During the investigation into the Hononegah Country Estates plume, several samples were collected in the Evergreen Manor area. At that time, those results were attributed to the Hononegah plume. In retrospect, the detected trace amounts might suggest the beginning of the contaminant plume that was later detected in the Evergreen Manor area. If that is the case, then people might have been exposed to contaminants over an approximately 17-year period. Public water was made available to the homes in Hononegah Country Estates.
Public water is also available to the area under development east and northeast of Evergreen Manor.
In July 1999, residents were given the opportunity to become part of a public water extension into Evergreen Manor. The initial discovery of contamination in Evergreen Manor occurred in November 1990 when a lending institution required a local homeowner to sample a residential water supply. Analysis of the well water showed the water contained elevated levels of VOCs. In December 1990, IDPH initiated a sampling program of the private wells in the area to determine the initial extent of contamination. Approximately 100 residential well samples were collected in December and January.