New Blue-green algae red alerts are in place for the Murray River at Fort Courage, Tooleybuc and Euston Weir.
A red alert remains in place on the Murray River from Merbein to Fort Courage.
The red alert for Mildura has been lifted following two consecutive results from Lower Murray Water.
A red alert has also been issued for the Niemur River at Barham – Moulamein Rd, following results from ad hoc sampling last week.
Blooms reported for the Darling River at Menindee and Pooncarie were sampled routinely and low numbers of cyanobacteria were recorded.