Kennett Water Hardness & Quality Report (2026)

Kennett Board of Public Works draws its drinking water from four groundwater wells, each reaching depths between 100 and 130 feet. This supply originates from shallow aquifers within the Mississippi Embayment, a vast sedimentary basin in southeastern Missouri. The raw water is naturally high in quality, free from harmful bacteria and most chemicals. A central water treatment plant then processes this groundwater, focusing on removing excess iron and dissolved calcium to enhance its aesthetic and operational qualities for Kennett residents.

The groundwater percolates through unconsolidated sands and gravels from the Quaternary and Tertiary periods, which lie atop older Cretaceous marine sediments. These sedimentary layers are rich in minerals containing calcium and magnesium. As the water interacts with these formations, it dissolves these minerals, resulting in a moderately mineralized supply. This interaction with the sedimentary layers and underlying marine-deposited clays and sands ultimately gives the water its moderately hard character.

Over time, Kennett’s moderately hard water can lead to visible scale buildup on fixtures, showerheads, and heating elements, though it’s typically less severe than in very hard water areas. Appliances like water heaters and dishwashers might benefit from periodic descaling to maintain efficiency. Homeowners can manage deposits by regularly cleaning aerators and showerheads or using vinegar-based descaling agents; a water softener is an optional choice for most households. While the KBPW treats the water to remove iron and calcium, third-party analyses have detected certain trace chemicals above health-based guidelines, suggesting point-of-use filtration could offer additional peace of mind for sensitive individuals.