Dry wells can be used to reduce the increased volume of stormwater runoff caused by roofs of buildings. While generally not a significant source of runoff pollution, roofs are one of the most important sources of new or increased runoff volume from land development sites. Dry wells can also be used to indirectly enhance water quality by reducing the amount of stormwater quality design storm runoff volume to be treated by the other, downstream stormwater management facilities. Dry wells can also be used to meet the groundwater recharge requirements of the NJDEP Stormwater
Management Rules. See Recharge BMP Design Guidelines in Chapter 6: Groundwater Recharge for a complete discussion of these requirements and the use of dry wells and other groundwater recharge facilities to meet them.