RO systems act like super filters, removing dissolved solids (salts, minerals, metals), microscopic impurities (bacteria, viruses), and organic chemicals (pesticides, chlorine). They tackle things like lead, arsenic, and fluoride with up to 99% efficiency. However, they might not completely remove some very small molecules and some bacterial toxins. While effective, RO systems can deplete minerals and create wastewater. Consider your water quality and consult a professional before installing one.