Radon in workplaces in United States
Requirements that apply to workplaces in United States. They do not apply in other countries.
What the employer must do
OSHA Permissible Exposure Limit (PEL): 100 pCi/L (≈3700 Bq/m³) 8-hour time-weighted average for occupational exposure. Significantly higher than residential level.
Measurement protocol: EPA/ANSI-AARST
Compliance: EPA Citizen's Guide + ANSI/AARST MAH-2023, MA-MFLB-2023, MS-QA-2023
- Reference level
- 148 Bq/m³
- Minimum duration
- 0.07-3 months
- Detector type
- Activated charcoal, electrets, track-etch, continuous monitors
- Measurement period
- Short test: 2-90 days closed-house; Long test: >90 days
- Laboratory
- Devices listed by NRPP (National Radon Proficiency Program) or NRSB
- Legal basis
- EPA 402/K-12/002; ANSI/AARST MAH-2023 (homes), MA-MFLB-2023 (buildings), MS-QA-2023
Official sources
Informative summary. The official text of the regulation prevails. Check the source before taking a compliance decision.
Workplace requirements in other countries