Oakland Air Quality in 2025
In 2025, Oakland's air quality (San Francisco-Oakland-Hayward, CA area) had a median daily AQI of 21 (Good) across 95 monitored days. 0 days (0.0%) reached Unhealthy for Sensitive Groups or worse, 87 were Good, and the year's peak AQI was 66 (Moderate). Fine particulate matter (PM2.5) set the daily AQI on 95 of those days. The cleanest month of 2025 was January (median AQI 21, 0 days above 100) and the worst was May (median 42, 0 days above 100, peak 62).
- Good: 91.6%
- Moderate: 8.4%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How was Oakland's air quality in 2025?
Good on a typical day: median AQI 21, with 0 days above AQI 100 out of 95 monitored.
- ✓Peak AQI in 2025: 66 (Moderate).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 95 days.
- ✓Cleanest month: January; worst: May.
Frequently asked questions
What was the average AQI in Oakland in 2025?▾
EPA's Air Quality System puts Oakland's (San Francisco-Oakland-Hayward, CA) median daily AQI for 2025 at 21, which is Good. 0 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 66.
Which month had the worst air quality in Oakland in 2025?▾
The cleanest month of 2025 was January (median AQI 21, 0 days above 100) and the worst was May (median 42, 0 days above 100, peak 62).
Oakland month by month in 2025
Oakland air quality month by month, 2025 (San Francisco-Oakland-Hayward, CA, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| Januarycleanest | 11 | 21 | 0 | 32 | PM2.5 |
| February | 9 | 16 | 0 | 29 | PM2.5 |
| March | 10 | 25 | 0 | 32 | PM2.5 |
| April | 8 | 26 | 0 | 55 | PM2.5 |
| Mayworst | 11 | 42 | 0 | 62 | PM2.5 |
| June | 9 | 48 | 0 | 56 | PM2.5 |
| July | 9 | 13 | 0 | 47 | PM2.5 |
| August | 9 | 19 | 0 | 42 | PM2.5 |
| September | 10 | 21 | 0 | 66 | PM2.5 |
| October | 9 | 20 | 0 | 41 | PM2.5 |
How 2025 compares
2025's median of 21 is below the area's typical annual median of 53.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Oakland
The latest EPA AirNow observation puts Oakland's AQI at 37 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Oakland air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (San Francisco-Oakland-Hayward, CA), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.