Median AQI
38
Good
New Jersey · County air quality · 2025
Atlantic County, New Jersey
Median AQI 38 (Good). 79.6% of monitored days rated Good, direct from EPA Air Quality System stations.
- 38
- Median AQI
- 79.6%
- Good-air days
- 0
- Unhealthy days
- 51%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Atlantic County's air is good on balance, cleaner than the median US county, a median AQI of 38 with 79.6% of 181 monitored days in the Good band, driven mainly by Ozone.
- 38
- median AQI · Good
- 79.6%
- days rated Good
- Ozone
- main pollutant
- 51%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 105.
Data updated July 2026
- Good · 144 d · 79.6%
- Moderate · 36 d · 19.9%
- USG · 1 d · 0.6%
How did Atlantic County's air break down in 2025?
Across 181 monitored days, 144 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 105 (USG).
EPA AQS →Air quality data from EPA Air Quality System (2025). 181 days monitored. Median AQI: 38 (Good).
Insights: Atlantic County, New Jersey. EPA monitors recorded a median Air Quality Index of 38 across 181 measured days in 2025, earning a Good classification and a Good health grade. Of those days, 144 (80%) fell in the Good band (AQI 0–50), 36 (20%) registered Moderate readings, and 1 (1%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 54, while the worst single-day peak hit 105 (USG). Residents averaged about 23.9 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (109 days), PM2.5 (72 days). Across the 2020–2025 trend window, good days shifted by -142 and the median AQI moved +1 points, placing the multi-year trajectory at stable. The worst single reading over the 2020–2025 window was AQI 105, usg but never Unhealthy. Nearby counties show comparable readings: Bergen (71.1% good, AQI 40); Camden (69.4% good, AQI 44); Cumberland (73.0% good, AQI 42); Gloucester (72.4% good, AQI 43); Hudson (74.7% good, AQI 41); Hunterdon (73.6% good, AQI 41).
Air Quality Summary
Good Days
79.6%
144 of 181 monitored days
4.6pp vs 75% target
Max AQI Recorded
105
USG
Health Grade
Good
90th-pct AQI 54
Atlantic County, Good days share 79.6%
National avg
Share of monitored days at AQI 0-50 (Good band).
Atlantic County, Unhealthy-or-worse share 0.0%
National avg
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
AQI Day Breakdown (2025)
Distribution of 181 monitored days across EPA AQI categories.
Good
144
80%
Moderate
36
20%
USG
1
1%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Atlantic County.
- Ozone · 109 days · 60.2%
- PM2.5 · 72 days · 39.8%
Health Impact Assessment
Good
Atlantic County's air quality is rated Good based on 79.6% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 79.6% of monitored days in 2025, with a median AQI of 38. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 109 of 181 monitored days.
5-Year Air Quality Trend
Air quality is stable in Atlantic County. Best year: 2022 (316 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 286 | 73 | 0 | 0 | 37 | 90 |
| 2021 | 290 | 72 | 0 | 0 | 37 | 96 |
| 2022 | 316 | 48 | 0 | 1 | 36 | 185 |
| 2023 | 270 | 90 | 3 | 1 | 38 | 265 |
| 2024 | 302 | 64 | 0 | 0 | 35 | 97 |
| 2025 | 144 | 36 | 1 | 0 | 38 | 105 |
How does Atlantic County compare?
How Atlantic County compares
Good-day share better than US avg
Atlantic County 79.6%
Bergen County, New Jersey 71.1%
US average 76.5%
Median AQI about average
Atlantic County 38
Bergen County, New Jersey 40
US average 38
Unhealthy days / yr about average
Atlantic County 0
Bergen County, New Jersey 0
US average 0
Other Counties in New Jersey
Air quality comparison for nearby counties in New Jersey.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Atlantic County.
Adams County, Illinois
AQI 38 · 94.4% good
Anoka County, Minnesota
AQI 38 · 82.1% good
Avery County, North Carolina
AQI 38 · 93.9% good
Barnstable County, Massachusetts
AQI 38 · 92.5% good
Bay County, Michigan
AQI 38 · 71.8% good
Becker County, Minnesota
AQI 38 · 84.7% good
What Atlantic County's air means for you
The air here stays in the breathable range year-round, with Ozone the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-Ozone days, the guide explains what a median of 38 means for exposure. Health guidance
- See how Atlantic County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Atlantic County with its New Jersey neighbours before drawing a conclusion about the region. All of New Jersey
Based on 181 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
More Air Quality Data
Air Quality Guides
Frequently Asked Questions
What is the air quality in Atlantic County, New Jersey? ▼
Atlantic County has a median Air Quality Index (AQI) of 38, rated "Good." 79.6% of monitored days (144 out of 181) had good air quality in 2025.
What is the main pollutant in Atlantic County? ▼
The primary pollutant in Atlantic County is Ozone (O3), which was the main AQI driver on 109 days (60% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Atlantic County have? ▼
In 2025, Atlantic County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 105.
Is the air quality in Atlantic County getting better or worse? ▼
Air quality in Atlantic County is stable based on 5-year trends (2020-2025). Best year: 2022 with 316 good days. Worst year: 2025 with 144 good days.
What does AQI 38 mean for health? ▼
Atlantic County's median AQI of 38 falls in the "Good" category. See the <a href="/guides/understanding-aqi" class="underline">AQI category guide</a> for what each range means for health.
How does Atlantic County compare to other counties in New Jersey? ▼
Atlantic County has 79.6% good air days. Nearby counties in New Jersey: Bergen (71.1% good), Camden (69.4% good), Cumberland (73.0% good), Gloucester (72.4% good), Hudson (74.7% good), Hunterdon (73.6% good).
What is the 90th percentile AQI in Atlantic County? ▼
The 90th percentile AQI for Atlantic County is 54, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 105 (USG).
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer.
Every figure on PlainAir is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.