What is the cheapest and easiest form of water treatment?

Heating the water is often regarded as one of the simplest and most cost-effective methods of water treatment, particularly for disinfecting purposes. When water is heated to a certain temperature, it can kill a significant number of pathogens, including bacteria and viruses. This method does not require the addition of chemicals or complex equipment, making it accessible and straightforward for many applications.

In contrast, filtering water may involve more intricate systems to remove particulates and contaminants, which can lead to higher costs and maintenance requirements. Adding chemical agents often necessitates careful handling and monitoring to ensure safe and effective treatment, alongside potential environmental concerns. Using ultraviolet light for disinfection requires specific equipment and electricity, which can add to operational costs. Thus, heating the water stands out as a practical and economical approach to achieving water treatment goals.