The District includes all of Calaveras County in the Central Sierra Nevada foothills in the northeastern portion of the State. The District boundaries encompass approximately 640,000 acres of land ranging from the San Joaquin Valley to the Sierra Nevada Mountains.
San Andreas, the County seat, is approximately 100 miles east of San Francisco and 60 miles southeast of Sacramento. The city of Angels Camp is the only incorporated community in the County. The population of the County as of January 2009 is estimated by the California Department of Finance, Demographic Research Unit, to be approximately 46,000, with most of the residents living within the various unincorporated communities.
The District currently provides water service to approximately 12,500 municipal and residential / commercial customers in four improvement districts located throughout the County. The District currently provides sewer service to approximately 4,500 customers in six improvement districts located throughout the County.