Drinking water quality updates

Update: Tuesday, 13 March 2018

Wannon Water is currently experiencing some seasonal algae in the raw water storages that supply Warrnambool. The drinking water supplied to customers is perfectly safe to drink but some Warrnambool customers may notice an earthy taste or odour. We are currently working to change over the supply of water entering the water treatment plant, which should help improve the taste and odour in the coming days.

We apologise for any inconvenience. If customers have any ongoing concerns, please contact us.

Algae Information

Many factors may contribute to water taste, smell and odour problems. The significant factors are algae and chlorine.

Algae often grow in water storages particularly over the hotter summer months. As the bloom recedes and the algae die off they will release chemical substances into the water that may cause a disagreeable taste and odour.

Wannon Water controls potential algae problems by adopting the following management approaches:

  • Algae prevention:¬†Wannon Water regularly monitors water storages for the presence of algae. If algae are detected in high numbers, if possible, the affected water storage will be taken off line.
  • Water treatment: Conventional water treatment plants, like the plant serving Warrnambool, Hamilton, Camperdown, Cobden, Terang, Balmoral, Glenthompson, Casterton and Simpson treat water by a filtering process that will remove the majority of sediments and some taste and odour compounds.
  • Water testing: Monitoring and testing is conducted to assess the taste, colour and appearance of water.
    • Physical parameters such as pH, turbidity, hardness, alkalinity and colour of water are measured
    • Chemical monitoring occurs to identify chemicals from the source water, which can also affect the aesthetic properties of water.¬†
    • Algae monitoring - algae can impact¬†significantly on taste and odour.

For further information about drinking water and the treatment process click here.