The Portland and South Portland watershed area is considered a priority by EPA New England and Maine Department of Environmental Protection (MEDEP). The rich diversity of plants and animals, the natural beauty, water quality, and the many special qualities of the urban estuarine habitat of the Portland area have placed this among the highest environmental priorities listed for protection.
Bridges, T. (2008). Wet Weather Water Quality Study Portland and South Portland, Maine: Project Report. Portland, ME: University of Southern Maine, Muskie School of Public Service, Casco Bay Estuary Partnership.