Lakewood Water Hardness & Quality Report (2026)

The City of Lakewood Water Utility serves approximately 160,000 residents across Lakewood in Jefferson County, Colorado, part of the Denver metropolitan area. Water sources include surface water from the South Platte River watershed, reservoirs such as Bear Creek and Foxton, and groundwater from the Arapahoe and Laramie-Fox Hills aquifers. Treatment occurs at facilities including the Crittenden and Lamme Valley plants, employing filtration, disinfection, and fluoridation. The supply is blended seasonally from mountain and alluvial sources for consistent quality meeting EPA standards.

The supply originates from the Upper South Platte River Basin and adjacent foothills watersheds, where water contacts Pierre Shale, Dawson Arkose, and Denver Formation sediments from Cretaceous and Tertiary periods. Groundwater is drawn from confined aquifers in the Denver Basin, overlying mineral-rich strata. This geology imparts a moderately mineralized character, with natural dissolution of alkaline earth metals from sedimentary formations shaping a moderately hard profile common to blended mountain snowmelt and foothill alluvial sources.

Moderately hard water in Lakewood leads to noticeable scale buildup on showerheads, faucets, and inside pipes over 3–5 years, reducing water pressure and efficiency. Water heaters, dishwashers, and washing machines face potential efficiency losses and accelerated wear. Regular descaling of aerators, vinegar soaks for fixtures, and carbon filters for taste improvement help; a water softener is recommended for households experiencing soap scum, dry skin, or higher detergent use to protect appliances and plumbing. The utility meets all EPA primary standards with no recent violations; disinfection byproducts such as TTHMs are monitored and remain under MCLs.