Shell Ridge, California Air Quality
Shell Ridge has a median AQI of 48, earning an air quality grade of B+ — good air quality that ranks better than 18% 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, Shell Ridge recorded 193 good air quality days (53% of monitored days).
Population: 746 • County: Contra Costa
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Quick Facts
| Current AQI | 25 — Good |
| Air Quality Grade | B+ |
| Median AQI (2024) | 48 |
| vs. U.S. Cities | Better than 18% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 0 |
| 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 Shell Ridge Air Quality
What is the air quality in Shell Ridge today?
The current AQI in Shell Ridge is 25, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Shell Ridge getting better or worse?
Air quality in Shell Ridge has remained relatively stable over the past decade, with a median AQI of around 48.
What is the most common air pollutant in Shell Ridge?
PM2.5 is the primary air pollutant in Shell Ridge, 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 Shell Ridge have per year?
In 2024, Shell Ridge had 0 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 193 good days and 168 moderate days out of 361 days monitored.
What air quality grade does Shell Ridge receive?
Shell Ridge receives an air quality grade of B+, placing it better than 18% of US cities. This grade is based on a median AQI of 48 for 2024, derived from EPA monitoring data.
Air Quality Grade
Better than 18% of US cities
Nearby Cities
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National Rankings
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Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Shell Ridge
Based on your area's air quality (median AQI: 48), we recommend these air purifiers to help protect your health indoors.
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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
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