An infiltration basin captures stormwater and infiltrates it into the ground through highly permeable components designed to remove pollutants and promote groundwater recharge. The soil media in these systems treat pollutants via settling, filtration, and biochemical activity. Infiltration basins may be designed as surface or subsurface systems. Subsurface infiltration systems are constructed with underground pipes; a further description and images can be found on p. 28.
The NJDEP does not allow for vegetation in infiltration basins, and does not permit infiltration basins in areas where high pollutant or sediment loading is expected.