Fluoride is a naturally occurring mineral that can be found in water, soil, and rock. It is also added to some public water supplies in order to help prevent tooth decay. While fluoride is generally safe for human consumption, high levels of fluoride can cause a condition called fluorosis, which can lead to tooth discoloration and other health problems.
There are a few different ways to detect fluoride in water. One common method is to use a fluoride test kit. These kits are available at most hardware stores and home improvement centers. To use a fluoride test kit, simply follow the instructions on the package. The kit will typically contain a test strip that you will dip into the water sample. The test strip will then change color depending on the fluoride concentration in the water.