As Americans, we have come to expect that our drinking water supply will be safe and reliable, and with a few notable exceptions such as the situation in Flint, Michigan, this is a reasonable expectation. Federal, state, and local governments have invested billions of dollars to ensure that water delivered to our homes and workplaces is safe to consume. However, routine systems, equipment, and activities have the potential to contaminate water supplies and water systems. By understanding and implementing cross-connection protection practices, we can help to minimize the risk of contamination to our potable water supplies.