2025 Water Quality Data Now Available
We’ve completed a major data refresh, adding 2025 water quality results from utilities across Australia. If you haven’t checked your suburb’s water quality recently, now is a great time to take a look.
Which utilities have been updated?
The following utilities have had their latest annual reports incorporated into WaterScore:
- Sydney Water — 2024–25 drinking water quality report
- Melbourne Water — 2024–25 annual water quality data
- SA Water — 2024–25 drinking water quality report
- Water Corporation (WA) — 2024–25 annual report
- Urban Utilities (QLD) — 2024–25 water quality results
- Unitywater (QLD) — 2024–25 annual drinking water quality
- Icon Water (ACT) — 2024–25 drinking water quality report
- TasWater — 2024–25 water quality data
- Power and Water Corporation (NT) — 2024–25 results
Regional utilities including Hunter Water, Barwon Water, and Central Highlands Water have also been updated.
What changed?
Overall, Australian tap water continues to meet the Australian Drinking Water Guidelines across the vast majority of suburbs. Here are some notable trends we observed in the 2025 data:
Hardness shifts in South Australia — Several Adelaide suburbs saw slight increases in total hardness, consistent with changing source water blends. If you’re in SA, it’s worth checking whether your suburb’s hardness score has changed.
Improved turbidity in regional Victoria — A number of regional Victorian suburbs showed lower turbidity readings compared to previous years, likely reflecting infrastructure upgrades at several treatment plants.
Stable chlorine levels nationally — Chlorine residual levels remained consistent across most capital city networks, staying well within guideline values. For more on chlorine in tap water, see our guide to chlorine in Australian tap water.
pH adjustments in South East Queensland — Some suburbs serviced by Urban Utilities and Unitywater showed minor pH adjustments, with readings trending slightly higher compared to previous reporting periods.
How WaterScores are recalculated
When new data comes in, we recalculate every affected suburb’s WaterScore using the same transparent methodology. Scores are weighted across key parameters and benchmarked against ADWG guideline values. This means your suburb’s score may have gone up or down — both reflect real changes in water quality data, not changes in how we calculate scores.
Check your suburb
Head to the homepage and search for your suburb to see your updated water quality data and WaterScore. You can also compare your suburb with others using our comparison tool.
Questions about the data? Contact us — we’re always happy to help.