What Is the Chance of Getting Mesothelioma From Asbestos Exposure?
Written by Tonya Nelson on April 15, 2026
You may know that asbestos exposure can lead to a mesothelioma diagnosis. Since asbestos was widely used in construction and household products, avoiding it entirely isn’t always possible. How likely are you to develop mesothelioma if you are exposed to asbestos? Understanding your risk is important for making informed decisions about your health.
It's important to keep in mind that no amount of asbestos exposure is safe. Even short-term exposure can trigger a serious illness. But experts say the risk of developing mesothelioma comes down to 2 main factors:
- Time since the first exposure
- Total amount of asbestos you were exposed to
Mesothelioma risk increases with time, along with the intensity and duration of your asbestos exposure. But exactly how high is that risk in specific situations? Let's review some study data to find that answer.
Study: Risk of Mesothelioma Among Libby Vermiculite Workers
Libby, Montana, is well-known as an asbestos-plagued town. In the past, it had a busy vermiculite mine that was contaminated with asbestos. The mine ceased operations long ago, but not before many of its workers fell ill.
This group of workers can help us understand the real-world chance of getting mesothelioma from asbestos exposure. In a study, researchers reviewed the medical records of 1,672 Libby mine workers. Of that group, about 770 had died at the time of the study. And 15 of them died from pleural mesothelioma.
The risk of developing pleural mesothelioma in this group of asbestos workers was 1% – 2%. Those who died from mesothelioma worked in the mine for an average of about 11 years. Let's put this in context:
- Libby mine workers were exposed to concentrated asbestos for over a decade.
- Out of every 100 workers, 1 – 2 developed mesothelioma cancer.
You may be quick to conclude that this is a fairly low risk, but keep in mind it's not the only risk. Asbestos causes many other illnesses, including lung cancer and asbestosis. In the same group of Libby miners, 99 died of lung cancer and 40 of asbestosis. So the total risk of dying from an asbestos disease was 9% – 19%. In other words, up to 1 out of 5 workers died because of their asbestos exposure.
What Does This Mean for You?
The average person isn't going to have the same intensity or duration of asbestos exposure as the Libby mine workers. In general, this means the average risk of mesothelioma is fairly low. But that doesn't mean asbestos exposure is safe. It absolutely is not. Experts recommend avoiding asbestos as much as possible.
In the United States, asbestos isn't fully banned. Older materials, called legacy asbestos products, can lurk in homes, workplaces and schools. You can help keep your risk as low as possible by learning where asbestos is most likely to be found. The topics below are a good starting place:
