Product Reviews: Whole Home ➜ Water ➜ Test Kits

Tap Water Testing

Dr. Meg Christensen is the founder of Interior Medicine, a physician-created resource on non-toxic home products and household exposures. Her layer-by-layer analysis of materials and products draws on her background in medicine, biochemistry, epidemiology, and clinical research.

Updated October 2025

Box labeled 'tap score Water Testing Kit' with a yellow droplet shape background.

MyTapScore

Consistently rated the best overall tap water test company for how comprehensive and easy to use they are, MyTapScore offers tap water tests for anything you need— you can check for heavy metals, pesticides, Volatile Organic Compounds (VOCs), water disinfection byproducts, yeast, fungus, PFAS, and so much more. Highly recommended if you’re going to buy a water filter, so you know what you need to filter out, and for basic safety measures like lead and bacteria.

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FYI ➜ “Non-toxic” doesn’t have a definition, and I use the words chemical-free,toxin, and toxic on Interior Medicine inaccurately. I do this for practical purposes, for now: they’re accessible terms that allow people to find what they’re looking for, and they’re shorthand for a complicated problem. I made an entire (free!) course about this. Check it out here.