The Diplomat: Pakistan and Iran have always had historical claims over the water resources of Afghanistan. These claims have always been rejected by Afghanistan. The chaotic politics of water between Afghanistan and its neighbors has a long history, due to the lack of water-sharing agreements between them. Despite sharing 90 percent of its water resources with neighbors, Afghanistan has only one bilateral water treaty, with Iran. Signed in 1973, according to the agreement, Iran should receive 850 million cubic meters of water annually from the Helmand River basin. However, Afghan officials believe the treaty has been not fully implemented from the Iranian side. Iran has been receiving 70 percent more than the amount of water initially agreed upon in 1973. Furthermore, without consulting Afghanistan, Iran has built infrastructure on the water flowing from Afghanistan. Click here to read more (external link).