Smith Mountain Lake test results show acceptable levels of harmful algal bloom

SMITH MOUNTAIN LAKE, Va. – Testing results of July 13 samples of the Upper Blackwater River portion of Smith Mountain Lake showed acceptable levels of cyanobacteria, also known as harmful algal bloom.

Of the five samples tested, one had detectable levels of microcystin, but the concentration was well below the advisory threshold. All other samples showed toxins were below detectable levels.

The Smith Mountain Lake Association said in order to lift advisories issued for the Blackwater River arm of Smith Mountain Lake, two consecutive samples with results at acceptable levels must be taken at a minimum of 10 days apart, as necessary. The July 13 results are the first set of samples toward lifting the HAB advisory.

Officials say the public should continue to avoid water with surface scum, that appears discolored, water that smells, and water that has dead or dying animals such as fish.

You can view current harmful algal bloom advisory conditions here.

See the full status report from July 21 below.