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Cal/OSHA Protection from Wildfire Smoke (Title 8 §5141.1) — Wildfire Smoke Exposure Thresholds (PM2.5 / AQI)

California wildfire smoke protection regulation (Title 8 §5141.1). PM2.5-specific AQI standard for occupational wildfire smoke exposure.

Open Cal/OSHA Protection from Wildfire Smoke (Title 8 §5141.1) in the interactive Guidance Wiki →

Authority
California Division of Occupational Safety and Health
Jurisdiction
California Usa
Legal status
Regulation
Rule type
Smoke Overlay
Standard ID
HGC-074

Governing formula

No standalone formula is published for this standard; see programmable logic and parameters below.

Wildfire smoke thresholds

AQI for PM2.5Respirator requirement
150AQI for PM2.5 below Cal/OSHA §5141.1 trigger (151).
151.1Voluntary — AQI for PM2.5 ≥151 (respirator voluntary)
500.1Full RPP — AQI for PM2.5 above 500 (respirator mandatory)

Wildfire smoke overlays are excluded from the work/rest composite and are never averaged with WBGT-based standards.

Inputs

Required inputs: none

Optional inputs: aqiPm25, pm25ugm3, usStateCode, wildfireSmoke, outdoor, filteredIndoorAir

Sources

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