Commerce City, Colorado’s Home
for Water Softeners, Water Filters,
& Water Delivery

Yes. Commerce City’s drinking water meets federal and state drinking water standards. The city completes required testing for regulated contaminants, and results are reviewed to confirm compliance with Safe Drinking Water Act requirements.

Commerce City tap water is considered moderately hard to hard, depending on seasonal source blending. Average hardness typically ranges between approximately 95–230 parts per million (ppm) as calcium carbonate. Hard water can contribute to scale buildup in plumbing systems, reduce soap efficiency, and leave mineral residue on fixtures, dishes, and appliances.

Recent sampling for Commerce City, Colorado water detected the presence of PFAS chemicals. The EPA is in the process of setting new MCL (maximum contaminant levels), which range from 4 to 10 parts per trillion. In numbers, that would be 0.00000000004 for PFOA and PFOS, individually, to 0.0000000001 for PFNA, PFHxS, and HFPO-DA (GenX Chemicals). As you can see in the water quality report, many samples do not meet these standards. Detected PFAS compounds include PFBA, PFHxA, PFPeA, PFBS, PFOS, and others, with some individual samples exceeding emerging EPA health advisory thresholds. Click here to learn more about our whole house PFAS filtration systems.

Yes. Fluoride is added to Commerce City tap water as part of the treatment process to help promote dental health. Average fluoride levels are approximately 0.8 ppm, which is below the EPA’s maximum contaminant level of 4.0 ppm and within recommended public health guidelines.

Commerce City’s drinking water comes from a combination of groundwater and treated surface water. Groundwater is pumped from eleven shallow alluvial wells drawing from aquifers connected to the South Platte River, and three deep wells from the Arapahoe formation. In addition, treated surface water is purchased from Denver Water, which sources its supply from rivers, lakes, and reservoirs throughout Colorado’s Front Range and mountain watersheds. All groundwater is treated at the Klein Water Treatment Facility before blending with Denver Water and delivery to customers.

Commerce City treats its water using a multi-step municipal treatment process. This includes chemical coagulation, filtration to remove particles and microorganisms, and disinfection using chlorine to eliminate bacteria and viruses. Fluoride is added for dental health, and corrosion inhibitors are used to reduce lead and copper leaching from plumbing. Continuous monitoring ensures consistent water quality and regulatory compliance before water enters the distribution system.

Many Commerce City homeowners choose to install water softeners and filtration systems due to moderately hard water, PFAS detections, and the presence of disinfection byproducts and trace contaminants. Filtration systems can help reduce PFAS, chlorine, sediment, heavy metals, and other contaminants, improving taste, odor, and long-term household water quality.

Commerce City operates an extensive water quality monitoring program that includes thousands of samples collected annually across source waters, treatment facilities, storage tanks, and distribution lines. Testing covers regulated contaminants, disinfectants, disinfection byproducts, heavy metals, radionuclides, nitrates, and emerging contaminants such as PFAS.

In August 2024, the Colorado Department of Public Health and Environment identified a non-health-based Backflow Prevention and Cross-Connection Control Rule violation, related to delayed correction of cross-connection deficiencies at three commercial properties. No contamination occurred, and drinking water quality was not impacted. The issues were corrected, and the violation is considered resolved.

You can access the most recent Commerce City Tap Water Quality Report here.