Lake Menindee and the Lake Menindee outlet regulator are on Red alert for blue-green algae.
The Murray River at Buronga, Merbein, Curlwaa, Fort Courage and Lake Victoria is on Amber alert for blue-green algae.
The Great Darling Anabranch at the Silver City Highway crossing is on Amber alert for blue-green algae.
There are no alerts for the Darling River.
Cyanobacteria can produce toxins that can pose risk to livestock and cause public health issues for humans.
The only way to tell if algae are harmful is to take a sample and analyse it in a laboratory.
Updates and information about blue-green algae blooms and red level warning areas can be obtained by visiting www.waternsw.com.au/algae
Image: https://pixabay.com/photos/cyanobacteria-cyanophyta-algae-4469840/
