Senior Airman Ryan Smith places a bottled water sample into an incubator July 20, 2012 here. The test is conducted to help grow any potential bacteria which may be found in the water. More than 1.3 million bottles of water are consumed at this installation every month. Smith is the 379th Expeditionary Medical Group bioenvironmental program manager, (U.S. Air Force photo/Senior Airman Bryan Swink)