Stormwater is a major cause of urban flooding, which is the inundation of land or property in a built-up environment caused by stormwater overwhelming the capacity of drainage systems, such as storm sewers.
Ohio Stormwater Conference is an annual conference dedicated to stormwater management in all aspects of planning, design, implementation and regulatory

When it reaches the surface, stormwater becomes polluted as it picks up, carries, and transports various pollutants (oil, grease, chemicals, sediment, nutrients, pathogens) along streets, drains, open channels, and storm sewer systems.

Water from rain or snow storms, known as stormwater, instead flows over streets, parking lots and roofs and into a water body or storm drain. Stormwater runoff is often worsened by human activities, and can contain nitrogen and phosphorus pollutants from fertilizers, pet and yard waste.
