Update

GEORGE NEWS - Island lake, that was closed for recreational activities in the first week in April due to blue-green algal bloom, remains closed.

Dr Sandra Taljaard, park manager for Wilderness Park, said on Monday 11 April that it had been determined that the cyanobacteria detected were a toxin-producing variant, reinforcing the decision to close Island Lake for all recreational activities.

"Due to the dynamic nature of natural and chemical processes, it is not possible to provide a definitive date when it will be opened," she said. 

"Additional water samples have been collected and sent for analysis. As soon as the results are available and indicate that it is safe for recreational use, Island lake will be opened with immediate effect. We share the enthusiasm of residents and visitors wanting to enjoy the lake with the peace of mind that it is safe, especially as we approach the Easter long weekend."

Taljaard said additional water samples sent for analysis showed elevated nitrate, nitrite, ammonium and phosphate levels, which are associated with algal blooms. 

According to results received and analysed by SANParks aquatic scientists on Saturday 9 April, levels and ratios of nitrates, ammonium and phosphates indicated that the cyanobacteria were still active, despite visual observations in the main lake suggesting otherwise.

"The ammonium levels are substantially higher when compared with the long-term average from 1998. The algal bloom in the Duiwe River section of Island Lake is still visible and active," said Taljaard.

Touw, Swartvlei open The Touw River and Swartvlei Estuary remain open for recreational activities.

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