Black Brook Watershed
The Black Brook watershed is in the southern section of Windham. It runs along the eastern side of Route 202, between Route 302 and River Road.
Black Brook watershed is one of the smallest watersheds in the Presumpscot River watershed system. At approximately 3.9 square miles, it makes up 2% of the Presumpscot River watershed system.
The population of the Black Brook watershed is a little over 1,000, or 2% of the population in the Presumpscot River watershed system.
Impervious surfaces are those surfaces in the landscape that cannot infiltrate rainfall, such as rooftops, pavement, sidewalks, driveways and compacted earth. Impervious surface areas of 10% or greater are often correlated with reduced water quality. Approximately 9% of the Black Brook watershed, more than 200 acres, is comprised of impervious surfaces.