Bell Canyon, California Air Quality
Bell Canyon has a median AQI of 50, earning an air quality grade of B+ — good air quality that ranks better than 13% 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, Bell Canyon recorded 144 good air quality days (53% of monitored days) and 8 unhealthy days.
Population: 2,177 • County: Ventura
Current AQI
Quick Facts
| Current AQI | 65 — Moderate |
| Air Quality Grade | B+ |
| Median AQI (2025) | 50 |
| vs. U.S. Cities | Better than 13% |
| Primary Pollutant | Ozone |
| Unhealthy Days/Year | 8 |
| 10-Year Trend | ↑ Improving |
| Data Source | EPA AQS (historical) · AirNow (live) |
Health Recommendation
Air quality is acceptable. However, there may be a risk for some people who are unusually sensitive to air pollution.
Unusually sensitive people should consider reducing prolonged or heavy outdoor exertion.
5-Day AQI Forecast
Last 90 Days
Current Pollutant Levels
Real-time data from EPA AirNow
Local Air Quality Context
Air quality data for Bell Canyon is sourced from the Simi Valley - Cochran Street monitoring area, located approximately 5 miles from city center. This EPA-certified station continuously tracks ground-level ozone, the primary driver of air quality alerts in this area.
Bell Canyon typically sees its worst air quality during summer afternoons when heat and sunlight drive ground-level ozone formation from vehicle and industrial emissions. Morning readings are generally 15–25 points lower than afternoon peaks. Outdoor activity is best planned for early morning on high-ozone days.
AQI Trend (10 Years)
Air Quality Days by Year
Bell Canyon Median AQI by Year
Annual EPA air quality data for Bell Canyon — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2025 | 50 | 144 | 8 | 131 | Ozone |
| 2024 | 50 | 191 | 15 | 176 | Ozone |
| 2023 | 46 | 220 | 12 | 136 | Ozone |
| 2022 | 52 | 171 | 11 | 140 | Ozone |
| 2021 | 53 | 157 | 10 | 122 | Ozone |
| 2020 | 50 | 185 | 26 | 174 | Ozone |
| 2019 | 51 | 175 | 9 | 126 | Ozone |
| 2018 | 57 | 94 | 17 | 166 | PM2.5 |
| 2017 | 57 | 117 | 33 | 961 | PM2.5 |
| 2016 | 56 | 120 | 9 | 147 | PM2.5 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
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 Bell Canyon Air Quality
What is the air quality in Bell Canyon today?
The current AQI in Bell Canyon is 65, rated "Moderate". Air quality is moderate — unusually sensitive individuals may want to limit prolonged outdoor exertion. Air quality is acceptable. However, there may be a risk for some people who are unusually sensitive to air pollution.
Is air quality in Bell Canyon getting better or worse?
Air quality in Bell Canyon has been improving. The median AQI has dropped 6 points (from 56 in 2016 to 50 in 2025), a positive trend for residents.
What is the most common air pollutant in Bell Canyon?
Ozone is the primary air pollutant in Bell Canyon, responsible for 160 days (59% of monitored days) in 2025. Ground-level ozone forms when sunlight reacts with emissions from vehicles and industry, typically peaking on hot summer afternoons.
How many unhealthy air days does Bell Canyon have per year?
In 2025, Bell Canyon recorded 53% good air quality days (144 days) out of 273 monitored days. There were 8 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 131.
What air quality grade does Bell Canyon receive?
Bell Canyon receives an air quality grade of B+, placing it better than 13% of US cities. This is based on a median AQI of 50 in 2025, with 144 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 13% of US cities
Nearby Cities
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National Rankings
See how Bell Canyon compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Bell Canyon
Bell Canyon has a summer ozone problem — hot afternoons push AQI into Moderate or higher as sunlight converts vehicle and industrial emissions into ground-level ozone. Activated carbon and PECO filters chemically neutralize ozone rather than just trapping particles.
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