The primary impact of urbanization on water quality is the increased pollution load in aquatic systems due to impervious surfaces, leading to higher runoff rates. Urban areas typically experience more runoff, which carries various pollutants—such as heavy metals, oils, and nutrients—into rivers and lakes, degrading water quality. This pollution can contribute to eutrophication, harming aquatic ecosystems and reducing biodiversity. Furthermore, urbanization can alter natural hydrological patterns, increasing sedimentation and temperature in water bodies. Addressing these impacts requires sustainable urban planning and effective stormwater management to protect water quality.