Harmful Algae Bloom Observed in a Cove on Lake Norman

Published on June 13, 2025

FOR IMMEDIATE RELEASE 

Contact: Olivia Edwards
Olivia.Edwards@MeckNC.gov

Mecklenburg County, N.C. - Active Harmful Algae Bloom (HAB) has been found in a cove on Lake Norman (see map below). Residents are advised to avoid this area of the lake until the bloom is no longer present.

The bloom was observed by staff with Charlotte-Mecklenburg Storm Water Services in response to a report of bright green and bluish water with a surface scum in a cove. Although most algal blooms are not harmful, some species of algae called cyanobacteria can produce toxins that have been linked to severe illness in humans and animals if ingested. The algae found in this bloom has been confirmed as cyanobacteria, and, therefore, it can produce toxins. 

You cannot tell whether a bloom is harmful just by looking at it, so it is best to avoid the following activities around possible algal blooms:

  • Swimming, boating, kayaking, fishing, jet-skiing, water-skiing, or wading through the water
  • Touching or handling mats of algae
  • Ingesting the water
  • Using the water for washing of irrigation
  • Pets and children are at a higher risk of exposure so keep them away from water that appears discolored or scummy

If you accidentally come in contact with a harmful algae bloom, take the following actions:

  • Wash thoroughly
  • Immediately seek veterinary care if your pet appears to stumble, stagger, collapse or vomit uncontrollably after being in contact with the water
  • Immediately seek medical care if a child or adult appears ill after being in contact with the water

Staff with Charlotte-Mecklenburg Storm Water Services will continue to survey the area until the bloom is no longer present at which time the public will be notified.

If you see a bloom, please make sure to report it so staff can investigate:

  • In North Carolina, please report to NCDEQ at Algae.NC.gov.
  • In South Carolina, please report to SCDES by calling (803)-898-8374.

To receive notifications of Lake Advisories in Mecklenburg County, text MECKNOSWIM to 888-777.

Approximate Location of Harmful Algae Blooms (HABs) is outlined in “Red” Below

Map of HAB on Lake Norman

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