The National Capital Authority (NCA) wishes to advise the community and Lake Burley Griffin (the Lake) recreational users that the Lake is still closed to swimming and full emersion activities.
The Lake was closed from Saturday, 3 September, as a precautionary measure as advised by the ACT Environmental Protection Agency due to potential contamination resulting from possible overflow at the Queanbeyan Sewage Treatment Plant.
The NCA undertook water quality samplings at key beach sites on Monday and Wednesday this week to determine the extent of any contamination. The results confirmed there were elevated bacteria levels in the sample areas. Under the Guidelines for Recreational Water Quality, two consecutive negative samples must be obtained before reopening the Lake. Water quality samplings will be undertaken again next week.
The elevated bacteria levels could be attributed to several sources, including high flows in urban storm-water and domestic and rural animal waste runoff.
The risk to human health is low due to a high dilution rate from recent rains, but precautionary measures are being undertaken by the NCA. Further measures, including washing your skin with water and soap after contact is encouraged.
WHAT: Lake Burley Griffin closed to primary contact
WHERE: All of Lake Burley Griffin
WHEN: Until further notice