The article examines how urban wastewater disposal can lead to eutrophication in coastal areas. It looks at the nutrients in untreated and treated sewage from different types of wastewater treatment plants. The study also considers how excessive nutrients can cause overgrowth of algae or phytoplankton in coastal ecosystems. To prevent eutrophication, it is important to understand the sources of nutrients, the physical characteristics of the disposal area, and the potential nutrient limitations in the ecosystem. By evaluating these factors, strategies can be developed to reduce nutrient discharge from urban wastewater and identify which nutrients need to be controlled in sewage treatment plants.