Necedah National Wildlife Refuge is a superfund site located at W7996 20th Street West, Necedah, WI 54646. The Environmental Protection Agency (EPA) identifies sites such as Necedah National Wildlife Refuge 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. Necedah National Wildlife Refuge 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.