Harmful algae expands swimming advisories for parts of Lake Anna

by | Aug 20, 2023 | Health & Wellness, Outdoors, Ted Schubel

The State Health Department says the Upper and Middle sections of North Anna Branch of Lake Anna in Louisa County are experiencing harmful algae blooms. Officals say you should avoid contact with this specific area of the lake until algae concentrations return to acceptable levels.

Some harmful algae, called cyanobacteria, can cause skin rash and gastrointestinal illnesses, such as upset stomach, nausea, vomiting and diarrhea.

The area to avoid is outlined here

There’s a swimming advisory in the affected areas of the lake

  • Upper North Anna Branch (advisory issued 8/4/23) – From the upper inundated waters of the North Anna arm of the lake downstream to the Route 522 Bridge.
  • Middle North Anna Branch (issued 8/18/23) – From the Route 522 Bridge, to include Route 719 (Holladay Bridge), to Lumsden Flats at Rose Valley Drive

To lift advisories, there must be two acceptable samples collected at least 10 days apart. The next sampling date is planned for the week of September 19.

Advisories are usually lifted following two consecutive test results with acceptable levels for algal cell counts and/or toxin concentration.

For information:   www.SwimHealthyVA.com.

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