A man in a lab coat and wearing gloves adds a substance into a vial
Chemist Alan Frey adds an isotope dilution standard to a water sample March 19, 2024, at the Klein Water Treatment Facility in Commerce City. The facility tests samples for emerging contaminants and VOCs biweekly. The South Adams County lab is one of few surrounding municipalities that runs its own water samples. (Olivia Sun, The Colorado Sun via Report for America)