The Roanoke County water system is comprised of 9 separate source areas. These sources include surface water from the Spring Hollow Reservoir, ground water, and purchased water. The Spring Hollow Water System supplies water to Hidden Valley, Oak Grove, Penn Forest, Hunting Hills, Castle Rock, Canterbury Park, Bridlewood, Brookwood, Hunting Hills, Woodbridge, Big Hill, Little Brushy Mountain, Cherokee Hills, Glenvar East, North Beverly Heights, Wooded Acres, Berwick Heights, Georgetown Park, Mount Vernon Heights, North Lakes, The Woodlands, Starmount, Hanging Rock subdivisions, and adjacent areas. Source water comes from the Roanoke River and is pumped into the Spring Hollow Reservoir, a 3.2 billion-gallon side stream storage reservoir. Water is withdrawn for treatment at the Spring Hollow Water Treatment Facility.
Treatment includes clarification, filtration, chlorine disinfection and fluoridation.
Treated water is stored in a 2 MG clearwell then pumped through the North and South transmission lines to the distribution system. The Carvins Cove Source is water traded with the City of Roanoke. This water comes from their Carvins Cove water filtration plant. Carvins Cove supplies water to North County areas of Boxley Hills, The Hollins Community, Ardmore, Shadwell, and adjacent areas. The Crystal Spring Source is water traded with the City of Roanoke.