Littleton Water Hardness & Quality Report (2026)

Littleton Water and Light Department serves the city of Littleton in Arapahoe County, Colorado, providing drinking water to residential and commercial customers. The primary source is snowmelt and runoff from the South Platte River basin, particularly the Gale River sub-basin within the White Mountain National Forest at the base of Garfield Mountain. Water is delivered by gravity to most customers, supplemented as needed by a local bedrock artesian well. No specific treatment plant names are detailed in available reports, but the utility confirms compliance with state and federal regulations without hardness removal during processing.

The South Platte River watershed spans the Front Range, encompassing granitic and metamorphic rocks of Precambrian age in the mountains, overlain by sedimentary formations such as the Pennsylvanian Fountain Formation and Permian Lyons Sandstone. These contribute natural minerals to the supply, shaping a moderately mineralised character. Snowmelt provides dilution during high runoff periods, while winter conditions and groundwater inputs from fractured igneous and metamorphic bedrock aquifers increase mineral contact, enhancing mineral content without posing health risks.

Hard water at this level promotes scale buildup in hot water pipes, heaters, boilers, and appliances like dishwashers and washing machines. It reduces soap lathering efficiency, leaving films on dishes, laundry, and skin; maintenance involves regular descaling and using more detergent. Residents often install ion-exchange water softeners using sodium or potassium chloride to extend appliance life and improve cleaning results. Third-party tests note arsenic exceeding health guidelines from natural soil and bedrock; treatment focuses on disinfection and basic processing without softening, with gravity-fed delivery emphasising source protection.