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To report an algal bloom, please call the ranger service on 01259 450 000.
Blue green algae are primative bacteria that occur naturally in inland waters, on the coast and at sea. They have been around for millions of years and are an important part of aquatic ecosystems.
If the water conditions are right, the numbers of blue-green algae can rapidly increase to excessive levels and form visible 'blooms'. This often happens during periods of calm, warm weather.
Blue green algae blooms can vary in appearance depending on which species are present, but common things to look out for are:
Some species of blue green algae can produce toxins. When the algae bloom, the toxins can be produced in potentially dangerous quantities. This means that blue-green algae can cause environmental problems, disrupt drinking water supplies, recreational activities, and pose a risk to livestock, wildlife and human health.
While the toxins have the potential to kill animals, in humans the effects tend to be less severe but the toxins can cause skin rashes, eye rashes, vomiting, diarrhoea, fever, and joint and muscle pain if ingested or if they come into contact with skin.
Not all algal blooms or scum are toxic, but since you can't tell just by looking at the bloom, it is safest to assume they are toxic and avoid contact.
The ranger service will put up warning signs when algal blooms are likely, or if they have been seen.
If you see the signs or, if you spot an algal bloom: