ABSTRACT

The microbiology in river water starts with the organisms and nutrients picked up as the water flows over the land surface. The concentration of organic matter in the river water limits the growth of bacteria, fungi, and actinomycetes. The potential for pathogenic microorganisms increases as animals begin to encroach on the river water. The growth of bacteria removes dissolved oxygen from the river water while the air above the water surface attempts to replenish the oxygen that has been removed. Water storage is one of the simplest methods for reducing bacteria populations in contaminated river water entering lakes. Man-made reservoirs have been constructed on rivers for flood control, water supply, and recreation. Waterborne pathogens have been a major factor in the control of human populations. There are many different types of waterborne pathogens. Viruses, bacteria, protozoa, and worms are part of the important pathogenic microorganisms found in water.