Oregon wildfire smoke protection rule (OAR 437-002-1081 / 437-004-9791). PM2.5 concentration is canonical.
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| PM2.5 | Respirator requirement |
|---|---|
| 34.5 µg/m³ | PM2.5 below Oregon OSHA wildfire smoke training trigger (35.5 µg/m³). |
| 35.6 µg/m³ | Voluntary — PM2.5 ≥35.5 µg/m³ (training + voluntary respirator) |
| 201 µg/m³ | Mandatory FFR — PM2.5 ≥200.9 µg/m³ (mandatory filtering facepiece use) |
| 500.5 µg/m³ | Full RPP — PM2.5 ≥500.4 µg/m³ (full respiratory protection program) |
Wildfire smoke overlays are excluded from the work/rest composite and are never averaged with WBGT-based standards.
Required inputs: none
Optional inputs: pm25ugm3, aqiPm25, usStateCode, wildfireSmoke, outdoor
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Get notified when Oregon OSHA Protection from Wildfire Smoke (OAR 437-002-1081) changes — threshold changes, scope and legal-status changes, additions and removals. Changes that permit more heat exposure than before are labelled as such.
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