About WaterCriteria

A filter can only be judged against a problem. Chlorine taste, lead, PFAS, hardness, iron and bacteria each need a different treatment, and a product label rarely tells you which contaminants are certified. WaterCriteria starts with your water report or test, then compares systems on independent certification, capacity, flow and the cost of replacement cartridges.

We cover drinking-water and well-water treatment for homes. Pool and spa water belongs to our sister site PoolTested. Our guides are general information; for a private well with a health concern, follow your local health department and a certified lab.

What you'll find here

• Reviews of specific products, with a clear verdict, who each one suits and the best way to buy it.
• Buying guides that explain the choices in plain English before you spend.
• Reader codes from brands we work with, listed on our deals page and on every relevant review.

How we make money

When you buy through our links we may earn a commission from the retailer. It costs you nothing extra, and our reader codes usually save you money. Read the affiliate disclosure for details.

Get in touch

Brands, readers and partners can reach us at [email protected].