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  1. Home
  2. Hazardous Air Pollutants: Ethylene Oxide

Taunton, Massachusetts (Professional Contract Sterilization, Inc.)

Professional Contract Sterilization, Inc. (PCS) is located at 40 Myles Standish Boulevard, Taunton, MA. The facility uses ethylene oxide (EtO) to sterilize medical equipment and materials.

NOTE: On March 14, 2024, EPA announced final amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Ethylene Oxide Commercial Sterilizers. This rule is one of the most important measures EPA is taking to reduce emissions of ethylene oxide and will significantly reduce lifetime cancer risks for people living near commercial sterilization facilities. It will reduce EtO emissions from commercial sterilization facilities to the outdoor air by 90 percent and, once implemented, will reduce the lifetime cancer risk for people living near all commercial sterilization facilities to levels below the Clean Air Act threshold for elevated risk. No individual will be exposed to EtO at levels that correspond to a lifetime cancer risk of greater than 100-in-1 million, and the number of people with a potential risk of greater than or equal to 1-in-1 million will be reduced by approximately 92 percent.

Learn more

The risk information on this page, and the corresponding map from July 2022, are no longer current. EPA is archiving these maps and pages.

EPA scientists and analysts recently completed a risk assessment to understand the impact of EtO emissions from the PCS facility. As part of this risk assessment, we used the most recent available information about how much EtO the company emits into the air and we modeled estimated cancer risks to people living nearby. The risk assessment identified elevated lifetime cancer risk (assuming exposure over 70 years) in the communities of Taunton and Norton, Massachusetts. EPA is committed to working with state and local agencies, facilities, and communities to reduce this risk.

Professional Contract Sterilization, Inc.

This map shows EPA's estimate of lifetime cancer risks from breathing ethylene oxide near Professional Contract Sterilization, Inc. (PCS)  located at 40 Myles Standish Boulevard in Taunton, Massachusetts.  Estimated cancer risk decreases with distance from the facility.  Nearest the facility, the estimated lifetime cancer risk is 900 in a million. This drops to 100 in a million and extends to include parts of  Hill Street, Robert W. Boyden Road, Myles Standish Boulevard, Robert Treat Paine Drive, John Quincy Adams Road,  John Hancock Road, Crane Avenue and Crane Avenue South, Harvey Street, Dickenson Drive, Alcott Circle, and Crane Street within the towns of Taunton and Norton, Massachusetts.
Click on the map to view a larger version of the map and legend in a new browser tab.

This map shows EPA's estimates of lifetime cancer risks from EtO near PCS in Taunton and Norton, MA. As you can see from the map risk decreases with distance from the facility.

The area in blue shows estimated lifetime cancer risks of 100 in a million or greater from breathing air containing EtO emitted from the facility (or the same as 1 additional cancer case in 10,000 people). A lifetime cancer risk of 100 in a million means that, if 1 million people were exposed to this level of EtO in the air 24 hours a day for 70 years, 100 people would be expected to develop cancer from that exposure.

The area in dark blue on the map shows that EtO exposure could contribute to a maximum increased risk level of 9 cancer cases if 10,000 people were exposed for 70 years (or 900 in 1 million). EPA cannot predict whether an individual person will develop cancer.

View a larger version of the map and legend in a new browser tab.

For this risk assessment, we looked at excess cancer risk attributable to a single chemical, EtO. This estimated risk is in addition to the risk of developing cancer from other causes. This is a worst-case scenario that assumes a person stays in the highest risk area 24 hours a day continuously for 70 years. EPA takes this approach because we want to be protective of the most exposed and most vulnerable individuals from risk associated with EtO emissions from this facility.

  • Read additional information on EtO, including information on our current understanding of risks from ethylene oxide.

Community Details

PCS is a small business that has been in operation since approximately 1990 and uses EtO to sterilize medical and veterinary equipment. PCS utilizes a wet scrubber to control emissions from their operational sterilization chambers. PCS utilizes a catalytic oxidizer to control emissions from their operational primary aeration rooms. These controls have been in operation for several years.

EPA is not aware of any planned installation of new control technologies at PCS. There are no air quality monitoring stations measuring EtO in the direct vicinity of the PCS facility. EPA is aware of one daycare and a summer camp near PCS, but outside the area modeled at having risks equal to or greater than 100-in-a-million.

EPA has notified nearby residents, nearby businesses (including the daycare and summer camp), and PCS as part of our pre-proposal outreach. Below are the flyer and postcard that we have provided to residences within one mile of PCS.

  • Flyer: EtO Information for Taunton and Norton, MA (pdf) (67.06 KB)
  • Postcard: EtO Information Session for Taunton and Norton, MA (pdf) (99.93 KB)

What EPA is Doing to Address Ethylene Oxide

Now:  EPA finalized regulations for Ethylene Oxide Commercial Sterilizers that will significantly lower risk in the community. EPA is also working with the Commonwealth of Massachusetts to reduce emissions at PCS. EPA has provided technical support to our air agency partners as part of this work. As part of our strategy to address EtO emissions from commercial sterilization facilities nationally, the Agency is reviewing controls on regulated equipment and processes that emit EtO to determine whether additional air pollution controls are needed. This review includes examining new developments in practices, processes and control technologies, considering cost and feasibility, as well as addressing any previously unregulated emission points.

  • Learn more about the final rule for EtO Sterilization Facilities.
  • For more information about actions you can take.

Virtual Community Meeting on September 13th

EPA Region 1 hosted a community meeting to discuss the risks associated with PCS in the Taunton and Norton, Massachusetts communities on September 13, 2022. Watch a recording of the meeting at: https://youtu.be/BfqJGoiVkV8

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Hazardous Air Pollutants: Ethylene Oxide

  • EPA Actions To Reduce Risk
  • Ethylene Oxide (EtO) Explained
    • Our Current Understanding
    • EtO Risk and Your Health
    • Addressing and Learning About EtO
  • EtO Community Engagement
  • Federal Partnerships on EtO
  • EtO Additional Questions
Contact Us About Ethylene Oxide
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 14, 2025
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