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The County of DuPage
Wheaton, Illinois

Sterigenics Information

At the end of August 2018, DuPage County, Willowbrook and surrounding communities were made aware of air sampling completed by the Agency for Toxic Substances and Disease Registry (ATSDR) around Sterigenics facility located in Willowbrook due to its emission of ethylene oxide (EtO) into the atmosphere. ATSDR completed modeling based on the concentrations of EtO which concluded an increase in cancer risk may exist in the area due to exposure to the chemical. 

Below are documents and links with information about County activities as well documents and links to resources about EtO.  The Village of Willowbrook has also provided information on their website as well. Questions can be emailed to the U.S. EPA using the following -

Recent Updates

Below please find court documents including the consent order and proposed legislation. 

Sterigenics Statement Regarding Exiting State of Illinois 9-30-19

Chairman Cronin Statement 9-30-19

Sterigenics Notification of Plant Closure 9-30-19

House Bill 3885 9-6-19  
House Bill 3888 9-13-19
House Bill 3888 Press Release 9-13-19
Removal of Seal Order 9-10-19
Consent Order & Dismissal 9-11-19
Joint Stipulation & Order 9-11-19
Sterigenics Consent Order Overview FAQ 7-16-19
State of Illinois v. Sterigenics U.S., LLC Proposed Consent Order 7-16-19
Sterigenics Motion to Enter Proposed Consent Order 7-16-19  
Sterigenics Consent Order Press Release 7-17-19
State of Illinois Public Act 101-0023  State of Illinois Public Act 101-0022
Amicus Brief Filing Sen. Curran; Rep. Durkin and Rep Mazzochi
County Board Letter to County Legislative Committee Regarding EtO 8-1-19
U.S. Congress Members Letter to U.S. EPA on Sterigenics 7-23-19
Illinois EPA Seal Order 2-5-19  

Below please see the IEPA Notice of Public Meeting regarding issuance of a construction permit for Sterigenics.

August 1, 2019; Ashton Place,341 75th Street, Willowbrook; 6 p.m. to 9 p.m. 
Sterigenics IEPA NESHAP Source Construction Permit Draft July 2019
Sterigenics Fact Sheet July 2019 Application for Construction Permit

Air Testing Results 

Well Testing Announcement

DuPage County Letters & Documents

U.S. EPA Public Meeting

On August 29, 2018, a public meeting was held to discuss the report.  Representatives from the U.S. EPA Region 5, Illinois EPA, Agency for Toxic Substances and Disease Registry and Sterigenics.  View the archive video of the meeting. The U.S. EPA  has also developed a dedicated webpage with additional information regarding the work being done in and around the Sterigenics facility. 

Other Government Agency Correspondence & Resources

Publications with Information about Ethylene Oxide

Health Resources

2013 Ethylene Glycol Leak

Sterigenics completed a site investigation and site remediation in 2013 following a detected leak at the site.  Details regarding the investigation and associated cleanup can be found on the Illinois EPA's website