Backflow occurs when a loss in water pressure (commonly due to a fire hydrant being opened, a water main break, or abnormally high water usage) causes the water in your pipes to flow in the opposite direction. This could allow contaminated or polluted water to travel back into the drinking water supply, possibly contaminating thousands of people.

A backflow prevention assembly is a testable mechanical device which uses valves, in different configurations, to prevent contaminated water or chemicals from flowing back into the public drinking water supply system.

Cross connections can occur at both commercial and residential properties. For commercial customers, cross connections exist in many forms, from carbonated beverage machines and ice makers, to fire sprinkler systems and x-ray machines.

On the residential side, the most common cross connections occur with lawn irrigation and fire sprinkler systems.

Yes. Lawn irrigation systems are considered a hazardous cross connection. All particulates that are in your lawn can seep into the underground pipes and enter the drinking water supply. This can be anything from fertilizers to animal feces. Properly working backflow prevention devices protect this from happening.

If you decide to no longer use your sprinkler system, you may cut and cap the pipe inside your home that leads to your sprinkler system. Once this is complete, the Water Department will need to be notified so they can inspect it.

Please note: If you have any questions or concerns, call the Public Works Department at 815-215-4800.