What is Uv Water Purification Disadvantages and Advantages 2021

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Sedimentation, straining, surface capture, flocculation, or even chlorination are mechanisms of treating water. After using all these methods, your home water may not be as safe as you think. These methods only remove sediments and other particles. 

What about waterborne microorganisms? How would you get rid of them? Try using the ultraviolet purification method. However, it is great to know about UV water purification disadvantages before using this technology. It is safe, cost-effective, and friendly to the environment. Read on to find out more.

What Is Uv Water Purification?

Ultraviolet water purification refers to a chemical-free way of treating water to make it safe for consumption. This is a natural way of passing a lethal dose of natural ultraviolet light through the water to kill harmful microorganisms. Ultraviolet light has invisible rays that pass through the water to purify. 


Sunlight is the commonest and only natural source of UV light. Other sources (artificial) of UV light include curing lamps, mercury vapor lamps, halogen lights, black lights, tanning booths, germicidal lamps, incandescent, fluorescent sources, and arc welding.

UV water purification systems use mercury vapor and germicidal lamps. It is the most cost-effective way to protect against waterborne disease-causing microorganisms, bacteria, and virus-like:

  • Cryptosporidium
  • Salmonella
  • Hepatitis B
  • Algae
  • Cholera
  • Fungi
  • Streptococcus
  • E. coli
  • Mycobacterium tuberculosis

Is Uv Water Purifier Harmful?

Purifying water by use of high radiation ultraviolet light is not harmful. What makes water harmful, in most cases, is the chemical used in the treatment process. Chemicals like chlorine, chloramines, and chlorine dioxide used in water treatment have adverse side effects. Their by-products increase the risk of liver problems, cancer, kidney problems, and anemia.  

The UV water purification process is chemical-free and environmentally friendly. The absence of chemicals means UV light acts on the water by destroying pathogenic bacteria. If left in the water, the bacteria would cause fatal diseases.

Unlike chemical water filtration, UV water treatment does not alter the water’s taste, color, and odor. 

Other Advantages Of Uv Water Purification

  • It is affordable and cost-effective
  • Needs minimal maintenance; only lamp and sleeve need annual replacement.
  • Works all day and all night, continuously keeping the water safe.
  • There is no need for you to handle potentially hazardous chemicals like chlorine. Also, the risk and cost of dealing with the harmful disinfection of by-products are eliminated.
  • UV radiation is as effective as eliminating 99% of bacteria, germs, viruses, and molds.
  • Instant water purification; all you need to do is switch on the electricity.

Uv Water Purification Disadvantages

As much as UV water purification is safe, it has disadvantages. These disadvantages may make it hard for you to decide whether to consider this system for purifying your residential water. The UV water purification disadvantages include:

Not Effective Enough To Purify Drinking Water:

The ultraviolet dosage produced by the UV lamp is not lethal enough to kill all contaminants to make water safe for drinking or cooking. The radiation is only enough to eliminate bacteria, viruses, molds, and other microorganisms. 

Chlorine, heavy metals, and other volatile organic compounds may not be eliminated as the water passes through the UV water purification system. You will need to purify the water some more to get rid of these compounds.

Does Not Remove Dissolved Impurities:

As much as the water is safe and free from bacteria and viruses, it still has dissolved particles. Particles from rust, fluoride, pesticide, and arsenic may dissolve in water. UV light rays do not remove these particles from the water.

Only Works With Clear Water:

UV water purification systems may not be very effective if the water contains sediments, is muddy, or has other particles. If the water is muddy or contains other particles, you may need to pass it through other filtration systems first. If water is not filtered, microbes can hide in the particles, shielding them from UV light.

Heats The Water:

If water is left sitting in the chamber for some reason, the UV lamp heats it. Electricity generates heat that heats the water.

Relies On The Availability Of Electricity:

A UV water purification system will only work if electricity is available. Thus, in areas that experience a frequent power outage, UV water purification may not be possible. This means you need a constant electricity supply for the system to work always.

No Water Storage Tanks:

Among the many UV water purification disadvantages is that it does not come with a water storage tank. You need to invest in a durable tank large enough to store water.

Hard To Know When The System Is Not Working:

Due to ultraviolet light’s invisible nature, it becomes tough to know when the purifier has stopped working. As a result, un-purified water may come out of the system. This is the reason why experts recommend you change the purifier tube at least once every year.

Uv Rays May Miss Some Microorganisms:

Different wavelengths of UV rays kill different microorganisms. If the water does not pass through the chamber for a considerable duration and the right intensity is not passed through it, some microorganisms will not be killed. 

UV light does not remain in the water. In most cases, this will happen if you bought a purification system that does not provide various radiations. Therefore, you will need to pass the water through another treatment mechanism for it to be pure.

Final Thought 

Despite the UV water purification disadvantages, it is essential to install a good UV water purification system. Not because it is affordable and good for the environment but also because it is safe for you. Once you start using this system, you reduce trips to the hospital and agricultural stores. 

However, do not forget to clean the water before it passes through the system and remove dissolved particles. Please take advantage of this natural system of purifying water and make the most out of it. We all need clean and pure water for home use.

Kyle Wood

Hi, I am Kyle Wood. I have a home gadget tools selling shop, where I sell different types of UV water purifier and saltwater UV sterilizer & its related accessories. Because of my business, I have to deal with so many clients of the UV water purifier and saltwater UV sterilizer users. I found many of my clients are facing difficulties with installation, maintenance, not getting the exact amount of service, and buying the wrong one. All those problems they face because of their lack of knowledge about these products. 

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