Since 2012, nearly 2,000 water systems across the U.S. have found elevated lead levels in tap water samples, a public health concern that requires them to notify customers and take action. Search or click the map to find systems in your area. The map table shows the state/name of the water system; the county it serves; the range of lead levels over 15 parts per billion in samples that triggered an action status, and total action-level tests over the period.