Argentum Mill is a superfund site located at Ne1/4 Sec 17 T3n R36e, Columbus Marsh, Dyer, NV 89010. The Environmental Protection Agency (EPA) identifies sites such as Argentum Mill 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. Argentum Mill 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.