Rain water drains into a storm drain.


When rainwater or melted snow does not soak into the ground, but instead flows across streets, parking lots, lawns, or other surfaces, it is called 'stormwater'. In areas with hard pavement and roofs that prevent the water from naturally soaking into the ground, even a small rain can cause a fair amount of stormwater. Stormwater, if not planned for and handled correctly, can cause issues such as flooding of roads, buildings and streams, erosion of stream banks, turbidity (muddiness) and habitat loss in the stream due to the eroded soil in the water.

As stormwater runoff flows over the land and impervious surfaces (paved streets, parking lots, curb gutters), it accumulates debris, oils, grease, leaves, grass clippings, pet waste, chemicals, sediments, and other pollutants that can adversely affect water quality if the runoff is discharged into a waterway without being treated. Most stormwater runoff is not treated for water quality before it reaches a ditch, stream, or river.

Sprinklers water a lawn in the rain.


There are many things you can do to prevent storm water issues around your property that have other benefits too! For examples and resources to help you get started, visit our homeowners page!

Wetland plants bloom in a parking lot bioswale.


The Montgomery SWCD partners with communities in Montgomery county to assist them in the implementation of their storm water management plans. Visit our partners page to find out more!