Cal/OSHA Wildfire Smoke Respirator Rule (8 CCR 5141.1)
States what California's wildfire smoke rule (8 CCR 5141.1) requires at the current AQI for PM2.5.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Current AQI for PM2.5
- 180
- Hours of exposure this shift
- 6
Result: At AQI 180 for 6 hours, provide N95s for voluntary use; no fit test is needed.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Current AQI for PM2.5
- PM2.5 concentration (ug/m3)
- Hours of exposure this shift
How this is calculated
Cal. Code Regs. tit. 8, section 5141.1 (Cal/OSHA protection from wildfire smoke). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.