U.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 ...

For the cautious -- or simply curious -- homeowner, an at-home water testing kit may seem reassuring. But there are high levels of variability between test kits' abilities to detect potential ...