Is What You Own Good Enough?

Certification is per filter, not per brand. That single fact explains almost every disappointment in this category: Brita sells two pitcher filters that fit the same pitcher, and only one of them is certified for lead. Buying "a Brita" does not tell you which one you got. PUR does exactly the same thing with its basic and PLUS cartridges, and its PLUS sheet now adds PFAS. Waterdrop runs the same split across a much larger catalog, where one letter in the cartridge code separates a lead certification from a taste claim, and Aquasana splits it by tier — 78 certified contaminants at the sink, a chlorine claim at the whole house. Clearly Filtered splits it a third way: a real NSF certification for chlorine, and laboratory testing for the long list people actually buy it for, which is also how Epic and Berkey are built. Culligan is the odd one out: a dealer business with a retail shelf, and the retail filters carry better paperwork than their price suggests. And iSpring splits it in the strangest way of all — the same reverse osmosis model number is listed with different certified claims depending on which factory assembled it.

So these pages answer the specific question rather than rating the brand. Does this filter remove lead? Does it remove PFAS? Does it remove fluoride? Each answer names the standard, the certification status and the date we checked it — and where the answer is no, it says which product does the job instead.

If you have not yet chosen a filter, start with the tier guide rather than a brand. The tier decides far more than the badge does.