Berkeley, California Air Quality
Berkeley has a median AQI of 49, earning an air quality grade of B+ — good air quality that ranks better than 16% of US cities. Air quality has remained relatively stable over the past decade. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2024, Berkeley recorded 194 good air quality days (53% of monitored days) and 1 unhealthy days.
Population: 120,257 • County: Alameda
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Quick Facts
| Current AQI | 23 — Good |
| Air Quality Grade | B+ |
| Median AQI (2024) | 49 |
| vs. U.S. Cities | Better than 16% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 1 |
| 10-Year Trend | → Stable |
| Data Source | EPA AirNow |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 30 Days
Current Pollutant Levels
Real-time data from EPA AirNow
AQI Trend (10 Years)
Air Quality Days by Year
2024 Air Quality Summary
Primary Pollutant Days (2024)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Berkeley Air Quality
What is the air quality in Berkeley today?
The current AQI in Berkeley is 23, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Berkeley getting better or worse?
Air quality in Berkeley has remained relatively stable over the past decade, with a median AQI of around 49.
What is the most common air pollutant in Berkeley?
PM2.5 is the primary air pollutant in Berkeley, responsible for the most air quality-impacted days in 2024. Particulate matter can originate from vehicle exhaust, wildfires, and industrial emissions.
How many unhealthy air days does Berkeley have per year?
In 2024, Berkeley had 1 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 194 good days and 171 moderate days out of 366 days monitored.
What air quality grade does Berkeley receive?
Berkeley receives an air quality grade of B+, placing it better than 16% of US cities. This grade is based on a median AQI of 49 for 2024, derived from EPA monitoring data.
Air Quality Grade
Better than 16% of US cities
Nearby Cities
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National Rankings
See how Berkeley compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Berkeley
Based on your area's air quality (median AQI: 49), we recommend these air purifiers to help protect your health indoors.
RabbitAir MinusA2
Stylish wall-mountable design with customizable artwork panels.
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Other Great Options
Molekule Air Pro
Commercial-grade with patented PECO technology for destroying pollutants.
Blueair Blue Pure 211+
High performance for large rooms with simple operation.
Dyson Pure Cool TP04
Premium all-in-one air purifier and fan with advanced features.
Not sure which air purifier is right for you?
Learn more about different types of air purifiers and how to choose the best one for your needs.
Read our complete buying guide →