San Jose Water Company provides water from three major sources.
Surface water comes from lakes and rivers while groundwater is pumped from wells. Wells extract water from underground layers of sand, gravel or porous rock called aquifers.
Groundwater generally has a higher mineral content than surface water but requires less treatment. To control bacteria, all surface water is filtered and disinfected with chlorine and/or chloramines at modern water treatment plants before it is distributed to customers. Groundwater pumped from our deep wells is largely free of bacteria. The wells require disinfection primarily to prevent the growth of bacteria in the pipes and tanks of our water distribution system. Both groundwater and surface water sources are of excellent quality and are regularly tested to insure compliance with safe drinking water standards.
The San Jose Water Company Service Area and Water Supply Sources map indicates only the predominant source of water in your area. Because these sources are often blended together in the distribution system, you may receive different sources from day to day as customer usage changes. If you need more specific information about your source of supply, please call us at 279-7900.