The maps linked below show the areas of groundwater contamination in gray and the air sampling area as a yellow line. Homes within or touching the yellow line are eligible for testing.
Frequently Asked Questions
EPA's Vapor Intrusion Website
ToxFAQs (Agency for Toxic Substances and Disease Registry's Toxic Substances Portal)
The Air Force has tested the air in more than 2,000 homes since 2000. Testing is done during the heating season (November through March). Research has shown that this is the best time to detect vapor intrusion.
How the air is tested
Can household products trigger a detection?
Sampling method fact sheet
Preparing your home for testing
Past industrial activities at Hill AFB used a variety of chemicals to clean aircraft parts. Before environmental laws regulated how those chemicals were used and disposed, they were dumped into disposal pits. Over time, those chemicals seeped down into the ground, eventually reaching the shallow groundwater. The groundwater carried those chemicals off base and into the communities surrounding the base. In the early 2000's, the Air Force discovered that vapors from contaminated groundwater could be entering homes off base. Soon after, the Air Force began testing homes around the base for these chemical vapors.
Click here to see how vapors can enter homes.
Chemicals of concern
Keeping vapors out of the home
Indoor Air Program Manager:
75th Air Base Wing Public Affairs
U.S. Environmental Protection Agency, Region 8:
(800) 227-8917 ext. 312-6666
Utah Department of Environmental Quality:
Muhammad (Mo) Slam (Project Manager)
David Allison (Public Involvement)
The sampling season for 2019 begins October 2018 and runs through March 2019. If you live or have a business in an area eligible for testing, you either have or will receive a certified letter inviting you to have your home or business tested. Letters were mailed out in October of 2018. If you do not receive a certified letter, you are not in an area where vapor intrusion is an issue.
If you received a letter, please return the enclosed postcard so we can schedule your home or business for testing. We encourage everyone within the eligible areas to have their home or business tested, even if you've been tested before.