New Castle Water Hardness & Quality Report (2026)

New Castle Utilities serves approximately 19,880 residents in New Castle, Henry County, Indiana. The utility draws water exclusively from groundwater sources, treated via filtration and disinfection with chlorine at facilities located at 415 Broad Street, New Castle, IN 47362; the utility can be reached at 765-521-6841. This municipal system provides drinking water compliant with EPA standards across its service area, relying entirely on groundwater without surface water supplementation. Annual Consumer Confidence Reports are issued to keep customers informed about water quality and monitoring results.

The groundwater originates from aquifers embedded in the region's Paleozoic carbonate bedrock, including Silurian dolomites and limestones of the Salina and Niagaran series, overlain by glacial deposits. These formations characterize east-central Indiana's hydrogeology, where mineral-rich dissolution from carbonate rocks imparts a hard supply profile. The karst-influenced aquifer system lacks significant surface watershed inputs, concentrating water chemistry on geological leaching from the Paleozoic strata rather than atmospheric or soil influences.

Very hard water promotes limescale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Faucet aerators and coffee makers are particularly prone to clogging, increasing energy costs and maintenance needs. Regular cleaning of aerators, installing scale-inhibiting filters, and flushing hot water systems annually help mitigate effects; a water softener is recommended for households to prevent scaling and improve soap efficiency. Water quality testing confirms compliance with all EPA Maximum Contaminant Level Goals, with no contaminants exceeding health-based guidelines; treatment involves filtration and chlorination for microbial control.