Identifying many unfavourable properties of wastewater and its effects on the environment and public health is crucial. Sewage is a complex mixture of effluents from industrial processes, domestic usage, and agriculture, and it poses a terrible risk of holding infectious agents, heavy metals, plastics microbeads, and toxic chemicals. Such pollutants cause water pollution and promote rapid growth of algae and aquatic plant life at the same time slowing water circulation, affecting aquatic life and causing eutrophication suffering from waterborne diseases, and other chronic sicknesses brought about by chemicals. New risks such as AMR genes and endocrine disruptors add to the picture making it even more complex. In this work, the chemical, biological, and physical properties of the wastewater are discussed with much emphasis on their implications for the environment and health. Besides, it analyzes generic risk management measures, such as the technological developments of treatment processes, efficient legislative mechanisms, and public involvement, and provides recommendations. The outcomes highlighted by the findings suggest that significant enhancements of both, effective interventions and guidance research, are needed for the sustainable improvement of the management of wastewaters as well as the protection of ecosystems and human beings.