St Louis River Site is a superfund site located at Morgan Park, St. Louis County, MN 55808. The Environmental Protection Agency (EPA) identifies sites such as St Louis River Site 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. St Louis River Site is currently registered as an Active NPL superfund site by the EPA. Because it is on the NPL (National Priorities List), St Louis River Site is considered one of the worst hazardous waste sites identified by the EPA.