What is the size range for viruses in water?

Viruses are among the smallest microorganisms found in water, and their size typically ranges from approximately 0.02 to 0.26 microns. This size range is critical for water operators to understand because it influences the effectiveness of various water treatment processes. Traditional filtration methods may not effectively remove viruses, as they can easily pass through filters designed for larger pathogens. Knowing the size range helps operators implement appropriate treatment technologies, such as advanced filtration or disinfection methods, to ensure the safety of drinking water.

In contrast, other size ranges would not accurately represent the dimensions of most viruses, making them less relevant in the context of water treatment protocols. Understanding the actual size of viruses is essential for designing effective systems for water purification and for meeting regulatory requirements related to microbial contaminants.