Environmental mercury (Hg) contamination has been recognized as a threat to NPS resources across the nation, with many waterbodies experiencing moderate to severe impairment. Prior sampling as part of the joint NPS/USGS agency-wide Dragonfly Mercury Project (DMP) indicates Hg concentrations in some Congaree National Park waterbodies maybe particularly elevated.

The study will comprehensively assess of the magnitude, distribution, dynamics, and public health risk associated with Hg bioaccumulation in Congaree NP aquatic habitats. This will provide the data necessary for NPS staff, stakeholders, partners, and neighbors to make informed decisions regarding resource management, potential public health risks, and fish consumption advisories, ultimately reducing the risk to local residents and park visitors alike.