Algae alerts

24 DECEMBER 2025

Blue-green algae Red Alert lifted for Fitzroy Falls Lake

WaterNSW has lifted the blue-green algae Red Alert warning issued on 17 December 2025 for Fitzroy Falls Lake, located about 20 kilometres south-east of Bowral. Fitzroy Falls Lake is now on Amber Alert.

19 DECEMBER 2025

Blue-green algae Red Alert for Yanga Lake

WaterNSW has issued a precautionary Red Alert warning for high levels of potentially toxic blue-green algae for Yanga Lake.

17 DECEMBER 2025

Precautionary algal alert issued for Darling River at Louth

WaterNSW has issued precautionary advice to people in the Louth area to avoid contact with the Darling-Baaka River due to the likelihood of high levels of potentially toxic blue-green algae.

17 DECEMBER 2025

Blue-green algae red alert for Fitzroy Falls Lake

WaterNSW has issued a red alert warning for high levels of potentially toxic blue-green algae for Fitzroy Falls Lake located about 20 kilometres south-east of Bowral.

16 DECEMBER 2025

Blue-green algae red alert for the Namoi River at Walgett

WaterNSW has issued a red Alert warning for high levels of potentially toxic blue-green algae for the Namoi River at Walgett.

3 DECEMBER 2025

Blue-green algae red alert for Malpas Dam

WaterNSW has issued a red alert warning for high levels of potentially toxic blue-green algae for Malpas Dam located south-east of Guyra and to the north of Armidale.

25 NOVEMBER 2025

Blue-green algae red alert for Lake Brewster

WaterNSW has issued a red alert warning for high levels of potentially toxic blue-green algae for Lake Brewster Regulator C.

20 NOVEMBER 2025

Blue-green algae red alert issued for Chaffey Dam

WaterNSW has issued a red alert warning for high levels of potentially toxic blue-green algae for Chaffey Dam located approximately 43 kilometres south-east of Tamworth.

13 NOVEMBER 2025

Blue-green algae red alert lifted for Burrendong Dam

WaterNSW has lifted the blue-green algae red alert warning issued 27 October for Burrendong Dam, located approximately 30 km south-east of Wellington in Central West NSW. Burrendong Dam is now subject to no alert.

10 NOVEMBER 2025

Algal red alert lifted for Chaffey Dam & Peel River downstream

WaterNSW has lifted the blue-green algae red alert warning issued on 5 and 16 September 2025 for Chaffey Dam and the Peel River downstream the dam. Both Chaffey Dam and the downstream site are now on amber alert.

WaterNSW acknowledges the traditional custodians of the lands and waters on which we work and pay our respects to all elders past, present and emerging. Learn more