The Helix Water District
The Helix Water District covers an area of nearly 50 square miles, serving the cities of La Mesa, El Cajon, Lemon Grove, the community of Spring Valley, and various unincorporated areas near El Cajon. Helix Water District owns Lake Jennings and Lake Cuyamaca. Helix Water District customers receive water treated at a 106 MGD R. M. Levy Treatment Plant in Lakeside. Helix also has storage rights of 10,000 acre feet in El Capitan Reservoir for water from Lake Cuyamaca, San Diego River tributaries, and imported water. Treated water is stored in the 30-million-gallon Grossmont Reservoir, under the grass at Harry Griffen Park, and 21 other storage tanks located throughout the District. The District has a total storage capacity of 63 million gallons for filtered water.