Which statement is true regarding the treatment of drinking water?

Disinfection through the use of iodine tablets is an effective method for treating drinking water, particularly in situations where boiling might not be practical. Iodine tablets are widely used because they can effectively kill bacteria, viruses, and some protozoa in water, making it safe for consumption. This method is especially relevant in field situations or emergency contexts where access to boiling water may be limited, and is a common practice in military settings to ensure safe drinking water for personnel.

Additionally, while boiling is indeed a highly effective method for water purification, it is not the only option available. Filters can also provide a means of treatment, typically by removing particles and some pathogens, but may not be sufficient on their own for complete disinfection against all types of microorganisms. The claim that no treatment is necessary for potable water is misleading, as it is essential to confirm the quality of water before consumption, especially in areas where contamination is possible. Therefore, the use of iodine tablets represents a practical and established method for water disinfection in various conditions.