Stormwater is water that enters streams after rain events. This is a natural process in undisturbed areas, however, human development can change the timing, duration, and quantity of flows reaching streams after rain events. This is because impervious surfaces (such as asphalt or roof-tops) prevent the natural infiltration of rainwater and typically route water directly to streams. This can lead to severe flooding and erosion issues and is a major source of pollution to streams and rivers. To address draining and flooding problems caused by stormwater, the Clermont County Storm Water Management Department was created and strives to enhance the quality of life in Clermont County by improving water quality through proper planning and through the promotion of effective stormwater management practices. Visit the Storm Water Management Department’s website for more information.