Twin Falls City Code requires all irrigation systems, which are connected to the City's potable water systems and are not connected to pressurized irrigation, to have backflow prevention devices. As with all other cities in the United States, the City of Twin Falls is required to ensure that homeowners have backflow devices connected and tested on a regular basis.
Backflow prevention devices prevent harmful substances - such as fertilizers, animal waste, and other substances - from entering the City's drinking water system. If the contaminants enter the drinking water supply, it could harm the homeowner as well as other homeowners connected to City drinking water.
All homeowners should check to see if their homes requires a backflow prevention device, and - if needed - have one installed and tested regularly.