Nahant Marsh preserve is one of the largest urban wetlands on the Upper Mississippi River. It is comprised of marshy areas, mesic, wet, and sand prairie, and bottomland forest. Impact 7G is continually working with Nahant Marsh Education Center to develop stormwater wetlands and restored stream banks adjacent to the main marsh.

The purpose of the banks is threefold: to help filter out contaminants from adjacent industrial land uses from entering the main marsh, to increase suitable habitat for threatened and endangered species, and to provide additional revenue for ongoing restoration, conservation, and education efforts. Impact7G helped generate 13.43 emergent wetland credits and 17.80 forested credits for funding long-term management and restoration efforts.