Chemical and Microbiological Quality of Runoff Into and Out of Dry Wells; A Case Study in Millburn, NJ

摘要

Since 1999, the city of Millburn has required dry wells to accommodate additional flowsfrom newly developed areas. This new requirement to divert the increased roof and impervioussurfaces runoff to dry wells was established to mitigate local drainage and water qualityproblems. One of the components of this EPA funded project was monitoring stormwater flowsfrom individual properties to the dry wells and associated exiting subsurface waters beneathseveral feet of soil beneath the dry wells. Bacterial and chemical water quality was measuredduring ten rain events in three different dry wells and at one water storage cistern location. Thedry well findings reported in this paper indicate that the dry wells did not significantly changeany of the water quality concentrations for the observed stormwater constituents. The cisternsystem did result in significant reductions in bacteria levels.