Egypt is facing different challenges nowadays, due to unsafe disposal of wastewater. Billions of people worldwide do  not have adequate domestic wastewater treatment, which leads to the spread of infectious diseases and estimated  eaths around 2.1 million every year. In recent decades, both developing and developed countries have made significant efforts to improve sanitation and wastewater treatment technologies. The disposal of untreated wastewater is considered a critical problem for health and environmental issues. It causes contamination of rivers, groundwater and wide spread of viruses and diseases. Depending on centralized treatment of wastewater, which is considered an ineffective solution. Due to excessive cost of established, operation and maintenance, however many countries went to the development of the sewage system through decentralized and community participation. The objective of the current research is to assess different case studies of community participation and its impact on different plants efficiency in Egypt. Ezbet Al-Sheikh Yacoub, Beni Suef that applied wetland and Abd ELkareem Eissa, EL-Fayoum that applied up flow septic tank an aerobic baffled reactor were selected. Analysis to the influent and effluent samples were conducted and different parameters were measured to evaluate the efficiency of wastewater treatment plants. A sample of sludge was examined from Ezbet Al-Sheikh Yacoub plant and was exposed to type of earthworms called Eisenia fetida not only for the purpose of safe disposal, but also to turn them into safe product that can be sold.Finally, we concluded that the treatment plant of Ezbet Al-Sheikh Yacoub is inefficient to comply with Law 48 of 1982 due to wrong operation and defects in implementation of the station, but the treatment plant of Abd EL- kareem Eissa is  efficient and complies with Law 48 of 1982.