If you are a customer of the Las Vegas Valley Water District, or the City of Henderson Department of Utility Services, you may receive a letter or phone call if abnormal water usage is detected. Another type of water leak notification is sent by automated phone call or text message. Many homes in the Las Vegas area have advanced water leak detection metering technology that detects when there is continued water usage. So, if your meter detects the continuous flow of water for more than three days, it often indicates a water leak and triggers a notification.