Atlantic City Air Quality in Fall
Across 2019–2025, Atlantic City's fall (September–November) air quality had a median AQI of 33 (Good) over 635 monitored days in the Atlantic City-Hammonton, NJ area. 0.0% of fall days (0 of 635) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 55.7% of days. The cleanest fall on record here was 2022 (median AQI 29, 0 days above 100) and the worst was 2019 (median 36, 0 days above 100, peak AQI 58).
- Good: 88.0%
- Moderate: 12.0%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Atlantic City
Today's main pollutant in Atlantic City is ground-level ozone (AQI 31). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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How is the air in Atlantic City in fall?
Good on a typical day: median AQI 33 across 2019–2025, with 0.0% of fall days above AQI 100. Ground-level ozone is the main driver.
- ✓88.0% of fall days were Good (AQI 0–50), 12.0% Moderate (51–100).
- ✓0 days of 635 reached AQI 101+; the fall peak was 97.
- ✓Cleanest month: November; worst month: September.
Frequently asked questions
What is the air quality like in Atlantic City in fall?▾
Across 2019–2025, the median daily AQI in Atlantic City in fall was 33 (Good). 88.0% of days were Good, 12.0% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 635 monitored days in EPA's Air Quality System.
Is fall a good time for outdoor exercise in Atlantic City?▾
A typical fall day in Atlantic City sits in the Good range (median AQI 33), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of fall days reached AQI 101+ in 2019–2025.
Which pollutant causes Atlantic City's fall air quality problems?▾
Ground-level ozone set the daily AQI on 55.7% of fall days in Atlantic City. The highest fall AQI recorded in 2019–2025 was 97 (Moderate), in 2019.
Atlantic City fall air quality, year by year
Atlantic City fall air quality by year (Atlantic City-Hammonton, NJ, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 91 | 36 | 0 | 58 | O3 |
| 2020 | 90 | 35 | 0 | 74 | PM2.5 |
| 2021 | 90 | 34 | 0 | 62 | O3 |
| 2022cleanest | 91 | 29 | 0 | 53 | O3 |
| 2023 | 91 | 33 | 0 | 90 | PM2.5 |
| 2024 | 91 | 34 | 0 | 97 | O3 |
| 2025 | 91 | 32 | 0 | 56 | O3 |
What fall air means in Atlantic City
A typical fall day in Atlantic City sits in the Good range (median AQI 33), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of fall days reached AQI 101+ in 2019–2025.
Fall's median AQI of 33 is below Atlantic City's whole-year median of 37, making it one of the area's cleaner periods. Nationally, the median Fall AQI across every EPA metro area (296,275 metro-days, 2019–2025) is 40, so Atlantic City runs below the national Fall norm; 0.0% of its Fall days topped AQI 100 versus 1.5% nationally (below average).
Within the season, November is the cleanest month (median AQI 32, 0.0% of days above 100) and September the worst (median 36, 0.0% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Atlantic City
The latest EPA AirNow observation puts Atlantic City's AQI at 31 (O3). The figures above are multi-year season statistics, not today's reading.
View current Atlantic City air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Atlantic City-Hammonton, NJ), 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.