<prompt> Plasma fluoride level expected in a healthy, fasting, long-term resident of a community with a water fluoride level of 1 ppm is approximately?0.01 ppm0.012 ppm0.015 ppm0.019 ppm  <response>: The ionic fluoride is of public health significance. It varies according to the concentration of fluoride in the drinking water. Its plasma concentration is approximately twice as high as that associated with the blood cells. Since plasma fluoride levels are not homeostatically regulated, there is no normal physiologic concentration. Plasma fluoride level expected in a healthy, fasting, long-term resident of a community with a water fluoride level of 1 ppm is approximately 1 μM 0.019 ppm. There is evidence that plasma fluoride levels increase slightly with age. 