As of 22 September 2020 there is a GREEN Level Alert currently in place for Chifley Dam. This means that water related recreational activities are now allowed on the Chifley Dam.
Note: This is not an image of the current algae level at Chifley Dam.
Blue Green Algae is a naturally occurring organism often found in Council's main water storage Chifley Dam.
It is usually visible in the form of floating green particles in the water.
Blue green algae are first detected in the water at low amounts, possibly signalling the early stages of the development of a bloom. At these concentrations, the blue-green algae do not pose a threat to recreational, stock or domestic use.
Low numbers of algae are not a hazard. However, under appropriate weather conditions the algae cells accumulate in certain areas, forced to one shoreline of the dam by prevailing winds, they form colonies turning the water bright green. Warm temperatures and high nutrient levels cause the algae levels to bloom to high numbers, rafts of scum can turn various shades of blue or grey... more.
For further information regarding Blue Green Algae please refer to Water NSW.
There is also an Algae Information telephone number 1800 999 457.
What are the Alert level definitions (From Water NSW)
These alert levels represent 'bloom' conditions. The water will appear green and may have strong, musty or organically polluted odours. Blue-green algae may be visible as clumps or as scums. The 'blooms' should be considered to be toxic to humans and animals, and the water should not be used for potable water supply (without prior treatment), stock watering, or for recreation.
Blue-green algae may be multiplying in numbers. 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. The water remains suitable for recreational use.
Blue-green algae are first detected in the water at low amounts, possibly signalling the early stages of the development of a bloom. At these concentrations, the blue-green algae do not pose a threat to recreational, stock or domestic use.