Stockton Air Quality in 2024
In 2024, Stockton's air quality (Stockton-Lodi, CA area) had a median daily AQI of 51 (Moderate) across 366 monitored days. 11 days (3.0%) reached Unhealthy for Sensitive Groups or worse, 178 were Good, and the year's peak AQI was 140 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 215 of those days. The cleanest month of 2024 was March (median AQI 37, 0 days above 100) and the worst was December (median 70, 6 days above 100, peak 129).
- Good: 48.6%
- Moderate: 48.4%
- Unhealthy for Sensitive Groups: 3.0%
- Unhealthy or worse: 0.0%
Extra Protection for Stockton Homes
Air quality in Stockton is moderate (AQI 60), with particle pollution the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
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How was Stockton's air quality in 2024?
Moderate on a typical day: median AQI 51, with 11 days above AQI 100 out of 366 monitored — the 4th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2024: 140 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 215 days.
- ✓Cleanest month: March; worst: December.
Frequently asked questions
What was the average AQI in Stockton in 2024?▾
EPA's Air Quality System puts Stockton's (Stockton-Lodi, CA) median daily AQI for 2024 at 51, which is Moderate. 11 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 140.
Which month had the worst air quality in Stockton in 2024?▾
The cleanest month of 2024 was March (median AQI 37, 0 days above 100) and the worst was December (median 70, 6 days above 100, peak 129).
Was 2024 a good or bad year for Stockton's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 4th cleanest by days above AQI 100. 2024's median of 51 is above the area's typical annual median of 48.
Stockton month by month in 2024
Stockton air quality month by month, 2024 (Stockton-Lodi, CA, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 55 | 0 | 79 | PM2.5 |
| February | 29 | 44 | 0 | 86 | PM2.5 |
| Marchcleanest | 31 | 37 | 0 | 56 | O3 |
| April | 30 | 43 | 0 | 61 | PM2.5 |
| May | 31 | 44 | 0 | 56 | O3 |
| June | 30 | 54 | 0 | 90 | PM2.5 |
| July | 31 | 56 | 1 | 122 | O3 |
| August | 31 | 53 | 1 | 101 | O3 |
| September | 30 | 51 | 1 | 112 | O3 |
| October | 31 | 52 | 1 | 140 | PM2.5 |
| November | 30 | 59 | 1 | 103 | PM2.5 |
| Decemberworst | 31 | 70 | 6 | 129 | PM2.5 |
How 2024 compares
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 4th cleanest by days above AQI 100.
2024's median of 51 is above the area's typical annual median of 48.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Stockton
The latest EPA AirNow observation puts Stockton's AQI at 60 (PM10). The figures above are multi-year annual statistics, not today's reading.
View current Stockton air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Stockton-Lodi, CA), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.