Reverse osmosis (RO) filters are known for their exceptional ability to remove a wide range of impurities from water. These filters use a semipermeable membrane that allows water molecules to pass through while rejecting dissolved solids, bacteria, viruses, and other contaminants. Reverse osmosis filters are effective at removing minerals, heavy metals, fluoride, and even some radioactive substances. However, they can be slower than other types of filters and may also waste a significant amount of water during the purification process.