Environment
Do you really need a water filter? Here’s what experts say
7 minute read Wednesday, Mar. 11, 2026U.S. tap water is generally safe and high quality. But that doesn’t mean every glass tastes the same, or that every building’s plumbing delivers identical water to the faucet.
That uncertainty has fueled a booming market for water filters, from simple pitcher models to multi-thousand-dollar reverse osmosis systems. Yet experts say most American households don’t need extensive treatment. The challenge is knowing how to decide whether you need a filter.
Under the Safe Drinking Water Act, the Environmental Protection Agency sets health standards for more than 90 contaminants in public water systems, including chemicals and microbes. Utilities treat water with disinfectants like chlorine to kill harmful germs before it reaches homes. Most public utilities meet those standards and most Americans can safely drink from the tap.
“Unless you’re experiencing health impacts, you’ve got a notice from your water system or there’s a credible media story saying your water is unsafe, you shouldn’t feel the need to get a filter,” said Gregory Pierce, director of the University of California Los Angeles’ Human Right to Water Solutions Lab. “You’re still welcome to because it might make your water taste a little bit better, but it shouldn’t be considered necessary to have a water filter in 90-plus percent of the United States.”
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