Reading Water Hardness & Quality Report (2026)

The Town of Reading Department of Public Works supplies drinking water to Reading, Middlesex County, Massachusetts. Reading purchases surface water wholesale from the Massachusetts Water Resources Authority (MWRA), which operates the Quabbin Reservoir and Wachusett Reservoir systems in central Massachusetts. Water is treated at MWRA facilities and distributed through Reading's municipal system located at 16 Lowell Street. Treatment includes chloramines, hypochlorite, ozone, and UV light disinfection, providing a multi-barrier approach that consistently meets all applicable state and federal drinking water standards.

Reading's water originates from the Quabbin and Wachusett Reservoir watersheds, which drain terrain underlain by Precambrian metamorphic bedrock — granite, gneiss, and schist — along with Paleozoic sedimentary rocks. The New England uplands geology, dominated by crystalline basement rocks with limited soluble mineral content, produces naturally soft water. These oligotrophic reservoirs carry low mineral loading, contributing to the consistently soft character of the MWRA supply throughout the distribution network.

At soft hardness levels, Reading residents experience minimal scale buildup in pipes, water heaters, and appliances. Soap and detergents perform efficiently without a water softener, and dishwashers and washing machines need no special adjustment for mineral precipitation. MWRA reports a pH of approximately 9.0–9.5 post-treatment, with very low manganese levels (5–10 ppb, well below aesthetic and health advisory standards). Current water quality meets all EPA Maximum Contaminant Level goals; disinfection byproducts are managed through the multi-barrier treatment process. No softener is recommended for typical household use.