The Community and Public Health division of the Canterbury District Health Board has lifted its algal bloom health warning issued for the Waimakariri River at Reids reserve, the Waipara River at Stringers Bridge and Teviotdale, and Ashburton River at State Highway 1.
Recent river bed surveys have shown that the quantity of potentially toxic blue-green algae (benthic cyanobacteria) in these rivers has decreased below levels that are of concern to public health.
Canterbury Medical Officer of Health Dr Cheryl Brunton says Environment Canterbury's sampling of Canterbury's rivers will resume next summer.
Warnings to remain out of waterways due to ongoing algal blooms are still in place at:
The public will be notified when the above sites have been cleared by Environment Canterbury monitoring.
Facts about cyanobateria:
For further information visit http://ecan.govt.nz/services/online-services/monitoring/swimming-water-quality/Pages/river-warnings.aspx
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