Rio Alto Water District (RAWD) provides domestic water and wastewater services to the community of Lake California in Cottonwood, CA. RAWD maintains approximately 25 miles of active water distribution and transmission pipes and currently serves 1,275 residences. RAWD's source of potable water is 100% groundwater. Sewer improvement District #1 was established when infrastructure was completed and is limited to approximately 1,365 lots within the approved tracts which met gravity fed specifications at the time. Within the Water District service area, but not included in the Improvement District, are approximately 760 lots in the septic areas of the development.