Mark Twain Industries is a superfund site located at Industrial Park, West Frankford, IL 62896. The Environmental Protection Agency (EPA) identifies sites such as Mark Twain Industries 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. Mark Twain Industries is currently registered as an Active superfund site by the EPA. However, it is not on the NPL (National Priorities List), which means the EPA does not consider it one of the nation's most hazardous waste sites.