People have been exposed to contaminants at levels that may result in adverse health effects.
Current exposures are below levels of health concern.
The hydrogeological setting is complex, making the source of contamination for some of the EBWS production wells difficult to define. A water quality study was completed in 1993. Levels of contaminants in the public water supply are now at or near zero. Private wells were not sampled sufficiently in early site investigations to address levels of contamination or number of persons on private water supplies. The water quality study completed in 1993 identified some private wells that had low levels of contamination.