4500 South 500 West Plume is a superfund site located at 4500 South 500 West, Murray, UT 84123. The Environmental Protection Agency (EPA) identifies sites such as 4500 South 500 West Plume 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. 4500 South 500 West Plume 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.