There are many problematic issues in the lawsuit that we cannot address here, but below are some brief highlights
Berkey Filters Must Face Pesticide Registration, Judge Says
British Berkefeld Water Filter Systems - NCF Certified Water Filters
What's going on with Berkey? : r/preppers
Brita Water Filter Class Action Lawsuit
The EPA has just banned Berkey water filters.
Press Release: Berkey Water Filters Sues The EPA - Berkey Water Systems
Berkey® Water Purifier - USA Berkey Filters
Berkey SPTREP Replacement Filter for GSPRT Sports Bottle : Sports & Outdoors
Buyer Beware - Examples of Counterfeit Black Berkey Filters
Berkey Sued: Class action lawsuit against water filter company