Which contaminant category includes viruses and bacteria?

The category that includes viruses and bacteria is biological contaminants. This classification encompasses a range of living organisms that can pose risks to human health when present in drinking water. Biological contaminants are typically microorganisms such as bacteria, viruses, and protozoa that can lead to diseases if ingested.

Understanding this category is crucial for water treatment operators, as these organisms can resist conventional treatment processes and may lead to outbreaks if not effectively managed. Monitoring for biological contaminants is a key part of maintaining water safety and ensuring public health. Thus, emphasizing the need for effective disinfection methods and regular testing for these pathogens is essential in water quality management.