News

Algal Bloom

Published Tue 22 Jul 2025

Updated 10/9/2025

We have been advised that the Harmful Algal Bloom has reached the Port River.

Please also be aware of dogs and potentially contaminated seafood on the beaches.

Rowing South Australia has received an update from the Environment Protection Authority (EPA) regarding the developing algal bloom in South Australian waters. We encourage members to be alert but not alarmed. SA Health is leading the public health response, and we will continue to monitor their advice closely. The Department for Environment and Water (DEW) is currently conducting water sampling. DEW will continue regular monitoring as the situation evolves.

As of 2 July 2025, Rowing SA has been advised that the West Lakes lake and regatta course remain open and safe for recreational activities involving rowing. The algal species identified is Karenia mikimotoi, which does not cause long-term harmful effects in humans. However, exposure to discoloured or foamy water may result in short-term symptoms, including skin or eye irritation and respiratory issues such as coughing or shortness of breath.

The following update guidance has been issued as of 10/9/2025:

  • If water appears discoloured or foamy, treat it as a potential irritant—even though rowing is an on-water sport, accidental contact or splash exposure is possible. Consider modifying sessions or locations until conditions improve.
  • Encourage rowers to minimise direct contact with the water (no dipping hands or faces).
  • Have first-aid supplies available, including water for rinsing eyes and skin.
  • When 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.
  • Individuals with asthma should carry their Ventolin and have a personal management plan in place. These individuals are at increased risk of irritation.
  • In the event of a capsize, the rower should shower or rinse skin and eyes as soon as possible. If irritation persists, seek medical help.

Please familiarise yourself with the Algal Bloom and keep updated – by clicking the link to their website https://www.algalbloom.sa.gov.au/learn-about-algal-bloom.


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