What are these white spots. It’s a common defect called dental fluorosis. Which develops during childhood. And can persist well into adulthood. About 25% of americans have some form of it. It means you had too much fluoride as a child. Before age 8 teeth are still developing under the gum. But excess fluoride in the diet disrupts this process. By hindering the formation of tooth enamel. And making certain spots softer than their surroundings. The result is usually white or brown stains. In severe cases it can leave divots in the teeth. Some fluoride is important for controlling tooth decay. The limit for children under 8 is as follows : 0-6 months: 0.01 milligrams/day ,7-12 months: 0.5 milligrams/day , 1-3 years: 0.7 milligrams/day , 4-8 years: 1.0 milligrams/day . whter and other beverages account for 75% of daily fluoride intake. 1 liter of water fluoridated at 1 part per million, will give you 1 milligram of fluoride. Not sure how much fluoride is I your water. Visit the cdc’s “my water’s fluoride” website to find out.