Yellow Springs Instruments Ysi Area Wells is a superfund site located at Us 68 And Brannum Road, Yellow Springs, OH 45387. The Environmental Protection Agency (EPA) identifies sites such as Yellow Springs Instruments Ysi Area 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. Yellow Springs Instruments Ysi Area Wells 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.