Upper Arlington Water Hardness & Quality Report (2026)

Upper Arlington, Ohio receives its water from the City of Columbus Division of Water, which serves Franklin County and surrounding areas including Upper Arlington in northwest Franklin County. The utility sources surface water from the Scioto River and Big Walnut Creek, supplemented by groundwater pumped from sand and gravel deposits in the Scioto River Valley. Treatment occurs at Columbus facilities including the Hap Cremean Water Plant and Dublin Road Plant, processing millions of gallons daily for distribution across the service area.

The supply originates in the Scioto River watershed, draining central Ohio's glacial landscape with tributaries like Big Walnut Creek. The underlying geology includes unconsolidated Quaternary glacial sand and gravel overlying Devonian Columbus Limestone and Silurian dolomite formations, which impart a hard character to the water through mineral dissolution. The permeable valley deposits allow groundwater recharge with dissolved calcium and magnesium from limestone bedrock, while surface flows pick up ions from similar lithologies, resulting in a consistently mineralized, hard supply.

Hard water in this range leads to scale buildup in pipes, heaters, and fixtures—hot water heaters and dishwashers are most affected, often requiring 20–30% more energy. Soap lathering decreases, leaving spots on dishes and residue on skin and hair. Maintenance includes regular descaling with vinegar, installing drain screens, and flushing heaters biannually; a water softener is recommended for whole-house treatment to extend appliance life. Upper Arlington's tap water meets EPA standards with zero violations since 2023; the Columbus system treats via coagulation, sedimentation, filtration, and chloramination for disinfection.