NBDHE Review Questions: Quiz 121 February 6, 2016 by Hassan Shah A 5-year-old patient who lives in an area where the fluoride content of the drinking water averages 0.75 ppm. should be supplemented with how much fluoride per day? A. 0 mg. B. 0.25 mg. C. 0.50 mg. D. 1.00 mg. Δ