Changes to Portland’s water treatment

Wannon Water is changing the way Portland’s water is disinfected with the goal of maintaining the long-term safety and quality of the drinking water supply. 

Branch Manager Water Quality and Environmental Services Luke Dunlop said it involved switching from chloramine disinfection to free chlorine disinfection from next Monday, 27 July.

“We successfully trialled this treatment method last year and have now decided to implement it on a permanent basis,” Mr Dunlop said.

Mr Dunlop said the chlorine residual would always be within safe levels and comply with the Department of Health’s Safe Drinking Water Regulations.

“Customers can reduce any additional chlorine taste or smell in their drinking water by filling a jug from their tap and storing it in the fridge for a few hours before drinking. This is because chlorine dissipates naturally over time and is less noticeable in cold water.”

He advised customers who use tap water for home kidney dialysis to consult their healthcare provider for advice on whether any changes are necessary in their disinfection residual neutralisation procedures. Customers using tap water in aquariums should continue to treat any water used for fish tanks with an appropriate water conditioner or consult their aquarium vendors for specialised advice.

Portland residents may also notice additional fire hydrant flushing across the area over the next few weeks which will speed up the chlorination process.

This changed treatment process is separate to the Quality Water for Wannon (QWW) Program. QWW is a major project to improve the quality and taste of the water in Portland, Heywood and Port Fairy through the construction of new reverse osmosis water treatment plants in each town.

Following extensive community engagement last year, Wannon Water is aiming is to have a design and construct major works contract in place by early 2027.

Further information is available at wannonwater.com.au or by calling Wannon Water on 1300 926 666.

Want to know more?

Download our information sheet to learn more about the project.