191223-N-HI746-1016 DIEGO GARCIA, British Indian Ocean Territory (Dec. 23, 2019) - Utilitiesman 1st class Khamla Southaphanh, assigned to Naval Facilities Engineering Command (NAVFAC) Far East Public Works Department (PWD) Detachment Diego Garcia, uses an ultrameter to test the pH of the water at the water treatment facility on Diego Garcia Dec. 23. Southaphanh verifies that the water at the plant is fit for human consumption and assesses the performance of the various water treatment plants on the atoll. U.S. Navy photo by Mass Communication Specialist Seaman Carlos W. Hopper (released)