Foothill Farms Water Hardness & Quality Report (2026)

The Foothill Estates System is operated by California Water Service (Cal Water) serving the Foothill Farms area in Sacramento County, California. Water is sourced entirely from two local groundwater wells — no surface water reservoirs or rivers are involved. Distribution occurs through a system of five storage tanks, with treatment focused on disinfection and corrosion control rather than softening. In 2024, Cal Water conducted 635 tests on 108 samples for 94 constituents, confirming compliance with all primary and secondary federal and state drinking water standards.

The supply originates in the Sacramento Valley portion of the Central Valley groundwater basin, a vast alluvial aquifer recharged by Sierra Nevada snowmelt and local precipitation infiltrating through permeable Quaternary sediments. Geologically, the area overlies thick layers of Holocene and Pleistocene sands, gravels, and silts derived from granitic and metavolcanic source rocks, interspersed with carbonate-rich zones. As water percolates through these mineralized formations, it dissolves calcium and magnesium from carbonate and bicarbonate compounds, producing a hard supply typical of foothill-adjacent basins.

Hard water at this level causes scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency — expect 20–30% higher energy use in heaters and frequent descaling requirements. Soap lathering is poor, leaving films on dishes, skin, and laundry. A water softener is recommended, with annual salt refills and resin cleaning. The supply meets all standards; arsenic averaged 6.9 ppb (below the 10 ppb MCL), lead and copper compliance is confirmed via tap sampling, and no PFAS were reported in the 2024 CCR. Treatment includes chlorination, fluoride adjustment, and corrosion inhibitors.