According to a blog called Avoiding Evil:

It seems that the city of Sullivan, MO has recently announced that its public water supply has been contaminated with a chemical called Trichloroethylene or TCE. Prolonged exposure to TCE causes severe damage to the liver, lungs, kidneys, and central nervous system, including nausea, unconsciousness, cancer, or even death. It also has the potential to reduce the property values in and around the Sullivan area due to the poor water supply. Seems that a local piston factory had dumped its waste years ago and it is seeping into the water supply. Yay.

We can't find any official news reports, but did discover low level TCE elevations (some that appear to exceed the federal MCL of 5 ppb) in the City of Sullivan public water supply 2004 Consumer Confidence Report.