Senior Airman Matthew Ketterling, 379th Expeditionary Medical Operations Squadron bioenvironmental engineering journeyman, pours a Chlorine Reagent into a water sample June 16, 2021, at Al Udeid Air Base, Qatar. The sample was then put into a colorimeter which reads the color of the water to identify how much chlorine is present. These were done to ensure the water is meeting the standards necessary for potable water.

---

Size: 1935px × 1292px
Photo credit: © Operation 2021 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 379th, airman, civil, engineering, expeditionary, medical, operations, readyaf, water