Norwood Water Hardness & Quality Report (2026)

Norwood Water Department, serving the Town of Norwood in Norfolk County, Massachusetts (population ~29,000), purchases all its supply from the Massachusetts Water Resources Authority (MWRA). The primary source is the Quabbin Reservoir (118 billion gallons capacity), fed by the Swift River, with backup from Wachusett Reservoir on the Nashua River. Water is treated at the Carroll Water Treatment Plant in Marlborough, MA, before distribution via 85 miles of mains to Norwood's service area, purchased through MWRA connections in Canton, MA. No local wells or groundwater are used.

The Quabbin-Wachusett watershed spans 165 square miles of protected forest in central Massachusetts within the Berkshire Hills and Quabbin uplands. Bedrock consists of Avalonian terrane granites and gneisses (Proterozoic Z to Ordovician), overlain by glacial drift from the Wisconsinan glaciation. Lacking carbonate rocks like limestone or marble, the geology yields very soft water with low natural mineralization; runoff from forested slopes adds organic matter but minimal hardness ions, shaped by acidic New England rainfall on granitic soils.

As a soft water supply, Norwood experiences minimal scale buildup in pipes, heaters, or appliances — no limescale in kettles or toilets, and soap lathers easily without scum. Hot water heaters and dishwashers last longer with less maintenance; no deliming is needed. A softener is not recommended and could over-soften, risking corrosion in copper pipes; focus on sediment filters if needed. MWRA water meets all EPA standards per 2023 CCR: pH 9.0–9.5, chloramines for disinfection, no lead/copper exceedances (90th percentile copper <0.5 mg/L), PFAS below detection (<4 ppt), turbidity <0.1 NTU; treatment includes ozonation, filtration, UV backup, and fluoridation (0.7 mg/L) with corrosion control via pH adjustment and orthophosphate.