Sewage treatment is a crucial process in managing wastewater generated from residential, commercial, and industrial sources. The treatment of sewage is essential for protecting public health and the environment. This article will explore the concepts of primary and secondary sewage treatment, detailing their processes, significance, and the technologies involved. Understanding these processes is vital for anyone interested in environmental science, public health, or urban planning, as they play a significant role in maintaining clean water resources and sustainable ecosystems.