Reverse Osmosis Water Purifiers can effectively remove fluoride, nitrates, nitrites, pesticides, dissolved solids and most all toxins including heavy metals.
With reverse osmosis, water gets pushed through a semi-permeable membrane, pulling out pollutants and leaving pure water. The contaminates get sent down the drain.
For those who have very problematic water, RO or Reverse Osmosis will remove up to 99% of the contaminates. If you wish to remove fluoride a reverse osmosis unit along with a deionizing system is necessary to effectively remove any fluoride the reverse osmosis system does not catch.
Reverse Osmosis doesn't use electricity or chemicals and is highly effective. When used with other filters you can have 99.9% pure water. Remember a Reverse Osmosis will remove all minerals. A re-mineralizing filter is an option.