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​Update on Blue-Green Algae (Cyanobacteria) Found in Lake Wylie 


During their latest assessment of Lake Wylie conducted on September 27, 2021, Charlotte-Mecklenburg Storm Water Services observed active Blue-Green Algae (cyanobacteria) blooms in Boyd’s Cove and in additional areas in Snug Harbor CoveThe attached map illustrates the areas where active cyanobacteria blooms have been observed by Charlotte-Mecklenburg Storm Water Services since assessments began in Lake Wylie in August 2021.  The following safety measures are recommended for both Boyd’s and Snug Harbor Coves:   

  • People and pets should 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. 


All lake users are recommended to look for 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 above. 



To receive future notifications of swimming advisories relating to water quality conditions, register under the new Alert Subscription option entitled “No Swimming Advisory” at or text MECKNOSWIM to 888-777.