Today we were learning about Drinking water. Our instructor Kathryn was telling us about the stages that our water goes through to turn it into treated water. The water first goes through a screen so all the bigger items can go away and the only thing that will be left is stuff that is smaller than 3MM. After that it will go to the grit remover to remove all the sand from the untreated water. Then it goes to the sedimentation so all of the sand falls to the ground and separates from the water. After that that the untreated water will go through the clarifier to and then it will go and be disinfected with chlorine so that any bacteria, virus will be removed from the water then they will add fluoride to the water.
Why do you think they add fluoride to the water ?