The high alert algae warning issued for Ben Chifley Dam has been downgraded, after a decline in blue-green algae.
Monitoring conducted by Bathurst Regional Council has shown that concentrations of blue-green algae have declined, prompting the lifting of the high level alert.
However, the dam remains close to all recreational activities.
Bathurst Regional Council closed the dam in early March, with the blue-green algae likely to cause gastroenteritis in humans if consumed, and skin and eye irritations after contact.
The dam closed a week after the temporary Bathurst Aqua Park chose to close a month earlier than planned, citing low water levels and poor water quality.
Updates about blue-green algae blooms and red level warning areas can be obtained by calling 1800 999 457 or visiting - http://www.waternsw.com.au/water-quality/algae.
The dam's current water level is 43 per cent as of May 21, 2019, with over 12,900 megalitres in storage. This is a reduction in storage of 12 megalitres, or 6 millimetres, with the average daily drop being less than 1 millimetres per day.
The lowest dam level since the raising of the dam was 41 per cent in June, 2003.
For more information on the current water level at Ben Chifley Dam, visit the Bathurst Regional Council website at www.bathurst.nsw.gov.au.
What is blue-green algae?
Blue-green algae occur naturally and can reproduce quickly in favourable conditions where there is still or slow-flowing water, abundant sunlight and sufficient levels of nutrients.
Blue-green algae usually appear as green paint-like scums on the water, near the edges, or as greenish clumps throughout the water. It makes the water appear dirty, green or discoloured and generally has a strong musty or earthy odour.
People who believe they may have been affected by blue-green algae are advised to seek medical advice.