Hervey Bay Water Hardness & Quality Report (2026)

Hervey Bay's drinking water is supplied by Fraser Coast Regional Council Water, drawn from Lenthalls Dam on the Burrum River near Maryborough, the primary storage for the Fraser Coast region in Queensland. Water hardness in Hervey Bay is measured at 155 mg/L — classified as moderately hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. The Lenthalls Dam catchment on the Burrum River provides the shared water source for both Hervey Bay and Maryborough across the Wide Bay area.

Hervey Bay's moderate hardness reflects the geology of the Burrum River catchment. The Burrum River drains through Triassic–Jurassic sedimentary sequences of the Bundaberg Basin — including alluvial and coastal plain deposits across the Fraser Coast lowlands — where water moving through calcium-bearing sands, gravels, and carbonate-cemented formations picks up a consistent mineral load before entering Lenthalls Dam storage. The region's proximity to the Wide Bay coastal plain, with its marine-derived carbonate sediments, further contributes to elevated hardness relative to more mountainous Queensland catchments.

Hervey Bay residents experience moderate limescale build-up on tap fittings, in kettles, and around shower fittings — descaling every four to six weeks is typical. Hot water systems accumulate scale on heating elements over time, and an annual inspection is worthwhile to maintain efficiency. Under Queensland water restrictions — which can apply during prolonged dry periods across the Wide Bay region — residents are encouraged to limit outdoor watering. Fraser Coast Regional Council provides water quality reports at frasercoast.qld.gov.au, with all ADWG health parameters consistently met.