Is PFAS in My Tap Water? What the EPA Data Actually Shows→Best Water Filters for Lead Removal in 2026 (NSF Certified)→What Does an EPA Water Violation Actually Mean for Your Health?→How to Read Your Consumer Confidence Report (CCR)→Chloramine vs. Chlorine in Tap Water: What It Means for Filters→Private Well Water Testing 101: What to Order and How Often→Disinfection Byproducts (TTHM & HAA5): What They Are and How to Reduce Them→Hard Water Explained: Scale, Softeners, and What It Means for Your Taps→Bottled Water vs. Tap Water: Cost, Safety, and PFAS Reality→Chromium-6 in Drinking Water: Should You Worry?→Nitrate in Well Water: Why Infants and Pregnancy Need Extra Care→Refrigerator Water Filters: What They Actually Remove→Whole-House Water Filter vs. Under-Sink: Which Should You Choose?→Boil Water Advisory: What to Do, What to Avoid, and How Long It Lasts→Microplastics in Drinking Water: What We Know (and What We Don’t)→Arsenic in Well Water: The EPA Limit and Treatment That Actually Works→Why Distilled Water and Reverse Osmosis Are the Two Best Systems for High Purity→

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