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Griffith City Council would like to advise a Red Alert warning has been issued for the Blue-Green Algae in Lake Wyangan (North).

This Red Alert warning indicates that the water of Lake Wyangan North is unsuitable for recreational use or primary contact by domestic users and may pose a threat to livestock.

Restricted access to Lake Wyangan North means residents and visitors are advised not to enter the water to undertake recreational activities where they may come into direct contact with the water such as swimming, bathing, boating, water skiing, sailing, kayaking and fishing and are advised to avoid areas where algae is obvious.

Residents and visitors to Lake Wyangan North are further advised not to drink the untreated water or bathe in the water drawn from Lake Wyangan North. Blue-Green Algae may cause gastroenteritis in humans if consumed and may also cause eye and skin irritations. Please note algae cannot be removed by boiling the water.

Livestock owners are advised to restrict access by removing livestock from the foreshores of Lake Wyangan North where surface scum is visible or Blue-Green Algae is suspected and domestic pets should also be kept away from the Lake, as consumption of the water may pose a threat.

Council actively monitors the water quality of Lake Wyangan North for incidence of Blue-Green Algae, undertaking rigorous sampling and monitoring in accordance with National (NHMRC 2008) and our regions Water NSW (Murrumbidgee Region) guidelines. These guidelines ensure, when Blue-Green Algae Red Alert does occur, that appropriate sampling frequency and alerting measures  are put in place, including closure of the affected water body and notification of all water users.

The total biovolume of all blue green algae is just over the total biovolume of all algae, which was 10.4 mm3/L. The Lake will remain closed until two consecutive samples below the 10 mm3/L are recorded. The total biovolume of potentially toxic blue green algae was 2.9 mm3/L.

Regular users, such as the Griffith Boat Club and Griffith Sailing Club, have been notified of the closure.

Warning signs have been erected around Lake Wyangan North to alert users of the restricted access to the Lake. Access to the recreational land such as the picnic area however, will remain open.

Council will continue to monitor the water quality of Lake Wyangan (North), and provide updates to the current Red Alert through our website and through the local media.