AZ HB2117

Effective January 31, 2016, all residential ion exchange water softeners installed in Arizona must operate at maximum efficiency levels for their design.

Sale or installation of time-clock regenerated ion exchange water softeners is prohibited.

Water softeners connected to water supplies with 750 milligrams per liter or less total dissolved solids must meet specific performance standards: removing at least 4,000 grains of hardness per pound of salt and using maximum 5 gallons of water per 1,000 grains of hardness removed.

Cities, towns, and counties may adopt and enforce salinity and water efficiency standards for residential ion exchange water softeners that are more restrictive than state standards.