Stormwater runoff is detrimental to waterways as it carries pollutants, sediments, and nutrients from urban and agricultural areas into rivers, lakes, and oceans. This runoff can lead to water quality degradation, harming aquatic ecosystems and biodiversity. Excess nutrients from runoff can cause algal blooms, depleting oxygen levels and threatening fish and other aquatic organisms. Additionally, stormwater can increase the risk of flooding and erosion in surrounding areas. Implementing effective stormwater management practices, such as green infrastructure and permeable surfaces, is essential for protecting water quality and maintaining healthy ecosystems.