Algal Bloom Information
Stay up to date
This information is provided by the State Government. For the latest updates, news and official guidance, please visit the State Government’s algal bloom website. For the latest Rowing SA information, please read our Circulars.
How to stay safe
The risk to the general public is low if you follow public health advice:
Avoid discoloured or foamy water
Stay out of water that looks discoloured or has foam on the surface.
Leave dead fish alone
Do not touch or eat dead fish that have washed up on shore.
Keep pets away
Keep pets away from foamy or discoloured water, and do not let them eat dead fish.
Rowing in the algal bloom
Rowing is an on-water sport, not an in-water sport. Because rowers are not immersed in the water, their exposure is generally reduced. However, incidental contact can occur when handling boats or during a capsize. Equipment checks, good hygiene and close supervision all significantly reduce the risk of exposure.
When algal material is broken up and becomes airborne, for example through wave action or spray, it can irritate the eyes, skin and airways. If you are affected, move away from the area and get some fresh air.
Best practice for rowing clubs and schools
- ✓Stay informed. Keep checking Department for Environment and Water (DEW) and SA Health updates for the latest water-quality alerts and guidance.
- ✓Share the information. Pass these updates on to coaches, students and families.
About the algal bloom
What is an algal bloom?
An algal bloom happens when tiny plant-like organisms in the water, called algae, grow very quickly and in large numbers. The current bloom was first seen in mid-March 2025 near Waitpinga and Parsons beaches on the Fleurieu Peninsula.
Should I be worried about the algal bloom?
The bloom has had a serious impact on marine life and on the industries that rely on it, especially fishing, aquaculture and tourism. However, beachgoers are not in danger if they follow public health advice: avoid discoloured and foamy water, and do not eat dead fish. This is a natural event, and it is being taken seriously.
Is it dangerous?
Some algal blooms are harmless. However, Karenia blooms, like the one affecting South Australia, can be toxic to marine life and harm fish, shellfish and other sea animals. The risk to the general public is low.