What are the main categories of water contaminants?

The main categories of water contaminants include biological contaminants, such as bacteria, viruses, and parasites; chemical contaminants, which encompass heavy metals, pesticides, and industrial chemicals; physical contaminants, including sediments and debris; and radiological contaminants, such as radioactive isotopes. Each category poses different risks to human health and the environment, making water quality monitoring essential. Proper treatment and regulation are necessary to manage these contaminants and ensure safe drinking water.