EWG's Updated Water Filter Buying Guide
Find the right filter for your water – and budget
What’s most important to you in a water filter?
Whether you want the least expensive or most effective filter, a filter to soften hard water or one to remove specific contaminants, you can find options below.
Use a carbon filter to reduce contaminants at low cost. There are many types to choose from, but effectiveness varies widely.
Reverse Osmosis Systems
For the most effective filtering, use a reverse osmosis system combined with a superior carbon filter. Note: Many brands use minimally effective carbon filters.
Use a whole-house water softener with an ion exchange filter to soften your water.
Use the search function to find filters certified to reduce particular contaminants. Not all technologies are equally effective.
Find the filter that works best for you:
Select a type of filter, filter technology or contaminant below.