Which is Better – RO or UV Water Purifier?

The question that is mostly asked by people who are choosing the best water purifier has to be related to their dilemma in choice of the purifier from an RO and a UV water purifier. Even when both these kinds of purifiers work in different ways, they are still useful in the process of water purification. However, to make the right choice, one must know the type of method that is incorporated in these purifiers. Often we see people getting confused because they are not aware of the functioning purifiers. But please stop worrying as we are here to solve this problem.

RO or UV Water Purifier Difference 


The information regarding these water purifiers is vast. However, we have condensed it as much as we can so that you can understand everything while skimming through the details. Firstly, we have described the purifiers. And then, we have mentioned their advantages and disadvantages. With all of this information, you will come to know the purpose of these water purifiers. Once you have that knowledge, you will become capable of choosing the best water purifier from the two types. Keep reading to know everything that is mentioned below –

RO Water Purifier


For filtering water in reverse osmosis (RO) purifier, there is the provision of a semipermeable membrane. This membrane is extremely selective and hence only lets small water molecules pass through it. When it comes to bigger particles such as molecules of harmful chemicals like fluoride and chlorine, this membrane does not allow the passage. It also does not let pathogens pass through its structure. As a result, water gets purified and becomes exceptionally safe for drinking and consumption. The process of osmosis is the one where molecule passage occurs with respect to the concentration on both sides of the membrane. Other than harmful chemicals and germs, the semipermeable membrane is also useful in removing salts from water.  

Advantages of an RO Water Purifier:

  • This kind of water purifier is very functional in the removal of dissolved solids and heavy metal particles. It also helps in minimizing the chances of water-borne diseases.
  • It helps improve the taste of drinking water as it is also capable of removing unwanted salt that alters water’s taste.
  • RO water purifiers are incredibly safe and easy to maintain throughout their usage.

Disadvantages of an RO Water Purifier:

  • For the operation of an RO water purifier, electricity and optimum water pressure are always needed.  
  • The amount of wastewater produced by an RO water purifier is high. The ratio of filtered water and wastewater is 1:1.

UV Water Purifier


UV stands for ultraviolet in the name of this kind of water purifier. Unlike the RO purifiers, the UV water purifier does not need electricity for its operation. Hence, it is more environmentally friendly comparatively. For the purification process, the purifier consists of a UV lamp that emits light. When microorganisms come in contact with the rays of this light, they get damaged and eventually become dead. This whole process inactivates the metabolism of these germs to make the water safe. The dead bodies of these germs remain in the water. However, you must know that inactive and dead germs cannot cause any type of disease in our bodies. Hence, do not be afraid of consuming the water from these filters. Besides bacteria and many types of viruses, the UV water purifier is also capable of destroying cysts from water. When the water TDS is low, UV water purifiers will prove to be the best purifiers.

Advantages of a UV water Purifier:

  • The cost of maintaining these types of water purifiers is meager and can be easily afforded.
  • The UV lamp in the filter can be taken out and replaced very quickly. This filter also does not require electricity for the water purification process.
  • The essential minerals useful for our bodies are always preserved in the drinking water when a UV water purifier is used.

Disadvantages of a UV water Purifier:

  • Unlike the RO purifier, UV purifiers cannot make the water taste better as they cannot remove salts from water.
  • There are many types of toxic chemicals that are found in the water in some areas. A UV water purifier cannot remove such compounds.

Final Verdict:

If you have read the separately mentioned advantages and disadvantages, you would know which kind of purifier will already suit your household. But if you are still confused, then you must understand that if the water supply at your home has high chemical toxins sticking to an RO purifier will help; however, if you are worried about the electricity consumption of such purifiers, you can also choose the UV water purifier. Both the purifiers do different kinds and levels of water purifying. Thus, always make your choice wisely. We are hoping that our information on both the purifiers helped you in your decision.

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