September 30, 2020 - As EPA pursues its mission to protect human health and the environment, addressing the chemical ethylene oxide is a major priority for the Agency. While EPA is making progress in reducing emissions of ethylene oxide from industrial facilities, we also are working to learn more about this chemical. As part of this work, EPA is investigating how much “background” ethylene oxide is in the outdoor air. The document below can help you learn more about the Agency’s work on this issue.