Glenorchy Water Hardness & Quality Report (2026)

Glenorchy's drinking water is supplied by TasWater (Tasmanian Water and Sewerage Corporation), drawing from the Wellington Range catchment reservoirs via the greater Hobart metropolitan water supply system for the Glenorchy City Council LGA northern Hobart distribution in Tasmania. Water hardness in Glenorchy is measured at 22 mg/L — classified as very soft — well below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Glenorchy — the second-largest city in Tasmania and a key northern suburb of the Hobart metropolitan area, known for the Glenorchy City Council community, the Macquarie Point and Cadbury chocolate factory at Claremont, the Glenorchy Arts and Wellbeing Centre, the Regatta Point–Glenorchy foreshore on the Derwent River, and the northern Hobart residential and light industrial community — receives exceptionally soft supply consistent with the soft character of the TasWater Wellington Range catchment system.

Glenorchy's very soft supply reflects the extremely soft character of the Wellington Range catchment geology. The Wellington Range includes the Mount Wellington (kunanyi) plateau, comprising Jurassic dolerite sills and Precambrian quartzite and Permian sandstone formations — all extremely chemically resistant rock types contributing virtually zero dissolved minerals to rainfall runoff. At 22 mg/L and TDS 41.8 mg/L, Glenorchy's supply is very soft, slightly harder than the inner Sandy Bay Hobart sub-zone (14.5 mg/L) — the difference reflecting a slightly different distribution routing or blending proportion from the Wellington Range supply system at the Glenorchy northern Hobart sub-zone.

Glenorchy residents enjoy virtually no limescale accumulation on taps and in kettles — descaling is rarely needed. Hot water systems accumulate minimal scale. The low lead reading (0.003 mg/L) is good. TasWater provides water quality information at taswater.com.au, with all ADWG health standards consistently met. Glenorchy's Derwent River foreshore community and the northern Hobart residential corridor benefit from this exceptionally soft supply meeting all ADWG standards.