In 2024, the U.S. Mine Safety and Health Administration (MSHA) issued its final rule, Lowering Miners’ Exposure to Respirable Crystalline Silica and Improving Respiratory Protection. The aim of The MSHA crystalline silica rule is to reduce miners’ exposure to silica, a carcinogen known to cause numerous health complications.
Because silica is the most abundant mineral in the earth’s crust, it poses an acute risk to the respiratory health of miners. Long-term exposure to silica can lead to a wide range of diseases and infections like lung cancer, pulmonary fibrosis, Chronic Obstructive Pulmonary Disease (COPD), and tuberculosis.
What Is the MSHA Final Rule for Respirable Crystalline Silica?
The MSHA silica final rule sets the following regulations for MNM (metal and nonmental) mine operators:
- Lowers the permissible exposure limit (PEL) for respirable crystalline silica to 50 micrograms per cubic meter of air (µg/m3) for a full shift, calculated as an 8-hour time-weighted average (TWA) for all miners.
- Establishes an action level for respirable crystalline silica at 25 µg/m3 for a full shift, calculated as an 8-hour TWA for all miners.
- Includes uniform requirements for controlling and monitoring exposures to respirable crystalline silica at coal and MNM mines.
- Includes medical surveillance requirements for MNM mines, modeled on the existing medical surveillance requirements for coal mines.
- Updates existing respiratory protection requirements by incorporating by reference a voluntary consensus standard by the American Society of Testing and Materials (ASTM) that reflects the latest advances in respiratory protection technologies and practices – ASTM F3387-19 Standard Practice for Respiratory Protection.
The deadline to reach these objectives is April 8, 2026.
To help guide your implementation process, MSHA has published a fact sheet with more information on the required respiratory protection for silica in mines. But respirators alone won’t be enough to meet compliance.
Meet MSHA Silica Rule Compliance and Create a Safer, Healthier Workplace
The MSHA final rule will require mine operators to make some big changes. One easy transition mine operators can make to meet the 50 microgram limit is integrating industrial vacuums and dust collectors. These powerful machines can collect harmful silica dust before it enters your environment by removing dust right at the source. Our systems incorporate HEPA filtration that captures the fine silica particles that pose the greatest health risks.
We can attach dust collectors to your mining equipment that clean the air without slowing down or pausing operations. Removing silica dust before it becomes airborne is crucial to maintaining a healthy and active mine site. As an additional layer of protection, we also strongly recommend cleaning all surfaces with an industrial vacuum once per shift. Regular vacuuming prevents dust buildup, and the HEPA filtration prevents dust from rising and resuspending in the air.
Partner with a Proven Leader in Silica Dust Collection
As a longtime partner for miners, Industrial Vacuum can help you find the right dust collectors and industrial vacuums for your mine site. Our equipment thoroughly and efficiently removes silica dust in the harshest mining environments.
Don’t wait to start your MSHA implementation plan. Smart mine operators start early. Contact us today or request a quote to start your journey to a safe, healthy, and MSHA compliant workplace!