BLACKWATER is moving through SA’s River Murray system.
A natural phenomenon, blackwater occurs when organic material, such as leaves and wood from the forest floor and floodplain, are washed into waterways. As its name suggests, blackwater creates a black appearance in the water and a strong smell.
As the organic matter decays, it results in low water oxygen levels which may cause fish to die. Water users may notice darker colour water and dead or distressed fish in parts of the river.
PIRSA Fisheries and Aquaculture Director Policy Sean Sloan said there was no direct threat to the public, but farms along the river should prepare.
“Livestock owners along the Murray are encouraged to top up tanks while the water is still fresh and to not pump until the blackwater passes,” he said.
“While blackwater is acceptable for animals to drink, they will naturally prefer cleaner water.”
Mr Sloan said blackwater did not increase the risk of infection when swimming, but people should take additional care where visibility is decreased as there is a higher risk of physical injury from submerged objects.
“While some people may be concerned about blackwater, particularly when seeing deceased or distressed fish, it is important to remember that this natural event does contribute to major improvements in the long term health of the River Murray.”
- Report large number of dead fish and aquatic animals to Fishwatch 1800065522.