NEW YORK (Reuters) -- PepsiCo Inc. will spell out that its Aquafina bottled water is made with tap water, a concession to the growing environmental and political opposition to the bottled water industry. According to Corporate Accountability International, a U.S. watchdog group, the world's No. 2 beverage company will include the words "Public Water Source" on Aquafina labels.

Pepsi's Aquafina and Coca-Cola Co's Dasani are both made from purified water sourced from public reservoirs, as opposed to Danone's Evian or Nestle's Poland Spring, so-called "spring waters," shipped from specific locations the companies say have notably clean water.