Wastewater treatment is the process of removing contaminants from used water to make it safe for discharge or reuse. This involves physical, chemical, and biological methods to clean the water by eliminating pollutants such as solids, oils, chemicals, and harmful microorganisms. Effective wastewater treatment helps protect the environment, supports public health, and ensures compliance with local regulations. It is essential for industries, municipalities, and facilities aiming to manage water responsibly and sustainably.