Why is water from your waterways not clean enough to drink?

Water from waterways is often contaminated due to various pollutants, including industrial waste, agricultural runoff, sewage discharge, and plastic debris. These contaminants can introduce harmful bacteria, chemicals, and heavy metals into the water, making it unsafe for human consumption. Additionally, natural processes like sedimentation can fail to filter out these pollutants effectively. As a result, water from rivers, lakes, and streams typically requires treatment before it is safe to drink.