Recent Updates


September 30, 2019

Sterigenics Announces Plans to Exit Willowbrook Operations 

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September 6, 2019

Sterigenics Comments On Consent Order Approval

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July 24, 2019

Sterigenics Comments On Court Decision To Reschedule Hearing On Consent Order

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July 17, 2019

Sterigenics Reaches Agreement With Illinois Creating Path To Resume Sterilization Operations At Willowbrook Read More

Please find a summary of the agreement here


June 27, 2019

Sterigenics Announces Plans to Enhance Emissions Controls at Willowbrook Facility Read More 


May 29, 2019

Sterigenics Issues Press Release Highlighting Important Facts Regarding Ethylene Oxide Emissions Read More

Sterigenics Letter to EPA Regarding Risk Assessment For Ethylene Oxide in Willowbrook, Illinois: Ambient Air Monitoring Data Read More


March 29, 2019

Sterigenics Issues Response to IDPH Cancer Incidence Assessment Read More


March 29, 2019

Illinois Hospital Association Issues Position on Potential Ban of Ethylene Oxide Read More


March 27, 2019

Sterigenics EO Usage in Relation to EPA EO Detection in Ambient Air Sampling Read More


March 21, 2019

Sterigenics Statement Regarding U.S. EPA Ambient Air Monitoring Results Read More


March 13, 2019

A Note to Readers from the Editor of Chicago Tribune regarding Tribune Sterigenics Coverage Read More

A Letter to the FDA from Minnesota Representatives regarding imminent disruption to supply of medical supplies for patients Read More


March 7, 2019

Sterigenics Statement Regarding U.S. EPA Ambient Air Monitoring Results Read More


February 25, 2019

Sterigenics Response to CBS Read More

Sterigenics Response to CBS – Setting the Record Straight Read More


February 15, 2019

Sterigenics Response to IL EPA Seal Order Read More


February 15, 2019

Sterigenics Response to February 8, 2019 Letter from Congress Read More


February 8, 2019

Sterigenics Issues Statement Regarding Press Conference on Willowbrook Facility Read More


February 5, 2019

Sterigenics Issues Statement on U.S. EPA Ambient Air Sampling Results Read More


February 4, 2019

Sterigenics’ Response to CBS News Segment on Willowbrook Facility Read More


January 26, 2019

Sterigenics Releases Chicago Area Ambient Air Testing Final Report Read More


January 10, 2019

State of Illinois Testing Confirms No Ethylene Oxide Or Ethylene Glycol Contamination Found In Well Water Near Sterigenics Willowbrook Read More


December 19, 2018

Sterigenics Releases Update Regarding EO Air Samples Read More


December 7, 2018

Sterigenics Statement on US EPA Ambient Air Sampling Results Read More


November 29, 2018

Sterigenics Statement To The Willowbrook Community Read More


November 27, 2018

Sterigenics Releases Results of Ambient Air Testing Confirming Background Levels of EO Across Chicagoland Area Read More

Sterigenics Ethylene Oxide Background Levels Data Map


November 26, 2018

Sterigenics Comments on EPA’s Statement Regarding Inaccurate Willowbrook Air Test Results Read More


November 21, 2018

EPA Issues Statement Citing Flawed EO Air Samples Read More


November 18, 2018

Sterigenics’ Letter to Willowbrook and Chicagoland Communities 

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November 13, 2018

Statement From Sterigenics Regarding Illinois General Assembly Hearings

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October 30, 2018

Sterigenics Response to IL Attorney General Lawsuit

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October 29, 2018

Sterigenics Responds to Hinsdale Village President; Reaffirms Commitment to Safety and Collaboration

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October 26, 2018

Sterigenics Releases Statement in Connection With Illinois House Environmental Committee Meeting 

Sterigenics reiterates the critical role of its Willowbrook Facility in protecting the public health while adhering to strict regulations and safe operations. Read more


October 18, 2018

Sterigenics Willowbrook Releases Final Air Quality Results to US EPA and IL EPA

The final reports for the compliance emission control tests that were recently completed at Willowbrook reconfirm that that Ethylene Oxide (EO) emission levels are well below permitted levels and also below detection limits.

Click here for summary of final report.

Click here to access the final Willowbrook I report.

Click here to access the final Willowbrook II report.


October 5, 2018

AdvaMed and iBIO Issue Joint Letter To Illinois Attorney General 

AdvaMed and iBIO express concern over disruption to EO sterilization at Sterigenics Willowbrook and impact on patients and healthcare industry. Read more


October 4, 2018

Ethylene Oxide Sterilization Association (EOSA) Letter to Illinois Attorney General

 EOSA expresses urgent and grave concerns over recent developments. Read more


October 2, 2018

Statement From Sterigenics In Response To Illinois EPA Referral To Attorney General

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September 27, 2018

USEPA Letter To Governor Rauner Regarding Sterigenics Willowbrook

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Sterigenics Announces Willowbrook Air Quality Test Results

Independent testing shows all tests conducted registered emission levels below detection limits on state-of-the-art approved testing equipment. Read more

Sterigenics issues letter in response to ILEPA request regarding Sterigenics Willowbrook test results.



September 25, 2018

American Chemistry Council Calls For Correction To The 2014 National Air Toxics Assessment

American Chemistry Council (ACC) cites flawed science, calls for correction to the 2014 NATA (National Air Toxics Assessment) and other reports that rely on the Ethylene Oxide IRIS Assessment. Read more


September 21, 2018

Update on Sterigenics Willowbrook Testing

Sterigenics completed a two-day test to confirm EO emission reductions achieved by recent voluntary equipment upgrade at the Willowbrook, Illinois facilities. Click here to read more .


September 18, 2018

Ethylene Oxide Sterilization Association, Inc. (EOSA) issues statement

The Ethylene Oxide Sterilization Association, Inc. (EOSA) issues Statement on IRIS Assessment and recent Federal Reports on EO Emissions. Click here to read the statement.


September 13, 2018

Initial review of the ATSDR report

The ATSDR report is a technical report on recent Ethylene Oxide (EO) emissions monitoring for a two-day period in May 2018 in the Willowbrook, IL area.  Click here for more.


Sterigenics’ formal response to Village of Willowbrook letter August 31, 2018

On September 3, 2018, Sterigenics issued a formal response letter to the Village of Willowbrook's letter received August 31, 2018. Click here to read the response letter.