Golden Water Hardness & Quality Report (2026)

Golden, Colorado, in Jefferson County — the Jefferson County seat at the base of the Front Range, home of the Colorado School of Mines (one of the world's premier geology and mining engineering universities), Coors Brewery (the world's largest single-site brewery), and the starting point of the famous Lookout Mountain Drive (Buffalo Bill's grave) — receives its municipal water from the City of Golden Water Utilities, which draws from Clear Creek (the mountain stream flowing directly from the Mount Evans-Front Range corridor into the Golden area) and supplemental Denver Water deliveries.

The very soft 57 mg/L hardness and low TDS of 88.8 mg/L reflect Clear Creek's pristine Front Range crystalline watershed character. Clear Creek drains directly from the central Front Range — terrain dominated by the Precambrian Idaho Springs Formation (the ancient biotite-quartz-feldspar gneiss that forms the core of the Front Range), Proterozoic gneiss and schist, and Cretaceous granodiorite. These extremely ancient crystalline rocks contain essentially no carbonate minerals, and the rapid transit of Clear Creek snowmelt through the granitic gorge produces very soft, pure mountain water. Notably, Coors Brewery selected Golden specifically for the quality of Clear Creek water — the soft, pure Rocky Mountain water is central to the brewery's brand identity.

At 57 mg/L, Golden's water is very soft — excellent for household use. Scale forms very slowly, soap lathers richly, and appliances maintain excellent efficiency. Annual descaling is more than sufficient. The PFAS level of 2.3 ppt is excellent — among the lowest in the Colorado Front Range, reflecting Clear Creek's pristine alpine watershed character, the Colorado School of Mines area's limited direct military-industrial PFAS sources, and the relatively clean upper Clear Creek watershed.