Overview

• National Park Service sampling on July 2 detected cyanotoxin concentrations at the high end of safe exposure levels in the mouth of Antelope Canyon.
• Recreation areas across the Glen Canyon National Recreation Area remain open under the advisory with ongoing water quality monitoring.
• The advisory directs visitors to avoid contact with visible algae, refrain from boating in scummy water, and thoroughly clean boats and gear after use.
• Rising water temperatures and nutrient runoff in Western reservoirs create ideal conditions for blue-green algae to form harmful blooms.
• The Centers for Disease Control and Prevention warns that cyanotoxin exposure can cause symptoms ranging from rashes and headaches to liver damage and seizures.