What is the typical particle size range for bacteria?

Bacteria typically range in size from about 0.3 to 10 microns in diameter. This size range allows bacteria to be effectively filtered out in various water treatment processes, while also making them small enough to be present in significant numbers in water bodies. Understanding the typical size of bacteria is crucial for water operators because it affects how water is treated and the methods used to ensure safe drinking water.

In the context of water treatment, having knowledge of the size range helps in selecting appropriate filtration systems and disinfection processes that can effectively remove or kill bacteria. Additionally, recognizing that most bacteria fall within this range underscores the need for diligence in maintaining water quality, as even small populations of bacteria can pose health risks if untreated.