Recreational visitors to Lake Powell are being urged to use caution after harmful cyanotoxins were detected at the mouth of Antelope Canyon, the National Park Service announced.
While recreation on Lake Powell remains open throughout Glen Canyon National Recreation Area in Utah and Arizona, boaters are urged to use caution and avoid unnecessary exposure to the water while boating or fishing.
The cyanotoxins, produced by certain types of blue-green algae, were found in concentrations at the high end of safe exposure levels. Warm, nutrient-rich, and still waters create ideal conditions for the growth of cyanobacteria, which can quickly form toxic algal blooms. These blooms, which can appear as scum or discoloration in shallow, warm water, are commonly found in both Arizona and Utah.
Exposure to cyanotoxins can pose health risks to humans and animals, including nausea, respiratory issues, digestive problems, or even seizures in severe cases.
In addition to avoiding swimming or water sports in scummy areas, park officials are warning visitors to shower after any water contact, keep children and pets away from shoreline scum, and rinse fish with treated water. Boaters should be especially cautious, as activities like skiing or jet-skiing can aerosolize the toxins, increasing the risk of inhalation.
If you or your pet experiences unexplained symptoms after being in or near lake water, officials recommend seeking immediate medical or veterinary attention.
Water quality staff are actively monitoring the situation and conducting additional sampling. Updates will be posted on Glen Canyon National Recreation Area’s website and social media pages, and more information can be found on Glen Canyon’s Lake Powell Water Advisory page.
