Federal regulations require chlorine treatment of the water supplied to urban and suburban areas of America and much of Canada from surface sources such as lakes, reservoirs and rivers, constituting about 75 percent of water consumed. Water from underground sources generally is not chlorinated unless it is supplemented by surface water. My hometown, Lacey, Washington, and some surrounding communities that are supplied water by Lacey, are fortunate to be among that group; I'd like to see that continue.

Chlorination is inferior water treatment on at least two counts. (1) Although it has greatly lowered infectious waterbome diseases in the U.S.A. and Canada, chlorination fails against a variety of water problems including parasites and can seriously harm people who use the water. (2) Its cost is unnecessarily high. As of 1996, Andover, Massachusetts' new ozone treatment costs $83 per million gallons of purified water, only two-thirds as much as the old treatment process. The town saves $64,000 annually in chemicals costs alone, and uses less electricity.