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Why was the JWPP originally designed to use reverse osmosis treatment and advanced oxidation processing (AOP)?

Staff and elected officials from both Cottonwood and ACWWA worked with their consultants to select the best water treatment for the source water. They toured water treatment plants with similar source water, formed a committee of national experts to provide advice in design, and worked with the Colorado Department of Public Health and Environment (CDPHE) through the permitting process to select the most appropriate treatment technology.