Sterling Water Hardness & Quality Report (2026)

The City of Sterling Municipal Water Company supplies approximately 14,000 residents in Sterling, Logan County, northeastern Colorado. Their water comes from two main sources: surface water drawn from the South Platte River and groundwater pumped from the Ogallala Aquifer through wells. All water is treated at the city's municipal water treatment plant, where it undergoes coagulation, sedimentation, filtration, and disinfection with chlorine, along with fluoridation, to meet federal EPA standards. The utility operates under the regulation of the Colorado Department of Public Health & Environment and provides annual Consumer Confidence Reports to detail its compliance.

Sterling's water originates in the South Platte River Basin, draining parts of the Front Range and High Plains. The watershed crosses ancient Paleozoic and Mesozoic sedimentary rock layers, including Cretaceous shales and limestones, before water seeps into the Quaternary Ogallala Aquifer. This vast, gravelly aquifer system is recharged by the river. The underlying geology, rich in dissolved minerals from Tertiary sands and gravels, creates a hard water supply. Evaporation in the semi-arid climate further concentrates these minerals, unlike the softer waters found in the Rocky Mountains' granitic headwaters. Seasonal irrigation return flows also contribute to the water's mineral content.

Homeowners in Sterling often notice scale buildup in pipes, water heaters, dishwashers, and washing machines, which can reduce appliance efficiency and shorten their lifespan. You might see a 20-30% increase in energy usage for affected appliances. Fixtures can develop stubborn stains, and you'll likely find that soap doesn't lather as well, meaning you'll need more detergent. Regular maintenance, such as descaling water heaters annually and flushing systems, is advised. Many residents find that installing a water softener is the best way to prevent damage and improve the water's usability, particularly given the mineral content from the Ogallala Aquifer.