The detection of blue-green algae in the Bray Park Weir has prompted Water New South Wales to issue a red alert for the area, as well as watering holes of the Tweed and Oxley Rivers.

The species of algae has been identified as potentially toxic, and may cause gastroenteritis if consumed as well as irritation to skin and eyes upon contact.

In a media release, Water New South Wales said “water users in the area should apply a high level of caution and consider alternate water supplies for stock and domestic purposes.”