Do your sprinklers hit the driveway and sidewalk instead of the grass? Make sure your sprinklers are in proper alignment and aimed in the right direction, so the spray hits plants or soil – not concrete. According to the U.S. Environmental Protection Agency, as much as 50 percent of outdoor home irrigation water is wasted, often through faulty or misdirected sprinklers. The EPA recommends checking your sprinklers at least once a month for leaks, broken heads, misdirected spray and other issues. Those little leaks add up quickly, says the EPA. One tiny hole the size of the tip of a ballpoint pen in a sprinkler pipe or the base of a head can waste 6,300 gallons a month.