Nutrient management in the Chesapeake region largely has focused on agricultural sources and on municipal wastewater treatment plants. This workshop was convened to advise the Chesapeake Bay Program on the role of atmospheric deposition as a source of nitrogen pollution to the Bay. The most recent evidence suggests that at least one third and probably significantly more of all the nitrogen that reaches Chesapeake Bay comes from atmospheric deposition, which also contributes to acid rain. Most of this deposition falls onto the landscape, and then a portion of it runs off and eventually reaches the Bay.