Final answer:
UV treatment can kill pathogens like bacteria and protozoa in drinking water but does not remove substances that can alter its taste or odor.
Step-by-step explanation:
Treatment of drinking water by UV irradiation is effective at killing bacteria and eukaryotic pathogens, but it does NOT remove odor- and taste-altering organic compounds. UV disinfection is a physical, chemical-free process used to kill a wide range of pathogens, including bacteria, viruses, and protozoa that are resistant to chemical disinfectants. However, it does not remove dissolved organics, inorganic compounds, or particles that may affect the taste and odor of the water.