Rain gardens are shallow, landscaped depressions that capture stormwater runoff from rooftops, sidewalks and streets. The runoff is filtered and allowed to infiltrate into the ground over a period of 24–48 hours. During this time, much of the pollutants found in the stormwater can be removed by physical, chemical and biological methods. Rain gardens:
The stormwater filters into the soil within 24–48 hours; specifically so that there is not sufficient time for mosquitoes to breed. This infiltration of stormwater does provide input to the groundwater. This also reduces the water entering the catch basin which travels to the nearest stream or waterbody, often causing flooding even during small rain events.
Download the free Rain Garden Manual of New Jersey.
Hillsborough residents can get a rebate of up to $450 for installing a rain garden (423k PDF).
This rain garden was designed by Tobiah (Toby) Horton, assistant professor in the Rutgers Department of Landscape Architecture, and New Jersey Agricultural Experiment Station (NJAES) extension specialist in landscape architecture.