GRAND CANYON NATIONAL PARK, Ariz. -- The National Park Service has issued a drinking water advisory for the Grand Canyon's North Kaibab Trail.
The NPS said the advisory was issued as a precaution after the detection of fecal indicators (E. coli) and is not expected to last more than 48 hours. An update will be provided Saturday.
The advisory includes the Manzanita Rest Area (Roaring Springs) and the Cottonwood Campground in the backcountry.
Day hikers and backpackers are urged to carry their own water or treat park water by filtering it or boiling it for at least three minutes.
The NPS said water should be treated not only before drinking but also before making ice, preparing food, brushing teeth and washing dishes.
Water is safe to drink in all other areas of the park, including the South Rim Village, Desert View, Indian Garden, Phantom Ranch and the North Rim Developed Area.
For more information on treating water in the backcountry, visit www.nps.gov/grca/planyourvisit/safe-water.htm.