How many major classifications of agents that alter water quality are there?

The classification of agents that alter water quality is a crucial aspect of understanding how various factors impact the safety and suitability of drinking water. There are four major classifications of these agents: physical, chemical, biological, and radiological.

Physical agents include physical changes in water and its properties, such as temperature and sediment load, which can affect its quality. Chemical agents encompass a wide range of substances that can contaminate water, including heavy metals, pesticides, and nutrients. Biological agents are living organisms, such as bacteria, viruses, and parasites, that can pose health risks through contaminated water. Lastly, radiological agents pertain to radioactive substances that may be present in water sources.

Understanding these four classifications helps water operators identify potential contaminants and apply the appropriate treatment measures to ensure safe drinking water for communities.