Kettering Water Hardness & Quality Report (2026)

Kettering, Ohio, receives its drinking water from the Montgomery County Water Department, sourced via the City of Dayton Water Department. The primary source is the Great Miami Buried Valley Aquifer, with water extracted from well fields and treated at Dayton's facilities before distribution. The utility serves approximately 250,000 customers across the Dayton–Kettering region, conducting over 12,000 tests annually to ensure compliance with state and federal standards. The supply draws from the Great Miami River watershed, spanning 6,700 square miles in west-central Ohio and eastern Indiana.

Underlying geology includes Pleistocene glacial deposits overlying Paleozoic carbonate bedrock — specifically Silurian dolomites and Devonian limestones such as the Columbus Limestone — which impart a hard character through natural mineral dissolution. The Great Miami Buried Valley Aquifer is unconfined, with thin clay caps and surface water recharge driving an elevated mineral profile. Prolonged contact of groundwater with these carbonate-rich formations leaches calcium and magnesium, yielding consistently hard water throughout the service area.

As a hard water supply, Kettering's water promotes scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan while increasing energy costs. Soap lathering is less effective, potentially leading to dry skin and laundry residue. Regular descaling of fixtures, installing sediment filters, and flushing hot water tanks are recommended; a water softener is advised for households noticing these effects. The Montgomery County supply includes softening to reduce mineral content. Treated water maintains a neutral to slightly alkaline pH supporting corrosion control, and consistently meets EPA standards.