Hatheway And Patterson is a superfund site located at 15 County Road, Mansfield, MA 02048. The Environmental Protection Agency (EPA) identifies sites such as Hatheway And Patterson 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. Hatheway And Patterson is currently registered as an Active NPL superfund site by the EPA. Because it is on the NPL (National Priorities List), Hatheway And Patterson is considered one of the worst hazardous waste sites identified by the EPA.