Monitoring carried out by Environment Southland has detected potentially toxic algae in shallow areas/edges of the mid-Mataura river.
The algae produces toxins that can be harmful to people and animals if swallowed, or through contact with skin.
Environment Southland have added:
Environment Southland’s freshwater & marine science leader Nick Ward says its important people know what to look for and take caution:
“The public need to keep a close eye out for this algae, which appears as a green/brown slime on rocks, or dry brown or black mats at the river’s edge. People and animals (in particular, dogs), should avoid contact with the slime, slime mats, and water in the area, and be mindful until health warnings are removed. Dogs should be kept on leads while walking near the Mataura, and children kept away from its water and riverbanks. Where possible find an alternative water supply for stock. Check stock drinking water regularly for the presence of toxic algal mats.”
If you experience health symptoms after contact with contaminated water, visit a doctor immediately. Animals that consume cyanobacteria should be taken to a vet immediately.
Toxic algae occur naturally but can increase rapidly during warmer periods of the year. The long-term forecast for 2017/2018 is for a long, hot summer, meaning a high likelihood of more toxic algae blooms in Southland waters.
Environment Southland monitors toxic algae monthly at a number of river and lake sites across Southland, and the public will be advised of any changes in water quality that are of public health significance.
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