FLAGSTAFF, Ariz. » Disposable plastic water bottles in shops, vending machines, hotels and grocery stores at Grand Canyon National Park will disappear early next year under a plan by park officials to ban the sale of them.

But first they’ll have to demonstrate they’ve met guidelines issued late Wednesday by the National Park Service that require a review of water availability, health and safety, cost and benefits, and get the approval of the regional director.

Grand Canyon spokeswoman Shannan Marcak said Thursday that park officials believe it already is positioned to comply with the guidelines.

"We need to fully review it, and it takes a little time to figure out if we have all those things covered," she said.

Park Service Director Jon Jarvis nixed a bottle ban at Grand Canyon late last year just weeks before it was to be implemented and said the agency would develop a national policy.

Zion (in Utah) and Hawaii Volcanoes national parks have instituted bans similar to the one proposed at the Grand Canyon. The Park Service said those parks also would have to show in writing that the new guidelines are met and evaluate the bans annually.