Is the Berkey water filter system a scam?

Berkley water filters claim to remove over 99 percent of lead, chlorine and viruses. Lab test results on the Berkley website and independent websites prove Berkley filters outperform other water filters on the market. Amazon customers give the system a rating of 4.3 stars out of 5, as of 2015.

Berkley water filters are the only product of its kind to remove viruses, according to the company website. Reviewers on Amazon consider this to be an advantage. Other positive reviews highlight the filter's ability to remove fluoride, its ease to clean and maintain, and its long lifespan. Negative reviews include poor design, issues with leaking and difficulties receiving replacement parts.