Should you have any questions or concerns, please call us. About 98 percent of the potable water in the Lewiston system comes from the Clearwater River. It is then treated in a conventional water treatment plant. This consists of clarifying the raw or river water by adding chemicals that coagulate the impurities and then these are settled in a basin. Finally, the water is passed through a mixed media filter.
Chlorine is added for disinfection and to maintain a residual in the distribution system.
The remainder of our water comes from wells. Lewiston has six wells. Three are used primarily for irrigation of parks, the cemetery, and a golf course. Two are utilized for domestic needs and one remains in a standby mode for domestic and fire usage. This may peak in the summer months to about 9.5-10.0 mgd.