Bacterial levels in water samples taken at Princess Cove and North Arizona Telephone Cove on Lake Mohave exceeded local, state and National Park Service standards for recreational activity.
Park biologists routinely sample water quality at the park’s swim beaches to help reduce the risk of waterborne diseases. Visitors should avoid contact with these waters, until further notice. Biologists are re-sampling the water daily, and once levels return to acceptable levels, the advisory will be lifted.
Increases in bacterial levels like this are often caused when people dump RV or vessel sewage tanks in the water. If a visitor sees or suspects illegal dumping, they should call 911 immediately. Free dump stations are available at all park campgrounds.
For more information on fecal coliform, visit the Environmental Protection Agency website at https://archive.epa.gov/water/archive/web/html/vms511.html.
For more information on enterococci, visit the Environmental Protection Agency website at https://www.epa.gov/national-aquatic-resource-surveys/indicators-enterococci.