Marysville Water Hardness & Quality Report (2026)

The City of Marysville Division of Water serves the public water system in Union County, Ohio. The utility draws from surface water sources treated at the water treatment plant located at 209 S. Main Street, Marysville, OH 43040. Treatment methods include filtration and softening, with chlorine used as the primary disinfectant. The utility operates under an unconditioned license and reported full compliance with all federal and state drinking water standards in 2023. Customers may contact the Water Superintendent at 937-645-7330 or review the annual Consumer Confidence Report distributed by July 1 each year.

Marysville's water supply originates from the Scioto River watershed, which drains central Ohio's glaciated terrain. The underlying geology consists primarily of Ordovician and Silurian limestone and dolomite formations, characteristic of Ohio's carbonate bedrock. These soluble rock layers naturally elevate dissolved mineral content in the region's water, contributing to the moderately hard quality typical of central Ohio. The 2023 Water Quality Report classified Marysville's drinking water as having moderately high susceptibility to contamination, though all federal and state standards were met.

At moderately hard levels, Marysville residents may experience scale buildup on fixtures, reduced soap and detergent effectiveness, and potential staining on appliances over time. Water heaters, dishwashers, and washing machines are typically the most affected by mineral deposits. The utility's inclusion of softening in its treatment process helps mitigate these effects for the public supply. Residents with private wells or those seeking additional protection may benefit from point-of-use water softeners, though the municipal treatment already addresses hardness concerns for the public system.