Toxic Algae Cyanobacteria
Toxic algae (also known as Cyanobacteria) is naturally present in many New Zealand waterways. It's found in ‘clean’ rivers but can grow when river flows are low and stable, and temperatures are consistently warm. Council routinely monitors its level and informs the community when action needs to be taken.
Low
Most parts of rivers will not have cyanobacteria. Take usual care and be aware of cyanobacteria and risks. Check weekly council monitoring and alert updates.
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Toxic Algae Alerts
Learn about the different monitoring levels and what action to take.
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Frequently Asked Questions
Learn more about toxic algae, why it can be a problem, and what we can do about it.
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Toxic Algae Monitoring
Keep up-to-date with regular monitoring information.