Many people have heard that reverse osmosis systems are highly effective at filtering unhealthy and even harmful particulates from the water that your drink. All tap water will have some unhealthy matter in it, and this includes municipally-treated water as well as well water. With RO systems, the water is forced through a semi-permeable membrane that captures 99.9% of these contaminants. Through this filtration process, the water can be healthier to drink and can taste better. It also can remove hard water particles that can damage your pipes, appliances and other items.