Update on Blue-Green Algae (Cyanobacteria) Found in Lake Wylie September 15, 2021

Rusty Rozzelle
Mecklenburg County Seal and Storm Water Services Logo

Mecklenburg County, NC – During their latest assessment of Lake Wylie conducted on September 13, 2021, Charlotte-Mecklenburg Storm Water Services observed active Blue-Green Algae (cyanobacteria) blooms at several locations in Boyd’s Cove. Due to the extent of the blooms and their potential for producing toxins, the safety measures below are recommended for all of Boyd’s Cove. In addition, a smaller bloom was detected in proximity to Saranita Lane in Snug Harbor Cove on Lake Wylie near the South Carolina line. The safety measures below may not be necessary for the entirety of Snug Harbor Cove due to the limited nature of this bloom, but it is important to look for the visual signs that a bloom is occurring prior to contact with the water. Visual signs of a bloom may include bright green, blue, discolored, and/or scummy water. If visual signs are observed, follow the safety measures below. The attached map identifies the approximate locations where active cyanobacteria blooms have been detected to date.

  • People and pets do not contact the water or algae.
  • Do not handle cook or eat dead fish that may be present. Avoid fishing in the bloom area.
  • If you come into contact with an algal bloom, wash thoroughly.
  • Use clean water to rinse off pets that may have come into contact with an algal bloom.
  • If you or your child appears ill after being in waters containing an algal bloom, seek medical care immediately. Symptoms include loss of appetite, vomiting, diarrhea, cough, difficulty breathing, sore throat, itchy skin or rash.
  • If your pet appears to stumble, stagger or collapse after being in a pond, lake or river, seek veterinary care immediately.

Charlotte-Mecklenburg Storm Water Services will continue its Lake Wylie assessments until no active cyanobacteria blooms are observed for two (2) consecutive weeks; therefore, an assessment will occur during the week of September 20, 2021 and results will be reported.