What is typically the effect of biological contaminants in water sources?

Biological contaminants in water sources are typically associated with harmful health effects. These contaminants can include bacteria, viruses, protozoa, and other microorganisms that can lead to a variety of waterborne diseases. When these pathogens enter drinking water or recreational water sources, they pose significant health risks, such as gastrointestinal illness, respiratory issues, and other infections.

The presence of such contaminants necessitates rigorous water treatment processes to ensure safety for consumption and use. Thus, understanding the impact of biological contaminants is crucial for public health and the management of water quality.