What is a primary benefit of treating domestic wastewater in sewage treatment plants?

Treating domestic wastewater in sewage treatment plants plays a crucial role in reducing pollution that could otherwise enter surface waters. The primary benefit is that it effectively removes harmful contaminants, pathogens, and nutrients from the wastewater before it is released back into the environment. This process helps protect aquatic ecosystems and human health by minimizing the risk of disease and maintaining water quality. By treating wastewater, the treatment plants ensure that fewer pollutants such as bacteria, heavy metals, and organic materials reach rivers, lakes, and other bodies of water, thereby contributing to cleaner and safer water systems. The reduction of pollution not only benefits the environment but also supports recreational activities and wildlife habitats.