Senior Airman Alexander Delfs, 436th Aerospace Medicine Squadron bioenvironmental engineering journeyman, examines water chemistry test results on a colorimeter Nov. 16, 2016, at an aircraft watering point on Dover Air Force Base, Del. Water testers are able to monitor multiple chemical concentrations with a colorimeter, including pH, chlorine and fluoride. ( Air Force photo by Senior Airman Aaron J. Jenne)

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Keywords: 436th, aerospace, air, airlift, amds, aw, base, bioenvironmental, chemistry, dover, engineering, force, group, mdg, medical, medicine, purity, quality, squadron, testing, water, wing