Dalby Water Hardness & Quality Report (2026)

Dalby's drinking water is supplied by the Western Downs Regional Council, drawing from Greenwood Weir on the Condamine River supplemented by Condamine alluvial groundwater bores for the Western Downs regional community in Queensland's Darling Downs. Water hardness in Dalby is measured at 184.5 mg/L — classified as hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Dalby — a prosperous regional city of the Western Downs on the Condamine River 210 km west of Brisbane, the commercial centre of the Darling Downs cotton and grain growing region, known for the Dalby Showgrounds, the Western Downs Discovery Centre, and the agricultural service industry community — carries hard supply reflecting the mineralised geology of the Darling Downs alluvial plain.

Dalby's hard supply reflects the mineralised Condamine River alluvial catchment and supplementary Condamine alluvial aquifer groundwater sources. The Condamine River drains the fertile black soil plains of the Darling Downs — deep Tertiary volcanic basalt-derived heavy clay soils formed from the Condamine's headwater Granite Belt catchments and the surrounding Darling Downs basaltic tableland — accumulating dissolved calcium, magnesium, and carbonates before reaching Greenwood Weir. The Dalby distribution at 184.5 mg/L and TDS 412.7 mg/L reflects the hard character of the Darling Downs agricultural plain supply.

Dalby residents face moderate-to-significant limescale build-up on taps and in kettles — descaling every four to six weeks is typical. Hot water systems benefit from periodic inspection. The very low lead reading (0.001 mg/L) is excellent. Western Downs Regional Council provides water quality data online, with all ADWG health standards consistently met. Dalby's Darling Downs agricultural city and surrounding rural community benefit from supply meeting all ADWG safe drinking standards.