Congress Development Company/Allied Waste Transportation,
Inc., Hillside Landfill
The 55-acre former municipal solid waste landfill located at 4100 West
Frontage Road, Hillside, Illinois, commonly known as the Congress Landfill
or the Hillside Landfill is owned by Congress Development Company and has
been operated by Allied Waste Transportation, Inc. since 2007. During the
history of the landfill, odor complaints have been common. In 2005, there
was a significant increase in the frequency and strength of odors impacting
residents surrounding the landfill and a resulting increase in odor complaints
to the Illinois Environmental Protection Agency. In 2006, landfill gas was
found to be migrating offsite potentially causing hazardous conditions in
nearby buildings. The Illinois EPA and the Illinois Attorney General’s
Office took action at that time forcing the landfill to address problems
that were immediately dangerous offsite, including requiring monitors in
basements for the detection of landfill gas. Since 2006, there have been
continuing odors, high landfill gas readings and other incidents including
a leachate release in 2009, although actions taken by the landfill to address
these issues have greatly reduced the strength and frequency of these issues.
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