Vienna Wells is a superfund site located at 545-547 N. Chestnut Street, Vienna, MO 65582. The Environmental Protection Agency (EPA) identifies sites such as Vienna Wells 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. Vienna Wells is currently registered as an Active NPL superfund site by the EPA. Because it is on the NPL (National Priorities List), Vienna Wells is considered one of the worst hazardous waste sites identified by the EPA.