Audience landing · Wildfire smoke
Smoke is in the air — what to do.
The Sacramento Valley sits in the corridor for upwind wildfire smoke (LNU Complex 2020, Park Fire 2024). When smoke comes in, the District's job is to tell you what today's air quality means for your household, your business, and the people you work with outdoors.
Today's air, plain English
Davis: 47 (Good). Safe for outdoor activity. No restrictions.
Vacaville: 41 (Good). Safe for outdoor activity. No restrictions.
What today's AQI means for your household
| AQI | Category | What to do |
|---|---|---|
| 0–50 | Good | No restrictions. |
| 51–100 | Moderate | Unusually sensitive people should consider reducing prolonged outdoor exertion. |
| 101–150 | USG | Sensitive groups (asthma, heart, lung disease, older adults, kids): limit prolonged outdoor exertion. |
| 151–200 | Unhealthy | Everyone: reduce prolonged outdoor exertion. Cal/OSHA §5141.1 applies for outdoor workers — respirators required. |
| 201–300 | Very Unhealthy | Health alert: avoid outdoor exertion. |
| 301+ | Hazardous | Health emergency: stay indoors. |
Outdoor workers — Cal/OSHA §5141.1
California's wildfire-smoke standard kicks in at AQI ≥ 151 for PM2.5. Employers must provide respirators (N95 or better) for voluntary use, train workers on smoke exposure, and modify work practices when feasible. The Spanish-language version of this guidance is at Aire Fresco para Todos and the Cal/OSHA standard is enforced in the District's jurisdiction.
Make your home a clean-air room
If wildfire smoke arrives, the EPA recommends choosing one room of your home, closing the doors and windows, running a portable HEPA air filter (or a DIY filter built from a box fan plus a 20×20 furnace filter), and keeping the door closed when not entering or exiting.
If you live in a District-designated Disadvantaged Community, you may qualify for a free HEPA filter through Fresh Air For All.