Maryville Water Hardness & Quality Report (2026)

MARYVILLE PWS draws its water exclusively from surface sources: Maryville Reservoir and Mozingo Lake. These reservoirs, located in northwest Missouri within the Missouri River Basin watershed, supply the Maryville public water system which serves approximately 10,775 residents. Treatment at the facilities involves pre-oxidation with chlorine, filtration, and disinfection using a combination of chloramines, chlorine, chlorine dioxide, and hypochlorite. For inquiries, you can reach the utility at 660-562-8001 or by mail at 415 N MARKET PO BOX 438, Maryville, MO 64468.

The water's journey begins in the One Hundred and Two River sub-watershed, where agricultural lands and forested uplands contribute to the reservoirs. The bedrock beneath this region consists of Pennsylvanian-age limestones and shales, notably from the Cherokee Group. As these formations weather, they release alkaline earth metals, primarily calcium and magnesium, into the water. Unlike systems relying on groundwater aquifers, Maryville's surface water dynamics mean it is more exposed to these mineral-rich strata through runoff, resulting in a distinctly hard water profile.

This hard water can lead to noticeable limescale buildup in household appliances, including water heaters, dishwashers, coffee makers, and washing machines. Such buildup not only reduces the efficiency of these appliances but can significantly shorten their lifespan; for instance, water heaters might fail 30-50% sooner than expected without intervention. You might also find faucet aerators and showerheads clogging frequently, diminishing water flow. To manage this, regular maintenance like monthly descaling of fixtures with vinegar, annual flushing of water heaters, and using high-temperature detergents in washing machines is advised. Installing a water softener is often recommended to prevent unsightly spotting on dishes and glassware, extend the life of your plumbing, and improve the lathering of soaps and detergents.