What is the best method for the preservation of water quality?

Controlling pollution before it enters water bodies is the best way to protect them, especially when it originates from industrial plants, cities, agricultural areas, and other sources. Pollution is a major problem, particularly in developing countries.

Limiting the amount of nitrogen, phosphorus, and other nutrients that are applied to fields is the best way to manage nonpoint pollution, which is harder to control and comes from sources like agricultural areas and excessive nutrient cases. Point sources, like sewage pipes, are easier to control.

The hardest situations in this issue are sediment pollution by heavy metals or groundwater pollution, which are nearly impossible to control after pollution occurs in the receiving water body.

The best method for the preservation of water quality involves implementing a combination of strategies, including source water protection, watershed management, pollution prevention, and treatment technologies such as filtration, disinfection, and advanced oxidation processes. Additionally, promoting sustainable water use practices, reducing chemical usage, and implementing regulatory measures can contribute to preserving water quality.