Under-sink water filtration system with a glass of clear water and old plumbing fittings on a kitchen counter.

Lead in Drinking Water: Where It Comes From and How to Remove It

Lead is a toxic metal with no safe level of exposure, and it rarely comes from your source water. It leaches from lead service lines, old solder, and brass fixtures between the water main and your tap, which is why two houses on the same street can get very different results.