It’s easy to feel like you’re doing the right thing when you buy a water filter—especially a cheaper one that promises the same results as big-name brands. After all, clean drinking water is one of the most basic ways families protect their health. But a growing number of experts are warning about a hidden danger: counterfeit or low-quality filters that don’t actually filter anything. In some cases, these products may even make your water worse. Here’s what’s really happening—and how to protect your household.
