With the increase in population, natural resources of water are being polluted. Ozone technology reveals one of the most efficient and effective method of achieving pollution removal in water. Ozone is the most powerful broad spectrum microbiological control or disinfecting agent available for water treatment. It is highly reactive and unstable. Considering chlorine which is the most commonly used water disinfectant chemical, O3 is 15% stronger oxidizer and kills bacteria 3000 times faster. The important advantage of O3 is that it produces no toxic by products and is environmental friendly. Ozone breaks large and long chain molecules in to smaller building blocks which are easily biodegradable and less dangerous. But ozone cannot treat certain complex pesticides, man-made molecules and inert gases effectively. Considering all benefits ozone is a good choice for water treatment. For efficiency ozone is outstanding as it is the most powerful broadspectrum micro-biological control or disinfecting agent available. Thus if ozone cannot be used to treat a water quality problem, it is likely that no other available oxidant will do the job either. Hence, from the highest reaches of atmosphere to the deepest of ocean ozone is a very efficient protector, provider and recycler.