Southington Water Hardness & Quality Report (2026)

Southington, Connecticut, in Hartford County — a major Greater Hartford south suburban community, home of the Aqua-Turf Club, historic Apple Harvest Festival (Southington is a major Connecticut apple-growing community), and a diverse Hartford County suburban city with a strong Italian-American heritage and significant manufacturing history (associated with the Stanley Works and other Connecticut Valley precision manufacturing firms) — draws its municipal water supply from the Shuttle Meadow Reservoir and Patton Brook watershed via the Town of Southington Water Division. Water hardness in Southington measures 42 mg/L — classified as very soft.

Southington's very soft supply reflects the south Hartford County reservoir watersheds' calcium-poor geology. The Shuttle Meadow Reservoir watershed drains the Southington Range and New England Upland — predominantly Proterozoic–Ordovician calcareous-poor granite and gneiss of the Connecticut Eastern Uplands (Ratlum Mountain Schist and New Haven Arkose — calcareous-poor). The Hartford Basin Jurassic Portland Arkose (which underlies much of central Connecticut) contributes minimally to hardness in the Southington reservoir catchment because the upland crystalline terrain dominates the watershed. The calcareous-poor granite and gneiss watershed produces the very soft 42 mg/L at Southington.

With hardness at 42 mg/L, Southington residents enjoy very soft water with minimal scale challenges. Town of Southington Water Division consistently delivers water meeting all Connecticut DEEP and EPA Safe Drinking Water Act requirements.