Fluoride in your tap water. Yes, this is a thing. In fact, since it's inception back in the 1940s, community water fluoridation is considered  one of the top public health achievements of the 20th century. Tossing a little fluoride in the drinking water is simply done to help reduce tooth decay. Consider it a back up plan for those who don't have a dental plan.

Of course, you can't have a major achievement without some major bitching. The "bitch" about fluoride in the tap water is the worry about fluoride build-up in your bones. That threat is only realistic after long time exposure to fluoride levels of 4.0 mg/L. The United States Public Health Service recommends a level of 0.7mg/L. So how much fluoride is in Texas's Water, if any?

HealthGrove ranked the states, including the District of Columbia, by percent of people on community water systems that have fluoridated water.