Lakewood Water Quality
Understanding what's in your tap water in Lakewood, Colorado
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Where Lakewood's Water Comes From
Lakewood has a unique water supply situation among Front Range cities: it is served by two separate water providers. The majority of Lakewood receives water from Denver Water, the region's largest utility. However, the northwest portion of the city is served by the Consolidated Mutual Water Company (CMWC), an independent, member-owned utility.
Denver Water draws from South Platte River and Blue River watersheds on both sides of the Continental Divide. CMWC sources water from its own treatment facility and purchases supplemental treated water, creating a blended supply. This dual-provider arrangement means that water quality, hardness, and treatment characteristics can differ significantly depending on which part of Lakewood you live in.
How Lakewood's Water Is Treated
Denver Water areas: Water is treated at the Marston and Moffat treatment plants using conventional treatment (coagulation, sedimentation, filtration), chloramine disinfection, and orthophosphate for corrosion control. Fluoride is added for dental health. This is the same high-quality treatment that serves the City of Denver.
CMWC areas: Consolidated Mutual operates its own treatment facility and also purchases treated water that it blends with its own supply. Treatment methods and water characteristics may differ from Denver Water's profile. CMWC publishes its own annual water quality report, separate from Denver Water's.
Understanding which provider serves your address is the essential first step to interpreting your water quality.
Know Your Water Provider
Consolidated Mutual Water Company (CMWC) serves northwest Lakewood — roughly the area north of 6th Avenue and west of Wadsworth Boulevard, including parts of Wheat Ridge. If you live in this area, your water comes from CMWC, not Denver Water, and you should reference CMWC's water quality report rather than Denver Water's. Your water bill will indicate which utility serves your home. This distinction matters for understanding your water's hardness, treatment chemicals, and overall quality profile. When seeking water treatment solutions or interpreting test results, knowing your provider ensures you're comparing the right data.
Common Water Quality Concerns in Lakewood
Water hardness in Lakewood ranges from 3-9 grains per gallon, but the actual hardness at your tap depends heavily on which provider serves your home. Denver Water areas typically fall in the 3-8 gpg range with seasonal variation. CMWC areas may experience different hardness levels depending on the blend of self-treated and purchased water. This variability means that hardness-related issues — scale buildup, soap efficiency, dry skin — can differ significantly across neighborhoods.
Much of Lakewood sits at the outer edges of Denver Water's distribution system. Water traveling longer distances through the pipe network has more contact time with pipe materials, which can affect chloramine residual levels, temperature, and the potential for disinfection byproduct formation. Homes at the end of distribution branches may experience slightly different water characteristics than those closer to treatment facilities or major transmission mains.
Lakewood's development spans from the 1950s through modern construction, creating a patchwork of plumbing infrastructure ages. Older neighborhoods — particularly those built in the 1950s and 1960s — may have galvanized steel service lines, older copper plumbing with lead solder (pre-1986), and aging water mains. Newer developments have modern materials. This infrastructure variability means that water quality at the tap can differ significantly between adjacent neighborhoods based solely on the age of the pipes it flows through.
Residents in older Lakewood neighborhoods — including areas around Eiber, Morse Park, and Belmar — occasionally report rusty or discolored water. This is typically caused by iron and manganese sediment in aging distribution mains being disturbed by flow changes, hydrant flushing, or water main breaks. While not a health concern at typical levels, it is aesthetically unpleasant and can stain laundry and fixtures. Running cold water for several minutes usually clears the discoloration.
The most distinctive aspect of resident feedback in Lakewood is the difference between Denver Water and CMWC customers. Denver Water customers generally report experiences consistent with Denver proper — moderate hardness, mild chloramine taste, and occasional seasonal changes. CMWC customers sometimes report a noticeably different water feel and taste, with some noting harder water, different aesthetic qualities, or more variability. Residents who have lived in both service areas within Lakewood often comment on the perceptible difference between the two providers.
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Why Test at the Tap?
With two different water providers, varying infrastructure ages, and distribution distance effects, Lakewood is a city where tap-level testing is especially valuable. Your utility's annual report tells you about water quality at the point of treatment — not at your faucet. Testing at the tap reveals what your specific plumbing, your specific provider, and your specific location in the distribution system deliver to your glass.
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