What is meant by raw water?

Raw water refers to untreated water that comes directly from natural sources such as rivers, lakes, ponds, or groundwater. This type of water has not undergone any purification or chemical treatment processes and is typically characterized by the presence of various natural contaminants, including sediments, microorganisms, and other pollutants that may be present in the environment.

Understanding the definition of raw water is crucial in the context of water treatment and supply, as it serves as the starting point for producing safe drinking water. Water from these natural sources must be properly treated to remove harmful substances before it can be considered safe for human consumption.

The other options describe different states of water that are either treated or have added components. Treated water is processed to ensure it meets safety standards for consumption, chemically altered water involves the addition of specific chemicals to modify its qualities, and water with additives and minerals has been enhanced or modified to include various nutrients or flavorings. Each of these options represents a stage or type of water that is not in its raw, untreated form.