Natick Water Hardness & Quality Report (2026)

Natick, Massachusetts, in Middlesex County — a major MetroWest Massachusetts suburban community (Natick is one of the most significant MetroWest Massachusetts towns — a Boston western suburb in the I-90/Mass Pike corridor with a major retail concentration at the Natick Collection (one of the largest and most upscale shopping centers in New England), a significant corporate and technology presence, and historically one of the most prosperous towns in the MetroWest region), home of the US Army Soldier Systems Center (the Natick Labs — one of the most important military research facilities in the country for soldier equipment and gear, responsible for developing the standard US military ration — MRE — and much modern soldier equipment), a diverse Middlesex County community with a significant Korean-American, Indian-American, and professional population, and adjacent to Lake Cochituate — draws its municipal water supply from Lake Cochituate via the Natick DPW Water Division. Water hardness in Natick measures 91 mg/L — classified as moderately soft.

Natick's moderate softness reflects the MetroWest Massachusetts reservoir watershed's calcareous-poor crystalline geology. The Lake Cochituate watershed drains the Precambrian Dedham Granite and Milford Pink Granite (calcareous-poor crystalline basement). Natick DPW produces the moderately soft 91 mg/L.

With hardness at 91 mg/L, Natick residents enjoy moderately soft water. Natick DPW Water Division consistently delivers water meeting all Massachusetts DEP and EPA Safe Drinking Water Act requirements.