Hi, I'm Shashank — ex-Apple & ex-Kohler engineer

The water in your home, explained by an engineer.

I read the spec sheets, pressure-test the claims, and translate the labels — so you pick the right filter for your house the first time.

Get my free report →

Shashank Varma — founder of Mr Water Geek

From the founder

I'm an engineer — 9 years building water filters at Kohler and hardware at Apple. Choosing how to treat your water is far more confusing than it should be: incomplete options, misleading marketing, and most of these products aren't even designed with your health in mind. I started Mr Water Geek to make it simple and help you pick the right one.

— Shashank Varma, founder

Where we stand

Trusted since: 2019
In-depth guides: 400+; written by an engineer, not an affiliate farm
Topics covered: 5; Filters & Guides, Water Science, Safety and Regulation, Hydration and Wellness
Our promise: Reader-funded
Every affiliate link disclosed

Know your water

Free Water Quality Report

What’s in your tap water?

Every public water utility in the U.S. is required to test your tap water and report what it finds. But those reports are buried, full of jargon, and easy to misread. Your water can meet legal limits and still contain things one should filter — like lead from old pipes, PFAS “forever chemicals,” or disinfection byproducts.

Enter your ZIP below. I’ll pull your utility’s latest results, flag anything above health guidelines, and email you a plain-English breakdown of what to filter — free.