Water Supply Information

Western's Water Quality Reports Western Municipal Water District is pleased to provide you with annual drinking water quality reports as required by the federal Safe Drinking Water Act. These comprehensive reports contain important information about your drinking water. Also please see our Drinking Water Factsheet.

Industrial and commercial users, including hospitals,medical centers and health clinics, please forward the water quality report to your Environmental Compliance Manager.

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Este informe contiene información muy importante sobre su agua potable. Tradúzcalo o hable con alguien que lo entienda bien. Si desea más información, por favor contacte a Matt Buck en Western Municipal Water District, 951.571.7285 or en mbuck@wmwd.

Water Fluoridation
In November 2007, the Metropolitan Water District of Southern California, which provides water to Western that in turn delivers water to your home or business, began adding fluoride to its treated water supply. This was done based on recommendations from the California Dept. of Public Health, the U.S. Centers of Control and Prevention, and the American Dental Association. Metropolitan now joins more than 14,000 communities across the nation that have fluoridated water supplies.


Attention Fish Owners Be sure to check with your local hobby fish dealer for the proper water treatment product before adding water to your pond or aquarium.

Water Safety
The safety of our water supply is one of the District’s primary concerns. Western has heightened the security of our water operations systems and continues to be proactive in our efforts for delivery of a safe and secure water supply.

Radiation Monitoring of Drinking Water Supplies Our main water supplier Metropolitan continues to monitor developments of the nuclear emergency in northern Japan following the March 18, earthquake and tsunami. The U.S. Environmental Protection Agency (EPA) has measured and reported on radiation levels throughout the United States as part of an on-going radiation monitoring network (RadNet). Because measured radiation levels in air remain at background levels, the California Department of Public Health (CDPH) is not recommending supplemental drinking water monitoring. Furthermore, the Nuclear Regulatory Commission (NRC), EPA, and the Los Angeles County Department of Public Health have all stated there is no risk expected to California as a result of the situation in Japan.Metropolitan conducts compliance monitoring for radiation in its raw and treated water supplies every three years. The most recent monitoring conducted prior to the nuclear emergency was in February 2011. Low levels of radiation are typically detected which are consistent with the geology of the watershed and past human activities such as atmospheric nuclear weapons testing. Metropolitan subsequently conducted additional voluntary sampling at 13 locations in April. These samples confirmed that radiation did not increase above historical background levels. Metropolitan will continue to follow any sampling recommendations issued by EPA or CDPH. Additional information on this event, including national air and water monitoring data, can be found at the EPA RadNet web site at: www.epa.gov/radiation/.