Erosion can significantly affect water quality by increasing the levels of sediment and pollutants in the water. Soil erosion can carry pollutants like pesticides, fertilizers, and other chemicals into the water, making it unsafe for human consumption and wildlife.

Moreover, erosion can increase the levels of nutrients in the water, leading to the growth of harmful algae and the degradation of aquatic habitats. This can have a detrimental impact on the health of fish and other aquatic species, as well as the water quality and safety for humans.