 Lou Manfredini here with a HowSmartz Minute Home Improvement Tip. Millions of dollars are being spent on water purifiers for U.S. homes, and they do work. But there is a step you can take to increase the water quality in your home, and it doesn't cost a thing. Turn the faucet on and let it run for a good 30 seconds before you place a glass underneath it. You can decrease the lead content, especially in older homes, by up to 50%.