California wildfire smoke protection regulation (Title 8 §5141.1). PM2.5-specific AQI standard.
Browse all standards → · Evaluate every standard at once in the calculator →
The drag-to-check calculator needs JavaScript. Every value it can show is a row of the table below, which is computed by the same engine.
No standalone formula is published for this standard; see programmable logic and parameters below.
| AQI for PM2.5 | Respirator requirement |
|---|---|
| 150 | AQI for PM2.5 below Cal/OSHA §5141.1 trigger (151). |
| 151.1 | Voluntary — AQI for PM2.5 ≥151 (respirator voluntary) |
| 500.1 | Full 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.
Required inputs: none
Optional inputs: aqiPm25, pm25ugm3, usStateCode, wildfireSmoke, outdoor, filteredIndoorAir
This standard was added to the calculator.
Get notified when Cal/OSHA Protection from Wildfire Smoke (Title 8 §5141.1) changes — threshold changes, scope and legal-status changes, additions and removals. Changes that permit more heat exposure than before are labelled as such.
Paste this address into any feed reader:
https://heatrules.com/standards/cal_osha_wildfire_smoke/feed.xml
Open the feed · All update feeds · No account or email address is needed; the site keeps no subscriber list.
If a threshold, trigger, exemption, date or duty here disagrees with the governing text, tell us and point at the section. The form arrives with this standard already named, and a correction is checked against the same primary document it was encoded from.