💡 What exactly is nonpoint source pollution? 👉 Nonpoint source pollution is caused by rainfall moving over or through the ground. As the runoff moves, it picks up and carries away natural and human-made pollutants. Eventually, these pollutants end up in our waterways such as lakes, rivers, wetlands, and more. 🌊 A great example would be water flowing across a parking lot and picking up oil left from cars driving and parking on the pavement. When you see a rainbow-colored sheen on the water flo