While chemicals play a critical role in sewage treatment, their use must be carefully managed to minimize environmental impact. Overuse of coagulants and flocculants can lead to increased sludge production, requiring additional handling and disposal considerations. Moreover, residual chemicals in treated effluent can pose risks to aquatic ecosystems. Therefore, sewage treatment facilities are increasingly adopting strategies such as chemical substitution, optimization of dosages, and the use of advanced treatment technologies to mitigate these risks.