Gauteng and NW Province

Blue-green Algae

This is an actual photo of the quality of water we had a year ago. Since then it has improved….. but I’m not sure I want to trust the water even if it changed from green to white. Would you? I would rather harvest rainwater.

Cyanobacteria / blue-green algae occur worldwide especially in calm, nutrient-rich waters. Some species produce toxins that affect animals and humans. People may be exposed to cyanobacterial toxins by drinking or bathing in contaminated water.

Humans are affected with a range of symptoms including skin irritation, stomach cramps, vomiting, nausea, diarrhoea, fever, sore throat, headache, muscle and joint pain, blisters of the mouth and liver damage. Swimmers in water containing cyanobacterial toxins may suffer allergic reactions, eye irritation, rashes, and blisters around the mouth and nose. Animals, birds, and fish can also be poisoned by high levels of toxin-producing cyanobacteria.

Surface scums, where they occur, represent a specific hazard to human health because of their particularly high toxin contact.

 

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