but study shows the tap water is now safe to drink. people are still scrambling for the bottled water, though. welcome back to "world business today." let's turn to sarah now. she has been investigating what's being done to bring peace of mind to customers at the grocery stores, the dinner tables and to the people of japan. >> reporter: fallout around the world from japan's announcement that high levels of radiation have been found in milk and raw vegetables. the latest places to keep those items from reaching the marketplace are singapore and hong kong, which is a major importer of japanese food. australia now says it has a holding order in place, and that means that food is held and tested. if it fails inspection, it is sent back. the united states was the first to block vegetable, fruit and milk imports from japan. let's look at the four prefectures effected by the ban. all of these here are effected by the ban.