Lee's Summit Water Hardness & Quality Report (2026)

The Lee's Summit Public Water Supply (PWS) serves approximately 99,400 residents across Lee's Summit and surrounding areas in Jackson County, Missouri. Water is purchased from Kansas City (up to 25 million gallons daily) and Independence (up to 7.5 million gallons daily), with emergency connections to Tri-County Water Authority. Kansas City's supply is 80% surface water from the Missouri River and 20% groundwater from the Missouri River alluvial aquifer well field near the river. Independence sources from wells in the same aquifer proximity. No additional treatment occurs at Lee's Summit; water is received post-treatment from both suppliers.

The Missouri River watershed drains limestone-rich terrains of the Ozark Plateaus and glacial till areas. Key formations include Pennsylvanian Cherokee Shale and Mississippian Burlington Limestone, which weather to release dissolved minerals into river flow and shallow aquifers. The Missouri River alluvial aquifer consists of unconsolidated sands and gravels in the river valley, recharged by river infiltration. This carbonate-dominated geology imparts a moderately mineralized character to the water supply, with natural bicarbonate buffering typical of Midwestern river systems.

At moderately hard levels, Lee's Summit water promotes limescale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Soap lathering is less effective, increasing detergent use. Maintenance includes regular vinegar descaling for appliances, installing drain screens, and flushing water heaters biannually. A water softener is recommended to mitigate spotting on dishes and glassware and reduce dry skin from mineral residues. Water quality scores 80/100; chloramines are used for disinfection and two contaminants exceed health guidelines including bromochloroacetic acid, though no EPA violations are noted.