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2020 PFAS Water Sampling Project

The City of Arvada has found no detection of PFAS in our treated drinking water. Learn more about PFAS at

The City of Arvada has conducted voluntary testing in partnership with the Colorado Department of Public Health and Environment (CDPHE) for a group of chemicals known as per- and polyfluoroalkyl substances or PFAS. PFAS are sometimes called "forever chemicals." These chemicals are commonly found in many everyday products, including firefighting foam, manufacturing processes, household products, and other items. Too much exposure may result in negative health effects.

Our water sample results received on June 22, 2020 each of the reservoirs showed very low levels of total PFAS, 4.5 ppt for Arvada Reservoir and 0.77 ppt for Ralston Reservoir. The treated drinking water at Ralston Treatment Plant showed no detection for all 18 PFAS tested.This is below EPA’s health advisory level of 70 parts per trillion which means health impacts are not expected to occur. All of our PFAS test results are available at: