The Tehachapi-Cummings County Water District is located in the Tehachapi Mountains, east of the southern San Joaquin Valley, and encompasses approximately 266,000 acres. TCCWD provides an imported water supply, water resource management, and flood protection. The District is governed by a five-person Board.

TCCWD manages three groundwater basins within its boundaries: the Tehachapi, Cummings, and Brite basins. The basins were adjudicated through court actions over the period 1966 to 1973. Safe yield for the three basins totals about 10,000 acre-feet annually.