Wastewater is water that has been used and is no longer clean. It comes from various sources, such as homes, businesses, and industries. When we wash dishes, take showers, or flush toilets, the water that goes down the drain is considered wastewater. This water often contains harmful substances, making it unsafe for direct use. To protect the environment and public health, wastewater treatment plants clean this dirty water before it is released back into nature. These facilities use various processes to remove pollutants, ensuring that the treated water is safe for rivers, lakes, and even for irrigation in some cases.