top of page



The Green Valley Mutual Water Company receives its water from two sources…local ground water and imported State surface water sold to us from the Crestline - Lake Arrowhead Water Agency. (CLAWA) CLAWA distributes water from the State water project and pumps the water to us from Lake Silverwood. A Large amount of water from CLAWA was purchased in 2007 from the fires.

Green Valley Mutual Water Company owns, operates and maintains over 25 wells in and around Green Valley Lake. The wells are commonly grouped into well fields for composite sampling. They are; Tank Farm, Park, Stable, Meadow, Ski Hill, Angeles High Springs and Snow Canyon well systems.


In essence there are 3 separate water systems or pressure zones in Green Valley Lake. Water is pumped and transferred between these zones to maintain an adequate supply for all. The wells feed directly into the distribution system and back feed to fill the tanks. On an average we produce and distribute about 27 million gallons of water per year. Our total storage capacity is 1.7 million gallons held in storage tanks.


The Green Valley Mutual Water Company (GVMWC) regularly monitors water quality to ensure high quality and compliance with the stringent requirements of the California Department of Health Services (CDHS) and the Federal Environmental Protection Agency (EPA). In California, drinking water standards also called MCLs, are established in two categories: primary and secondary standards. Primary standards relate to public health and secondary standards relate to aesthetic standards such as taste, odor and color.

Recent changes in the California law (Health and Safety Code Section 116470) require that we provide additional water quality information. The additional information includes public health goals (PHG) or maximum contaminant level goals (MCLG). Definitions of these terms are found in this report along with a listing of the PHGs or MCLGs for each detected chemical.


Samples are taken from our distribution system weekly to monitor bacteriological water quality. Well samples are tested monthly for bacteria and the physical qualities of the water such as clarity, taste, odor and color.  In compliance with the State and EPA regulations we test for the following contaminants:

• Microbiological contaminants, such as viruses and bacteria, which may come from the sewage system, septic systems, livestock operations and wildlife.

• Inorganic contaminants, such as salts and metals, which can be naturally-occurring or result from urban storm runoff, wastewater discharges, oil and gas production, mining and farming.

• Pesticides and herbicides, which may come from a variety of sources such as agriculture and residential uses.

• Radioactive contaminants, which are naturally occurring.

• Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by –products of industrial processes and petroleum production, and can also come from storm water runoff, gas stations and septic systems.


The water quality data found in this report represents the test results for the constituents detected but does not indicate all that we test for. For example, we test for over 60 organic constituents but none were detected.

Water Quality or water system information is always available to you at our Green Valley Mutual Water Company office. If you should have any questions please contact the office at (909) 867- 2912 during regular business hours.


All drinking water, including store purchased bottled water may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that the water poses a health risk. More information about contaminants and potential health risks can be obtained by calling the EPA’s safe drinking water hotline at (1-800-426-4791)


Some people may be more vulnerable to contaminants in drinking water than the general population. Persons with immune system disorders, cancer patients undergoing chemotherapy, patients with HIV/AIDS, organ transplant recipients, some elderly and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. Other information can be obtained from the EPA/Center for Disease Control (CDC) and the Safe Drinking Water Hotline.

bottom of page