About our Water

LHMWD water comes from a variety of natural sources. Our natural sources include precipitation, surface stream flows and regional groundwater (aquifers). LHMWD also purchases water from Metropolitan Water District of Southern California. This agency imports water from Northern California and the Colorado River. Water delivered to homes and businesses is a blend of well water (25 percent) and import water (70 percent).

Water recycling which produces highly treated wastewater is used to irrigate some golf courses and large landscaped areas. Thirsty Southern California is using more and more recycled water for irrigation in order to save its precious well water and import water for drinking and household use. The LHMWD managed groundwater basins are estimated to hold over 2 million acre-feet of water. The annual safe yield of these basins is approximately 30,000 acre-feet per year, which meets nearly half of the District's needs. Most of the remaining water demands are met with imported water purchased from Metropolitan Water District of Southern California.

LHMWD is also continuing to develop more use of reclaimed water for irrigation purposes. Surface water from Vail Lake is used to help replenish our groundwater supplies through recharge operations. Aquifers All aquifers managed by the District are located in the Santa Margarita Watershed. Oversight of all groundwater production within the Santa Margarita Watershed falls under the continuing jurisdiction of the United States District Court, San Diego and is administered under the auspices of a court appointed watermaster (the "Santa Margarita Watermaster"). An acre-foot equals about 326,000 gallons, or enough water to cover an acre of land about the size of a football field, one foot deep. An average California household uses between one-half and one acre-foot of water per year for indoor and outdoor use. Much of California's water is stored as snow in the Sierra Nevada mountains.The LHMWD Consumer Confidence Report is published annually. It typically provides information about where your water comes from, what it contains and other general public consumer information.

Use the link on the left to view the Consumer Confidence Reports. They are provided as downloadable PDF files and clicking on the link should automatically open the appropriate file in Adobe Acrobat Reader.

If you have any particular questions about this information call (951) 296.6900.
Consumer Confidence Reports