Metro area air quality · 2025

Atlantic City-Hammonton, NJ

Median AQI 36 (Good). 82.2% of monitored days rated Good across this metro's EPA monitoring network.

36
Median AQI
82.2%
Good-air days
0
Unhealthy days
72%
Cleaner than US metros

Atlantic City-Hammonton, NJ posted a 2025 median AQI of 36 (Good) with 82.2% Good days

According to the U.S. EPA Air Quality System, the Atlantic City-Hammonton, NJ CBSA recorded a median AQI of 36 across 365 monitored days in 2025, with 82.2% rated Good and 0 unhealthy or worse. This is an annual metro comparison, not a live advisory.

Data source EPA Air Quality System (AQS)

Cleaner than US metros
The Atlantic City-Hammonton, NJ CBSA's 82.2% Good-day share places it cleaner than 72% of US metros in 2025.
Closest median-AQI peer
Barnstable Town, MA (93.7% Good, median AQI 36) is the closest nationwide median-AQI peer to Atlantic City-Hammonton, NJ.
2020–2025 Good-day shift
Atlantic City-Hammonton, NJ's Good-day share moved +2.8 points from 2020 to 2025 (median AQI -1).
Median AQI
Median AQI: 36

Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →

The verdict

The Atlantic City-Hammonton, NJ metro runs good on the EPA scale, cleaner than the median US metro, a median AQI of 36 with 82.2% of 365 monitored days in the Good band.

36
median AQI · Good
82.2%
days rated Good
72%
cleaner than US metros
105
worst single reading

No day crossed into the Unhealthy tier across the metro's monitors in 2025.

Insights: Atlantic City-Hammonton, NJ metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 36 over 365 measured days in 2025, which corresponds to a Good band and a Good metro-wide health grade. The monitored-day split lands at 300 Good days (82%), 64 Moderate (18%), and 1 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 54 while the highest single-day reading hit 105 (USG). Metro residents averaged roughly 24.7 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, the share of monitored days rated Good shifted by +2.8 points and the median AQI moved -1 points, which classifies the multi-year trajectory as stable. The metro recorded no Unhealthy-tier days in this annual dataset. Metros with comparable AQI profiles include Barnstable Town, MA (93.7% good, AQI 36); Bemidji, MN (79.1% good, AQI 36); Claremont-Lebanon, NH-VT (83.6% good, AQI 36).

Air Quality Summary

Median AQI

36

Good

Good Days

82.2%

300 of 365 days

Max AQI

105

USG

Health Grade

Good

90th pct: 54

AQI Day Breakdown (2025)

Distribution of 365 monitored days across EPA AQI categories.

Good

300

82%

Moderate

64

18%

USG

1

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Good

The Atlantic City-Hammonton, NJ metro area's air quality is rated Good based on 82.2% good air days. No unhealthy air days were recorded in 2025.

Air quality is generally acceptable. Unusually sensitive people should monitor real-time conditions at AirNow.gov during high-pollution events.

How does the Atlantic City-Hammonton, NJ metro compare?

How Atlantic City-Hammonton, NJ compares

Good-day share better than typical
Atlantic City-Hammonton, NJ 82.2%
Barnstable Town, MA 93.7%
Typical US metro 70.6%
Median AQI better than typical
Atlantic City-Hammonton, NJ 36
Barnstable Town, MA 36
Typical US metro 41
Unhealthy days / yr better than typical
Atlantic City-Hammonton, NJ 0
Barnstable Town, MA 0
Typical US metro 1

5-Year Air Quality Trend

Air quality is stable in the Atlantic City-Hammonton, NJ metro. Highest Good-day share: 2022 (86.6%, 316 of 365 monitored days).

Year Good Moderate Unhealthy Median AQI
2020 286 73 0 37
2021 290 72 0 37
2022 316 48 1 36
2023 270 90 1 38
2024 302 64 0 35
2025 300 64 0 36

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Atlantic City-Hammonton, NJ (36).

Barnstable Town, MA

Median AQI 36 · 93.7% Good-day share

36

Bemidji, MN

Median AQI 36 · 79.1% Good-day share

36

Claremont-Lebanon, NH-VT

Median AQI 36 · 83.6% Good-day share

36

Crestview-Fort Walton Beach-Destin, FL

Median AQI 36 · 93.9% Good-day share

36

East Stroudsburg, PA

Median AQI 36 · 88.3% Good-day share

36

Jackson, TN

Median AQI 36 · 74.3% Good-day share

36

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Atlantic City-Hammonton, NJ's 0 (independent of median AQI).

Aberdeen, SD

0 unhealthy-or-worse days · median AQI 27

27

Aberdeen, WA

0 unhealthy-or-worse days · median AQI 22

22

Adrian, MI

0 unhealthy-or-worse days · median AQI 41

41

Akron, OH

0 unhealthy-or-worse days · median AQI 45

45

Albany, GA

0 unhealthy-or-worse days · median AQI 46

46

Albany, OR

0 unhealthy-or-worse days · median AQI 27

27

More Air Quality Data

Explore EPA air quality rankings and guides across U.S. metros and counties.

Cleanest Metro Areas

U.S. metros ranked by their share of Good air-quality days.

Worst Air Quality

Counties and metros with the most unhealthy air days.

All Metro Areas

Annual AQI by CBSA for every monitored U.S. metro area.

Best and Worst City Air

What drives urban air quality and how metro areas compare.

Air Quality Guides

Frequently Asked Questions

What is the air quality in the Atlantic City-Hammonton, NJ metro area? ▼
The Atlantic City-Hammonton, NJ metro area has a median Air Quality Index (AQI) of 36, rated "Good." 82.2% of monitored days (300 out of 365) had good air quality in 2025.
How many unhealthy air days does Atlantic City-Hammonton, NJ have? ▼
In 2025, the Atlantic City-Hammonton, NJ metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 105.
Is air quality in Atlantic City-Hammonton, NJ getting better or worse? ▼
Air quality in the Atlantic City-Hammonton, NJ metro is stable across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2022 at 86.6% (316 of 365 days). Lowest qualifying Good-day share: 2023 at 74.8% (270 of 361 days).
What does AQI 36 mean for health? ▼
An AQI of 36 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.
What is the 90th percentile AQI for Atlantic City-Hammonton, NJ? ▼
The 90th percentile AQI for the Atlantic City-Hammonton, NJ metro area is 54, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 105 (USG).
How does Atlantic City-Hammonton, NJ compare to other metro areas? ▼
The Atlantic City-Hammonton, NJ metro has 82.2% good air days. Similar metros: Barnstable Town, MA (93.7% good), Bemidji, MN (79.1% good), Claremont-Lebanon, NH-VT (83.6% good).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2025. See our methodology for how AQI, median, and coverage figures are computed.

Read our methodology , how this data is sourced, computed, and verified.

Source: U.S. EPA Air Quality System (AQS) Annual AQI by CBSA summary files (metro-level) · 2020–2025

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Every figure on PlainAirData 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.