Lower rainfall and storage levels at the West Barwon Reservoir have combined with warmer weather to create a growing bloom of blue-green algae, which Barwon Water is keeping an eye on.
The increased algae in the reservoir are visible and have changed the water’s appearance to a deeper shade of green, but the dominant species of algae remain non-toxic. Barwon Water has said that it will continue to monitor the bloom for further changes.
Barwon Water’s Chief Scientist, Dr Will Buchanan, said that water from the reservoir is treated to the highest quality to meet all drinking guidelines.
“Treatment at the Forrest Water Treatment Plant is continually optimised to ensure water is safe for customers to drink,” Dr Buchanan said.
Blue-green algae occur naturally in all water ecosystems including creeks, rivers, lakes and wetlands.
Signage remains in place around the reservoir, which is in the Otway Ranges National Park, to notify visitors of the algae bloom.
While fishing in the reservoir should be avoided, people can still enjoy birdwatching, walking, mountain biking and picnicking.
Barwon Water said that it will continue to monitor the algae bloom and work closely with relevant agencies in accordance with the Blue-Green Algae Regional Coordination Plan, including the coordination of environmental water releases with the Corangamite Catchment Management Authority.
As utility approaches the end of its filling season, water transfers to Wurdee Buloc Reservoir from the West Barwon Reservoir have reduced and will soon stop.
Overall storage levels in the Geelong region currently sit around 61 per cent capacity, with the community reminded of the ongoing need to ensure all drinking water is used wisely.
