Wells Gandh is a superfund site located at Aberjona River Valley, Woburn, MA 01801. The Environmental Protection Agency (EPA) identifies sites such as Wells Gandh because they pose or had once posed a potential risk to human health and/or the environment due to contamination by one or more hazardous wastes. Wells Gandh is currently registered as an Active NPL superfund site by the EPA. Because it is on the NPL (National Priorities List), Wells Gandh is considered one of the worst hazardous waste sites identified by the EPA.