Marion Water Hardness & Quality Report (2026)

Marion Water Department serves the city of Marion and surrounding areas in Marion County, Ohio. The primary water sources are surface water from the Marion City Lake and Lake George reservoirs, situated within the upper Scioto River basin. The department operates a conventional surface water treatment plant, with supplemental purchases from the Crittenden-Livingston Water District sourced from the lower Cumberland River. The service area covers residential, commercial, and industrial users, with standard surface water treatment delivering safe drinking water throughout the region.

The watershed encompasses the Marion reservoirs within the upper Scioto River basin, characterized by glacial drift overlying Pennsylvanian-age sedimentary rocks including limestone and shale of the Conemaugh and Allegheny Groups. These carbonate-rich formations impart a hard character to the water through natural mineral dissolution. Limestone outcrops and glacial deposits in the watershed further influence surface water chemistry through mineral leaching, and agricultural land use contributes agrichemical monitoring considerations.

Hard water in Marion leads to scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Affected appliances require more frequent maintenance or descaling. A water softener is recommended to mitigate these effects, improving soap efficiency and preventing dry skin or spotting on fixtures. Recent reports note taste, odor, and discoloration issues attributed to geosmin, addressed by treatment adjustments; the water remains safe per Ohio EPA. Sodium levels reach 250–500 mg/L, and turbidity is consistently well-controlled through the conventional treatment process.