Stockton Air Quality in July
Across 2019–2025, Stockton's July air quality had a median AQI of 48 (Good) over 217 monitored days in the Stockton-Lodi, CA area. 0.9% of July days (2 of 217) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 67.3% of days. The cleanest July on record here was 2025 (median AQI 42, 0 days above 100) and the worst was 2024 (median 56, 1 day above 100, peak AQI 122).
- Good: 56.7%
- Moderate: 42.4%
- Unhealthy for Sensitive Groups: 0.9%
- 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.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
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How is the air in Stockton in July?
Good on a typical day: median AQI 48 across 2019–2025, with 0.9% of July days above AQI 100. Ground-level ozone is the main driver.
- ✓56.7% of July days were Good (AQI 0–50), 42.4% Moderate (51–100).
- ✓2 days of 217 reached AQI 101+; the July peak was 129.
- ✓Best July: 2025; worst July: 2024.
Frequently asked questions
What is the air quality like in Stockton in July?▾
Across 2019–2025, the median daily AQI in Stockton in July was 48 (Good). 56.7% of days were Good, 42.4% Moderate, and 0.9% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is July a good time for outdoor exercise in Stockton?▾
A typical July day in Stockton sits in the Good range (median AQI 48), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of July days reached AQI 101+ in 2019–2025.
Which pollutant causes Stockton's July air quality problems?▾
Ground-level ozone set the daily AQI on 67.3% of July days in Stockton. The highest July AQI recorded in 2019–2025 was 129 (Unhealthy for Sensitive Groups), in 2024.
Stockton July air quality, year by year
Stockton July air quality by year (Stockton-Lodi, CA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 47 | 1 | 129 | O3 |
| 2020 | 31 | 49 | 0 | 74 | PM2.5 |
| 2021 | 31 | 53 | 0 | 87 | O3 |
| 2022 | 31 | 44 | 0 | 61 | O3 |
| 2023 | 31 | 48 | 0 | 80 | O3 |
| 2024worst | 31 | 56 | 1 | 122 | O3 |
| 2025cleanest | 31 | 42 | 0 | 80 | O3 |
What July air means in Stockton
A typical July day in Stockton sits in the Good range (median AQI 48), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of July days reached AQI 101+ in 2019–2025.
July's median AQI of 48 is in line with Stockton's whole-year median of 48, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median July AQI across every EPA metro area (103,858 metro-days, 2019–2025) is 47, so Stockton runs in line with the national July norm; 0.9% of its July days topped AQI 100 versus 3.6% nationally (below average).
July is part of Stockton's summer season (June, July, August); the summer page pools all three months.
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 month 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.