St Joseph County Groundwater Mayflower is a superfund site located at Mayflower Rd, And Sr 23, South Bend, IN 46614. The Environmental Protection Agency (EPA) identifies sites such as St Joseph County Groundwater Mayflower 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 Joseph County Groundwater Mayflower 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.