Avon Water Hardness & Quality Report (2026)

The Citizens Energy Group provides water services to Avon, Indiana, drawing primarily from surface water sources including the White River and Eagle Creek Reservoir. The utility treats and distributes water across Marion County and surrounding suburbs like Avon, serving over 800,000 customers through an extensive network of pipes and storage facilities. Avon receives blended water from these sources without local treatment plants, with the White River feeding the White River and White River North treatment plants, and Eagle Creek Reservoir supplying the T.W. Ward facility.

The region's geology features glacial deposits overlying Mississippian-age limestone and dolomite bedrock formations, such as the Salem and St. Louis Limestones, which are rich in calcium and magnesium carbonates. These karst-influenced formations contribute dissolved minerals to both surface runoff and groundwater interactions, resulting in a characteristically hard supply due to high concentrations of calcium and magnesium ions leached from the carbonate rocks during water percolation and river flow. The Central Till Plain physiographic province of Indiana plays a significant role in shaping the local water chemistry.

To mitigate the effects of hard water, residents can consider installing a whole-house water softener to extend appliance life and improve cleaning performance. Regular vinegar descaling of showerheads and faucets helps, while annual water heater flushing prevents sediment accumulation. The Citizens Energy Group maintains compliance with EPA standards, and the water is naturally alkaline with a pH around 7.5-8.5. For address-specific data, contact 317-924-3311, and to minimize scale buildup, homeowners can take proactive steps to protect their pipes, water heaters, dishwashers, and washing machines.