Noise - Recommended Exposure Limits (REL)
The NIOSH Recommended Exposure Limit (REL) for occupational noise exposure. The standard 8-hour Time-Weighted Average (TWA) is 85 dBA, with a peak exposure limit of 140 dBA. Exposures at and above 85 dBA are considered hazardous.
Key Information
- Primary Limit: 85 dBA as an 8-hour Time-Weighted Average (TWA)
- Peak Limit: 140 dBA for continuous, varying, intermittent, or impulsive noise
- Status: Exposures at and above 85 dBA are considered hazardous
- Source: National Institute for Occupational Safety and Health (NIOSH)
Regulatory Context
The NIOSH REL serves as a recommended guideline for occupational noise exposure. Workers exposed to noise levels at or above 85 dBA for 8 hours should implement hearing protection and noise control measures.