Eco Bites

Toxic Algae in Rietvlei

What are blue-green algae? • Blue-green algae are natural inhabitants of many inland waters, estuaries and the sea. In still waters such as lakes, ponds and reservoirs, these algae may multiply sufficiently in summer months to discolour the water, so that it appears green, blue-green or greenish brown.    Are they harmful? • Sometimes these algae produce toxins which can be harmful to man and animals • High concentrations of the algal blooms float and form a thick blue-green scum    Who is at risk? • Recreational water users and livestock farmers and anyone else coming into direct contact with infected water    How do blue-green algae affect me? Blue-green algae toxins may cause: • Skin rashes • Eye irritation • Vomiting • Fever • Muscle and joint pain • Possible long-term liver damage    What must I do when I come into contact with blue-green algae? • Wash immediately with clean water • If symptoms persist, consult your doctor • Report the incident to the authorities in your region    First aid treatment • Drink activated carbon charcoal tablets • Treat symptomatically    What is important to know about blue-green algae? • Blooms flourish in warmer summer waters, and in many areas die down during winter time • Plant nutrients promote the growth of these algae • Toxins produced can survive high temperatures • Toxicity fluctuates constantly. It is possible for algae to be toxic one day, and not the next     To be safe, avoid contact with the scum and the water close to it.

Use water at own discretion and at own risk!!!!