| ULTRA VIOLET (UV) | OZONE |
| The energy is not enough to destroy all types of bacteria, virus, protozoa, and fungus | Mercilessly kills all bacteria and virus |
| Requires more contact time as the UV rays is stationery & hence water has to be exposed to it for a longer time | The reaction is instantaneous as the gas mixes with water. The reaction rate is 3,200 times faster than any known method |
| If the water is turbid & has high level of suspended solids, the penetration of the rays is not deep | Reduces turbidity and the suspended dissolved solids do not make any difference |
| Scale forms on the tube thereby reducing the disinfections rate | Disinfections rate is constant and there is no scale formation |
| Cannot eliminate algae & biofilms | Eliminates algae & biofilms |
| Cannot kill SPORES of bacteria & virus | Eliminates even SPORES |
| Does not act as flocculent | Act as flocculent |
| Does not eliminate ODOR | Eliminates ODOR |
| Does not eliminate COLOUR | Eliminates COLOUR |
| Cannot treat waste water | Treats any type of water |
| UV light cannot increase or decrease energy | Ozone can be increased or decrease to to desired level for effective treatment of water |
| The Intensity of the bulbs start reducing | Intensity can not waver once fixed |
| Has very narrow application (Bacteria elimination only) | Has wide applications like eliminating bacteria, odor, color, treating waste water, effluent & so on |
| UV intensity can not be measured | Ozone presence can be felt |
| Can not stop corrosion. | Stops corrosion completely |
| Can not store as SPORES will breed and bacteria will come alive | Treatment is permanent |
| Bulbs get fused often | No bulbs involved |
| Needs maintenance | No maintenance required |