 Delivering a reliable supply of high quality drinking water and providing excellence in customer service are Monte Vista Water District's most important priorities.
Monte Vista Water District's water supply is obtained from two sources: Groundwater and Imported Water
comes from underground water-bearing soil called an aquifer. This water originates from precipitation and irrigation systems. Over several years, water from these sources will percolate through the soil and reach the groundwater table. Wells pump water from deep in the ground, between 905 to 1,326 feet. The ground acts as a large filter, so that only chlorination is normally required to produce safe drinking water at the wellhead site. Approximately 81 percent of the District's water is obtained from 10 active wells at various locations within the District's boundaries.
Approximately 19 percent of Monte Vista Water District's supply is imported from Northern California. It travels through the State Water Project's California Aqueduct that empties into Lake Silverwood. From there it travels into the Rialto Feeder, a large pipeline that runs along the foothills, delivering water to area treatment plants. Monte Vista Water District's treatment plant is the Water Facilities Authority (WFA), a facility that is co-owned by the cities of Upland, Ontario, Chino, Chino Hills and Monte Vista Water District. The water distributed by Monte Vista Water District that our customers receive at their taps meets or exceeds all state and federal drinking water standards set to protect public health.
The Federal Safe Drinking Act of 1974 and its 1986 amendments are intended to ensure the quality of our nation's water supplies. In order to ensure that tap water is safe to drink, the U.S. Environmental Protection Agency (USEPA) and the California State Department of Health Services (DHS) set forth regulations that limit the amount of certain contaminants in water provided by public water systems. DHS regulations also establish limits for contaminants in bottled water that provide the same protection for public health.
The District carries out the required testing for over 80 constituents that may be found in drinking water supplies. To ensure proper disinfection, chlorine is added to the water supply while it is in a reservoir or in the distribution system, in the form of sodium hypochlorite, a chemical similar to household bleach. The chlorine kills harmful bacteria and viruses that might enter the system.
Click here to view Monte Vista Water District's Water Quality Report, published on July 1 of every year.
If you have any questions or comments about the quality of your drinking water, contact the Water System Operations Department at (909) 624-0035, Ext. 122 or send an e-mail.
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