Bendigo Water Hardness & Quality Report (2026)

Bendigo's drinking water is supplied by Coliban Water, drawn from Lake Eppalock on the Campaspe River — the region's dominant storage — and supplemented by the Malmsbury Reservoir on the Coliban River system in central Victoria. Water hardness in Bendigo is measured at 55 mg/L — classified as soft — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. The mixed surface and rural channel supply serves a large central Victorian region beyond the city itself.

Bendigo's supply reflects the geology of the central Victorian highlands. The Campaspe River and Coliban River catchments drain through Cambrian and Ordovician sedimentary formations — the fractured slates, phyllites, and metasediments of the Victorian goldfields terrain — as well as alluvial plains deposits in the Campaspe valley. This mixed geology contributes a modest but consistent mineral load to storage, producing hardness slightly higher than Melbourne's pure granite-sourced supply, though still firmly in the soft category.

Bendigo residents see minimal limescale accumulation on taps, kettles, and shower fittings — descaling every two to three months is typically sufficient. Hot water systems accumulate light scale over time, and periodic checks help sustain heating efficiency. Central Highlands and Coliban Water service areas experience some seasonal variation in supply turbidity after summer storms, and a cartridge filter under the bench is a popular option for improved taste. Overall, the soft supply presents few challenges for household appliances and plumbing throughout the Bendigo region.