Hawthorne, California Air Quality
Hawthorne has a median AQI of 77, earning an air quality grade of D — below-average air quality that ranks better than 1% of US cities. Air quality has remained relatively stable over the past decade. Ground-level ozone is the primary concern, typically peaking on warm sunny days due to vehicle and industrial emissions. In 2025, Hawthorne recorded 30 good air quality days (11% of monitored days) and 88 unhealthy days.
Population: 85,191 • County: Los Angeles
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Quick Facts
| Current AQI | 7 — Good |
| Air Quality Grade | D |
| Median AQI (2025) | 77 |
| vs. U.S. Cities | Better than 1% |
| Primary Pollutant | Ozone |
| Unhealthy Days/Year | 88 |
| 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
2025 Air Quality Summary
Primary Pollutant Days (2025)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Hawthorne Air Quality
What is the air quality in Hawthorne today?
The current AQI in Hawthorne is 7, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Hawthorne getting better or worse?
Air quality in Hawthorne has remained relatively stable over the past decade, with a median AQI of around 77.
What is the most common air pollutant in Hawthorne?
Ozone is the primary air pollutant in Hawthorne, responsible for the most air quality-impacted days in 2025. Ground-level ozone forms when sunlight reacts with vehicle and industrial emissions on warm days.
How many unhealthy air days does Hawthorne have per year?
In 2025, Hawthorne had 88 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 30 good days and 155 moderate days out of 274 days monitored.
What air quality grade does Hawthorne receive?
Hawthorne receives an air quality grade of D, placing it better than 1% of US cities. This grade is based on a median AQI of 77 for 2025, derived from EPA monitoring data.
Air Quality Grade
Better than 1% of US cities
Nearby Cities
Protect Your Health
With a median AQI of 77, indoor air purification is recommended
See Recommended Purifiers ↓Get AQI Alerts
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National Rankings
See how Hawthorne compares to every other US city by air quality.
Most Polluted Cities →All city rankingsRecommended Air Purifiers for Hawthorne
Based on your area's air quality (median AQI: 77), we recommend these air purifiers to help protect your health indoors.
Honeywell HPA300
Powerful workhorse for large rooms. Built to last.
- ✓Perfect room size match
- ✓Recommended for your air quality
- ✓Has 1/3 desired features
- ✓High performance
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Other Great Options
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.
Molekule Air Pro
Commercial-grade with patented PECO technology for destroying pollutants.
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 →