Sewage treatment is a crucial process that ensures the safe disposal and management of wastewater generated from households, industries, and other sources. The treatment of sewage is essential for protecting public health and the environment. The process typically involves four main stages: preliminary treatment, primary treatment, secondary treatment, and tertiary treatment. Each stage plays a vital role in removing contaminants and ensuring that the treated water is safe for discharge or reuse. Understanding these stages not only highlights the complexity of sewage treatment but also emphasizes its importance in maintaining ecological balance and public health.