ABSTRACT
Microorganisms are significant in water and wastewater because of their roles in disease transmission and in biological treatment processes. Water, wastewater, and other water practitioners must have considerable knowledge of the microbiological characteristics of water and wastewater. Simply put, waterworks operators cannot fully comprehend the principles of effective water treatment without knowing the fundamental factors concerning microorganisms and their relationships to one another; their effect on the treatment process; and their impact on consumers, animals, and the environment.
