Blue-green algae

Blue-green algal red alert issued for the Darling River at Burtundy and Ellerslie – 24 October 2023

Blue-green algae Report – 17 March 2023

WaterNSW has released a blue-green algae report for the Murray River, Darling River, Menindee Lakes and Darling Anabranch.

Summary for Wentworth Shire:

RED ALERT

Murray River at Lock 9 & Fort Courage

Darling River at the Great Darling Anabranch – Silver City Highway crossing

AMBER ALERT

Murray River at Buronga & Curlwaa

Darling River at Tolarno, Pooncarie, Burtundy, Ellerslie and Tapio.

Read the full blue-green algae report (17 March 2023):


Alert Definitions for Recreational Waters

Alert Definitions as specified in The National Health and Medical Research Council (NHMRC) Guidelines for Managing Risks in Recreational Water 2008. The use of these guidelines is endorsed by the Scientific Subcommittee of the NSW Algal Advisory Group.


RED ALERT
These alert levels represent ‘bloom’ conditions. Water will appear green or discoloured and clumps or scums could be visible. It can also give off a strong musty or organic odour. Algae may be toxic to humans and animals. Contact with or use of water from red alert areas should be avoided due to the risk of eye and skin irritation. Drinking untreated or boiled water from these supplies can cause stomach upsets. Alternative water supplies should be sought or activated carbon treatment employed to remove toxins. People should not fish when an algal scum is present. Owners should keep dogs away from high alert areas and provide alternative watering points for stock.


AMBER ALERT
Blue-green algae may be multiplying, and the water may have a green tinge and musty or organic taste and odour. The water should be considered as unsuitable for potable use and alternative supplies or prior treatment of raw water for domestic purposes should be considered. The water may also be unsuitable for stock watering. Generally suitable for water sports, however people are advised to exercise caution in these areas, as blue-green algal concentrations can rise to red alert levels quickly under warm, calm weather conditions.


GREEN ALERT
Blue-green algae occur naturally at low numbers. At these concentrations, algae would not normally be visible, however some species may affect taste and odour of water even at
low numbers and does not pose any problems for recreational, stock or household use.

Blue-green algae Report

WaterNSW has released a blue-green algae report for the Murray River, Darling River, Menindee Lakes and Darling Anabranch.

Summary for Wentworth Shire:

RED ALERT

Murray River at Lock 9 (Lower Murray Water)

Darling River at Pooncarie as well as the Great Darling Anabranch at the Silver City Highway crossing

AMBER ALERT

Murray River at Curlwaa

Darling River at Tolarno, Burtundy, Ellerslie and Tapio.

Read the full blue-green algae report (9 March 2023):


Alert Definitions for Recreational Waters

Alert Definitions as specified in The National Health and Medical Research Council (NHMRC) Guidelines for Managing Risks in Recreational Water 2008. The use of these guidelines is endorsed by the Scientific Subcommittee of the NSW Algal Advisory Group.


RED ALERT
These alert levels represent ‘bloom’ conditions. Water will appear green or discoloured and clumps or scums could be visible. It can also give off a strong musty or organic odour. Algae may be toxic to humans and animals. Contact with or use of water from red alert areas should be avoided due to the risk of eye and skin irritation. Drinking untreated or boiled water from these supplies can cause stomach upsets. Alternative water supplies should be sought or activated carbon treatment employed to remove toxins. People should not fish when an algal scum is present. Owners should keep dogs away from high alert areas and provide alternative watering points for stock.


AMBER ALERT
Blue-green algae may be multiplying, and the water may have a green tinge and musty or organic taste and odour. The water should be considered as unsuitable for potable use and alternative supplies or prior treatment of raw water for domestic purposes should be considered. The water may also be unsuitable for stock watering. Generally suitable for water sports, however people are advised to exercise caution in these areas, as blue-green algal concentrations can rise to red alert levels quickly under warm, calm weather conditions.


GREEN ALERT
Blue-green algae occur naturally at low numbers. At these concentrations, algae would not normally be visible, however some species may affect taste and odour of water even at
low numbers and does not pose any problems for recreational, stock or household use.

Blue-green algae Report

WaterNSW has released a blue-green algae report for the Murray River, Darling River, Menindee Lakes and Darling Anabranch.

Summary for Wentworth Shire:

RED ALERT

Darling River at Pooncarie, Burtundy & Ellerslie

Great Darling Anabranch at the Silver City Highway crossing

AMBER ALERT

Murray River at Curlwaa

Read the full blue-green algae report (24 February 2023):


Alert Definitions for Recreational Waters

Alert Definitions as specified in The National Health and Medical Research Council (NHMRC) Guidelines for Managing Risks in Recreational Water 2008. The use of these guidelines is endorsed by the Scientific Subcommittee of the NSW Algal Advisory Group.


RED ALERT
These alert levels represent ‘bloom’ conditions. Water will appear green or discoloured and clumps or scums could be visible. It can also give off a strong musty or organic odour. Algae may be toxic to humans and animals. Contact with or use of water from red alert areas should be avoided due to the risk of eye and skin irritation. Drinking untreated or boiled water from these supplies can cause stomach upsets. Alternative water supplies should be sought or activated carbon treatment employed to remove toxins. People should not fish when an algal scum is present. Owners should keep dogs away from high alert areas and provide alternative watering points for stock.


