This area is dominated by a blend of water produced from the Santa Cruz and Avra Valley wellfields. Because water from the Santa Cruz wells is harder, customers notice variations in the blend. 12 - Airport A blend of water from the Santa Cruz and Avra Valley wellfields typically comprise the water in this area. During summer, when about one-third of the Avra Valley water is boosted to the Clearwell Reservoir, the quality is dominated by the Santa Cruz wellfield. As in Area 12, the water is a varying blend of Avra Valley and Santa Cruz wellfield production.
Quality varies accordingly.
Monthan Davis Monthan Air Force Base maintains its own system of groundwater wells and distribution piping. The wells at DM might be similar in quality to Tucson Water's zone C wells. A small percentage of Tucson Water customers is served by isolated systems. These systems are usually located in relatively remote areas where connecting to the central system is currently impractical. Isolated areas have a local well or two and their own distribution system, but lack the flexibility of the central system to receive water from a different zone.