Water Purification Needs for Grand Canyon Backpacking
Whether or not you need a water purification device for backpacking in the Grand Canyon depends on a few factors. For treks within the corridor backcountry use areas during the peak season, there is piped water available 
in a few places along the North Kaibab and Bright Angel Trails; and at Phantom Ranch as well. Be water wise if your backcountry permit itinerary includes ascending or descending South Kaibab Trail, as there is no water available. No matter where or when your planned trip will take you within Grand Canyon, always carry a sufficient quantity of water on the trail and check in with the Backcountry Information Center about water availability.
For those who have gained some Grand Canyon backpacking experience and wish to adventure on to non-corridor trails, packing a water purification device or iodine tablets is still highly recommended. While some veterans of the Grand Canyon backcountry can handle drinking unpurified spring water, the risks of contracting a debilitating water-born illness such as Giardia should be a priority to consider.
If you’re counting on the Colorado River as a source of drinking water, be advised that it can be heavily silt laden on a frequent basis. An expression common with the old-timers of Grand Canyon’s history referred to the Colorado River as, “too thick to drink, too thin to plow.” Many Grand Canyon backpackers prepare for this situation by carrying a lightweight collapsible bucket to let sediment settle at the bottom before purification, or bring some form of water straining device.