AMBER ALERT
Blue-green algae may be multiplying, and the water may have a green tinge and musty or organic taste and odour. The water should be considered as unsuitable for potable use and alternative supplies or prior treatment of raw water for domestic purposes should be considered. The water may also be unsuitable for stock watering. Generally suitable for water sports, however people are advised to exercise caution in these areas, as blue-green algal concentrations can rise to red alert levels quickly under warm, calm weather conditions.


GREEN ALERT
Blue-green algae occur naturally at low numbers. At these concentrations, algae would not normally be visible, however some species may affect taste and odour of water even at
low numbers and does not pose any problems for recreational, stock or household use.

Blue-green algae Report

WaterNSW has released a blue-green algae report for the Murray River, Darling River and Menindee Lakes.

Summary for Wentworth Shire:

RED ALERT

Darling River at Pooncarie, Burtundy & Ellerslie

Darling Anabranch at the Silver City Highway crossing

AMBER ALERT

Murray River at Curlwaa

Read the full blue-green algae report (17 February 2023):


Alert Definitions for Recreational Waters

Alert Definitions as specified in The National Health and Medical Research Council (NHMRC) Guidelines for Managing Risks in Recreational Water 2008. The use of these guidelines is endorsed by the Scientific Subcommittee of the NSW Algal Advisory Group.


RED ALERT
These alert levels represent ‘bloom’ conditions. Water will appear green or discoloured and clumps or scums could be visible. It can also give off a strong musty or organic odour. Algae may be toxic to humans and animals. Contact with or use of water from red alert areas should be avoided due to the risk of eye and skin irritation. Drinking untreated or boiled water from these supplies can cause stomach upsets. Alternative water supplies should be sought or activated carbon treatment employed to remove toxins. People should not fish when an algal scum is present. Owners should keep dogs away from high alert areas and provide alternative watering points for stock.


AMBER ALERT
Blue-green algae may be multiplying, and the water may have a green tinge and musty or organic taste and odour. The water should be considered as unsuitable for potable use and alternative supplies or prior treatment of raw water for domestic purposes should be considered. The water may also be unsuitable for stock watering. Generally suitable for water sports, however people are advised to exercise caution in these areas, as blue-green algal concentrations can rise to red alert levels quickly under warm, calm weather conditions.


GREEN ALERT
Blue-green algae occur naturally at low numbers. At these concentrations, algae would not normally be visible, however some species may affect taste and odour of water even at
low numbers and does not pose any problems for recreational, stock or household use.

Blue-green algae Report

WaterNSW has released a blue-green algae report for the Murray River, Darling River and Menindee Lakes.

Summary for Wentworth Shire:

RED ALERT

Darling River at Pooncarie, Burtundy & Ellerslie

Darling Anabranch at the Silver City Highway crossing

AMBER ALERT

Murray River at Curlwaa

Read the full blue-green algae report (10 February 2023):

Read the media release (13 February 2023):


Alert Definitions for Recreational Waters

Alert Definitions as specified in The National Health and Medical Research Council (NHMRC) Guidelines for Managing Risks in Recreational Water 2008. The use of these guidelines is endorsed by the Scientific Subcommittee of the NSW Algal Advisory Group.


RED ALERT
These alert levels represent ‘bloom’ conditions. Water will appear green or discoloured and clumps or scums could be visible. It can also give off a strong musty or organic odour. Algae may be toxic to humans and animals. Contact with or use of water from red alert areas should be avoided due to the risk of eye and skin irritation. Drinking untreated or boiled water from these supplies can cause stomach upsets. Alternative water supplies should be sought or activated carbon treatment employed to remove toxins. People should not fish when an algal scum is present. Owners should keep dogs away from high alert areas and provide alternative watering points for stock.


AMBER ALERT
Blue-green algae may be multiplying, and the water may have a green tinge and musty or organic taste and odour. The water should be considered as unsuitable for potable use and alternative supplies or prior treatment of raw water for domestic purposes should be considered. The water may also be unsuitable for stock watering. Generally suitable for water sports, however people are advised to exercise caution in these areas, as blue-green algal concentrations can rise to red alert levels quickly under warm, calm weather conditions.


GREEN ALERT
Blue-green algae occur naturally at low numbers. At these concentrations, algae would not normally be visible, however some species may affect taste and odour of water even at
low numbers and does not pose any problems for recreational, stock or household use.

Algae alerts remain for Murray River

Blue-green algae red alerts remain in place along the lower Murray River at the following locations: Euston weir, Mt Dispersion, Red Cliffs/Colignan, Buronga, Merbein, Curlwaa, Wentworth and Fort Courage.

The latest results from Water NSW and Lower Murray Water indicate there’s been a modest reduction in cell growth over the past 10 days where Dolichospermum and Chrysosporum spp. dominate the algal assemblage.

Blooms comprising predominantly Nostocales (e.g. D. plantonicum) tend to occur in mid-Autumn, and in some systems can be followed by Microcystis blooms.

A successional shift to densities of colony forming species, such as Microcystis is unlikely at this point.

The cyanobacteria population in the lower Murray River contains <5% species from the Orders, Chroococcales (Microcystis) or Oscillatoriales, and water temperatures are within the low risk range (<16 DegC).

The Red Alert previously issued for the Neimur River has been lifted.

Fort Courage Blue-green algae alert

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.