Goulburn-Murray Water (GMW) is warning the public to avoid direct contact with water in Lake Eppalock after high levels of blue-green algae was detected.
GMW said Lake Eppalock will not be closed to the public, but water users are urged to seek an alternative water supply.
Blue-green algae occurs naturally in bodies of water but contains toxins that are harmful to humans and animals.
Characteristic signs of algae contact are skin rashes or itchiness, or sore eyes, ears and nose.
Anyone who comes into contact with the water should wash the affected skin immediately in clean cold water.
It is not possible to predict how long the algae will remain at high levels, but GMW said it is continuing to monitor the situation.
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