Water for Zone 1 is supplied by the high service pumps at the Water Treatment Facility.
These high service pumps convey water to the various distribution and transmission pipe lines and provide water to the ground storage reservoir at Calvary Hill and three elevated storage tanks known as West, South and Southeast.
Zone 1 is the largest pressure zone in the City and has a service area of approximately 22 square miles.
Ground elevations in zone 1 range from 960 to 1,090 feet.
The current hydraulic gradient for zone 1 is 1,184 feet as dictated by the maximum water surface elevations in the zone 1 ground storage reservoir at Calvary Hill and the West, South and Southeast water towers.