Littleton, Colorado’s Home for
Water Softeners, Water Filters,
& Water Delivery

Yes. Littleton’s drinking water meets federal and state drinking water standards. Most Littleton residents receive water supplied by Arapahoe County systems. The city completes required testing for regulated contaminants, and results are reviewed to confirm compliance with Safe Drinking Water Act requirements.

Yes. Littleton’s tap water is generally considered moderately hard. Water supplied by Arapahoe County systems typically contains hardness minerals such as calcium and magnesium, which can contribute to scale buildup on plumbing fixtures, water heaters, and appliances, reduce soap efficiency, and leave mineral residue on glassware and surfaces.

Recent sampling for Littleton-area 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, some PFAS compounds have been detected at low parts-per-trillion levels. Click here to learn more about our whole house PFAS filtration systems.

Yes. Fluoride is present in Littleton-area drinking water, either from naturally occurring mineral deposits or controlled treatment processes. Fluoride occurs naturally from mineral deposits and is monitored regularly as part of Denver’s water quality testing.

Littleton’s drinking water primarily comes from a combination of groundwater sources and treated water supplied through regional partnerships. These sources include shallow and deep aquifers within the Denver Basin, as well as water treated at the Joint Water Purification Plant (JWPP), which serves multiple communities in Arapahoe County. Water sources may vary seasonally based on availability and demand.

Water serving Littleton is treated using multi-step municipal treatment processes. These include filtration to remove particles, disinfection to eliminate bacteria and viruses, and additional treatment steps designed to control corrosion and maintain water quality throughout the distribution system before reaching homes and businesses.

While Littleton’s water meets all safety standards, many homeowners choose additional treatment to address moderate hardness, scale buildup, taste, or trace contaminants. A water softener can help protect plumbing and appliances from mineral scale, while filtration systems can further improve drinking water taste, odor, and clarity at the tap.

Arapahoe County water providers operate extensive monitoring programs that include thousands of water samples collected annually. Testing occurs across source water, treatment facilities, storage tanks, and distribution lines to ensure compliance with state and federal drinking water standards. Results are published in annual water quality reports and reviewed by the Colorado Department of Public Health and Environment.

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