What technique is often used to disinfect drinking water on-site?

The technique of adding chlorine or using ultraviolet (UV) light is widely recognized for disinfecting drinking water on-site because both methods are effective in eliminating harmful pathogens that can cause illness. Chlorination is a chemical process that involves adding chlorine to the water, which kills bacteria, viruses, and other microorganisms. It is often favored due to its residual effect, meaning that the chlorine remains in the water for some time, providing ongoing disinfection as the water is distributed.

On the other hand, ultraviolet (UV) light disinfection uses specific wavelengths of light to penetrate and disrupt the DNA of microorganisms, effectively rendering them inactive. This method is advantageous because it does not introduce any chemical byproducts into the water and is effective against a wide range of microorganisms.

Both methods are convenient for on-site use because they can be implemented relatively easily and quickly, providing immediate safe drinking water.