What is the permissible exposure limit for mercury?

The permissible exposure limit (PEL) for mercury is set at 0.05 mg per cubic meter of air. This limit is established to protect workers from the harmful effects of mercury exposure, which can include neurological damage, kidney damage, and other serious health issues. The PEL is based on a time-weighted average over an 8-hour workday and is part of occupational safety regulations aimed at minimizing risk to individuals who may be exposed to hazardous substances in the workplace.

Setting the limit at this level helps ensure that mercury vapors in the air remain at concentrations low enough to avoid acute and chronic health problems associated with higher levels of exposure. Proper monitoring and control measures are necessary to maintain air quality within this limit, ensuring the safety and health of workers who might be in environments where mercury is present.