What is a water quality indicator?

A water quality indicator is defined as a measurable factor that provides information about the health and condition of water. These indicators can include parameters such as pH, turbidity, dissolved oxygen, nutrients (like nitrates and phosphates), and the presence of specific contaminants or biological organisms. The significance of having indicators lies in their ability to effectively summarize the quality of water and help in assessing its suitability for various uses, whether for human consumption, recreational activities, or ecological health.

By monitoring these indicators, water quality professionals can make informed decisions regarding water treatment, pollution control, and overall resource management. This role of indicators is crucial since water quality affects not only the environment but also public health and safety. Thus, the emphasis on a measurable factor highlights the necessity of quantitative data in evaluating water quality and implementing necessary actions to maintain or improve it.