Creston, California Air Quality
Creston has a median AQI of 51, earning an air quality grade of B — good air quality that ranks better than 11% of US cities. Air quality has been improving steadily over the past decade, a positive sign for residents. Ground-level ozone is the primary concern, typically peaking on warm sunny days due to vehicle and industrial emissions. In 2025, Creston recorded 120 good air quality days (44% of monitored days) and 7 unhealthy days.
0Loading AQI…
Quick Facts
| Current AQI | 12 — Good |
| Air Quality Grade | B |
| Median AQI (2025) | 51 |
| vs. U.S. Cities | Better than 11% |
| Primary Pollutant | Ozone |
| Unhealthy Days/Year | 7 |
| 10-Year Trend | ↑ Improving |
| 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 Creston Air Quality
What is the air quality in Creston today?
The current AQI in Creston is 12, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Creston getting better or worse?
Air quality in Creston has been improving over the past decade. The median AQI dropped from 55 in 2016 to 51 in 2025.
What is the most common air pollutant in Creston?
Ozone is the primary air pollutant in Creston, 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 Creston have per year?
In 2025, Creston had 7 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 120 good days and 146 moderate days out of 273 days monitored.
What air quality grade does Creston receive?
Creston receives an air quality grade of B, placing it better than 11% of US cities. This grade is based on a median AQI of 51 for 2025, derived from EPA monitoring data.
Air Quality Grade
Better than 11% of US cities
Nearby Cities
Protect Your Health
With a median AQI of 51, indoor air purification is recommended
See Recommended Purifiers ↓Get AQI Alerts
Receive notifications when air quality changes in Creston
National Rankings
See how Creston compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Creston
Based on your area's air quality (median AQI: 51), 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
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Other Great Options
Blueair Blue Pure 211+
High performance for large rooms with simple operation.
RabbitAir MinusA2
Stylish wall-mountable design with customizable artwork panels.
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 →