Authorities are assuring residents Lake Ainsworth is safe despite the discovery of blue-green algae.
While high levels of the algae can be harmful to humans, the Regional Algal Coordinating Committee says the levels at the Lennox Head lake are not concerning.
However swimmers are reminded to remain vigilant and avoid contact with any blooms.
Blue-green algae blooms can vary from small green floating dots to general discoloration of the water and have a strong musty or earthy odour.
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