What water filtration system should I use?

Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)
Some people might want to invest in a filtration system for their homes that can remove specific contaminants. There are a variety of devices -- carafes and faucet mounts, as well as countertop, under-the-sink, and whole house (point of entry) units. They can make water taste better and also remove certain impurities and contaminants.

Since the mechanism and ability to remove contaminants varies by product, no single filtration system can protect against all contaminants. Choosing a filtration or purification device will depend on what you want to remove and how much you want to invest.

The EPA provides standards but does not endorse specific devices. It suggests that consumers match the filter to the contaminants and consider personal preferences for care and cost. There are three organizations accredited by the American National Standards Institute (ANSI) that certify that water filters meet EPA standards and work the way they should: Underwriters Laboratory, NSF International, and the Water Quality Association.

This content originally appeared on

Continue Learning about Water

Tap Water vs. Bottled—What Should You Drink?
Tap Water vs. Bottled—What Should You Drink?
Glug, glug, glug. That's the sound a ginormous number of us make as we drink bottled water in our cars, at the gym and behind our desks. The sound yo...
Read More
What are the benefits of drinking water before each meal?
John Douillard, DCJohn Douillard, DC
Studies show we can lose more weight and have better digestion by drinking warm water 15-30 minutes ...
More Answers
What are on-counter water filters?
Environmental Working Group (EWG)Environmental Working Group (EWG)
On-counter water filters typically sit on the counter with a line connecting directly to the faucet....
More Answers
How Much Water a Child Should Drink
How Much Water a Child Should Drink

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.