Water systems depend on pressure to keep water flowing in the proper direction. However, backflow can occur when there is a significant drop in the water pressure on the water district’s side. When this happens, it is possible for polluted water from the customer’s plumbing system to reverse flow into the public water system. If the water in the customer’s system has come in contact with harmful substances and it backflows into the public drinking water system, it could cause illness, or in extreme case, death.
