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

Atlantic City-Hammonton, NJ sits in the upper Good-day tercile among EPA CBSA metros on this site (82.2% of 365 monitored days). On the EPA scale the metro runs good, cleaner than the median US metro, with a median AQI of 36 and 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.

Atlantic City-Hammonton, NJ sits in the upper Good-day tercile among EPA CBSA metros on this site (82.2% of 365 monitored days). Signature read: 82.2% Good-day share (high tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 36 over 365 measured days in 2025 (Good / Good). The monitored-day split lands at 300 Good (82%), 64 Moderate (18%), and 1 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 54; the highest single-day reading hit 105 (USG).

Across 2020–2025, Good-day share shifted +2.8 points and median AQI moved -1 (stable). No Unhealthy-tier days appear 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).

Best and worst city air quality →

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

Frequently Asked Questions

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.
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.
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.
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).
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).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Atlantic City-Hammonton, NJ, 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, Atlantic City-Hammonton, NJ · 2020–2025