Algal Bloom Information
The following information is provided by the State Government. For the latest updates, news, and official guidance, please visit the State Government’s website at https://www.algalbloom.sa.gov.au/.
Keep up to date with the latest Rowing SA information by reading our Circular’s.
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 algal bloom was first seen in mid-March 2025 near Waitpinga and Parsons beaches on the Fleurieu Peninsula.
Should you be worried about the algal bloom?
This bloom has had a serious impact on marine life and the industries that rely on it — especially fishing, aquaculture and tourism.
But for the average beachgoer, you’re not in danger if you follow public health advice to avoid entering discoloured and foamy waters as well not eating dead fish.
This is a natural phenomenon and being taken seriously.
Is it dangerous?
Some algal blooms are harmless. However, Karenia blooms, like the one currently affecting South Australia, can be toxic to marine life, harming fish, shellfish, and other sea animals.
While this bloom has significantly impacted fishing, aquaculture, and tourism, the risk to the general public is low. You can stay safe by:
Avoiding discoloured or foamy water
Not touching or consuming dead fish
- Keep your pets away from foamy or discoloured water and don’t let them eat dead fish that have washed up on shore.
Rowing in the algal bloom
Rowing is an on-water sport—not an “in-water” sport. This distinction matters because participants are not immersed in the water, which generally reduces exposure. However, in capsize situations or when handling boats, incidental contact can occur. Implementing equipment checks, hygiene measures, and vigilant supervision significantly reduces exposure risks.
When the algal material is broken up and becomes airborne (e.g., wave action, spray), it can irritate eyes, skin and airways. If affected, move away from exposure and seek fresh air.
Best Practices for Rowing Clubs & Schools
- Stay Informed
- Keep checking DEW and SA Health updates for the latest water-quality alerts and guidance. • Share this information with coaches, students, and families proactively