Around the world, more than 780 million people live without ready access to clean, safe drinking water. For the 85% of the world's population that lives in the driest half of the planet, existing resources are becoming increasingly scarce. To raise awareness about issues affecting water and peoples' access to it, the United Nations has designated March 22 as World Water Day. Explore and share your own World Water Day photos through the #worldwaterday hashtag, and check out some of these organizations working to bring clean water to those around the world: @charitywater, @wateraid, @water, @dropinthebucket, @communitywatersolutions, @waterislife, @peoplewater and @hurley_h2o. Photo by @wateraid.