Chemetco is a superfund site located at 3754 Chemetco Lane, Hartford, IL 62048. The Environmental Protection Agency (EPA) identifies sites such as Chemetco 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. Chemetco is currently registered as an Active NPL superfund site by the EPA. Because it is on the NPL (National Priorities List), Chemetco is considered one of the worst hazardous waste sites identified by the EPA.