Get the Facts: Bond Lake Water Quality

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August 13, 2019

Media reports published this morning claim that Cary's Bond Lake contains toxic algae. These reports are inaccurate. Recent testing by the North Carolina Division of Water quality indicated no toxic algae in Bond Lake. 

Statement from DENR: 

"A cyanobacterial bloom was observed in Bond Lake on May 27, 2019.The bloom was observable as bright green clumps of algae along the shoreline and a green discoloration throughout the waterbody. Algal analysis showed that the algae present was a blue-green alga known to be capable of producing toxins, however toxin testing found toxins were not present at the time of sampling,” said Leigh Stevenson, algal ecologist with NCDENR. “Signs were posted around the lake warning the public of the possible risk to people and pets and remained onsite until the bloom dissipated. Bond Lake was resampled for blue-green algae on June 13. No visual indicators of an algal bloom were observed at the time of sampling and algal analysis found cyanobacteria were no longer present.Based on these results, it was determined that there was no longer a significant risk to human and animal health from blue-green algae at Bond Lake and signs were removed. If Bond Lake exhibits visual indications of an active blue-green bloom the lake will be retested by NCDEQ staff.”

Citizens should note Bond Lake’s classification is for recreational boating and does not allow for contact activities, such as swimming by dogs or people. Learn more.