Red alert warnings issued for popular waterways
RED Alerts have been issued at two popular locations warning of dangerous water quality.
A Red Alert level remains in place at Lake Ainsworth after first being issued more than three weeks ago on January 16.
Testing by Ballina Shire Council's Environmental Health Officers from Monday February 4 indicated volumes of blue green algae had overall decreased, however, dominate and potentially toxic microcystis aeruginosa species of blue-green algae are still present along with thick slicks and scums.
Based on these results, the Red Alert remains in place and the council recommends no swimming or other primary recreational activities at the lake.
Warning signs are in place at key recreational areas and these will remain in place while high levels of blue-green algae are present.
A blue-green algae Red Alert has also been issued for Toonumbar Dam after monitoring by WaterNSW.
The water authority said a Red Alert level warning indicates that people should not undertake recreational activities where they may come into direct contact with the water such as swimming, as well as domestic uses including showering and washing. Contact with the water may also pose a threat to livestock and pets.
The species of blue-green algae identified are potentially toxic and may cause gastroenteritis in humans if consumed and skin and eye irritations after contact. Boiling the water does not remove algal toxins.
People are advised not to enter the water, drink untreated water or bathe in water drawn from the lake while this red alert level warning is in place. Town water supplies remain unaffected and safe to drink.
Livestock owners are reminded to continue to check stock water supplies for blue-green algae and to remove stock from foreshores where surface scum is visible or blue-green algae are suspected.
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 should not eat mussels or crayfish from Red Alert warning areas. Any fish caught should be cleaned and washed thoroughly in uncontaminated water and any internal organs disposed of before consumption.
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.
It is not possible to predict how long the algae will remain at high levels. Regular monitoring will continue, and the alert will be lifted as soon as the high levels of algae dissipate.
People who believe they may have been affected by blue-green algae are advised to seek medical advice.
Updates about blue-green algae blooms and red level warning areas can be obtained by calling 1800 999 457 or visiting - waternsw.com.au/water-quality/algae.