Metro area air quality · 2025

Jamestown-Dunkirk-Fredonia, NY

Median AQI 36 (Good). 89.0% of monitored days rated Good across this metro's EPA monitoring network.

36
Median AQI
89.0%
Good-air days
0
Unhealthy days
84%
Cleaner than US metros

Jamestown-Dunkirk-Fredonia, NY posted a 2025 median AQI of 36 (Good) with 89.0% Good days

According to the U.S. EPA Air Quality System, the Jamestown-Dunkirk-Fredonia, NY CBSA recorded a median AQI of 36 across 356 monitored days in 2025, with 89.0% 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 Jamestown-Dunkirk-Fredonia, NY CBSA's 89.0% Good-day share places it cleaner than 84% of US metros in 2025.
Closest median-AQI peer
Atlantic City-Hammonton, NJ (82.2% Good, median AQI 36) is the closest nationwide median-AQI peer to Jamestown-Dunkirk-Fredonia, NY.
2020–2025 Good-day shift
Jamestown-Dunkirk-Fredonia, NY's Good-day share moved -2.2 points from 2020 to 2025 (median AQI +0).
Median AQI
Median AQI: 36

Aggregated from EPA Air Quality System (2025), 356 monitored days. EPA AQS →

The verdict

Jamestown-Dunkirk-Fredonia, NY sits in the upper Good-day tercile among EPA CBSA metros on this site (89.0% of 356 monitored days). On the EPA scale the metro runs good, cleaner than most US metros, with a median AQI of 36 and 89.0% of 356 monitored days in the Good band.

36
median AQI · Good
89.0%
days rated Good
84%
cleaner than US metros
108
worst single reading

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

Jamestown-Dunkirk-Fredonia, NY sits in the upper Good-day tercile among EPA CBSA metros on this site (89.0% of 356 monitored days). Signature read: 89.0% 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 356 measured days in 2025 (Good / Good). The monitored-day split lands at 317 Good (89%), 38 Moderate (11%), and 1 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 52; the highest single-day reading hit 108 (USG).

Across 2020–2025, Good-day share shifted -2.2 points and median AQI moved +0 (stable). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Atlantic City-Hammonton, NJ (82.2% good, AQI 36); Barnstable Town, MA (93.7% good, AQI 36); Bemidji, MN (79.1% good, AQI 36).

Best and worst city air quality →

Air Quality Summary

Median AQI

36

Good

Good Days

89.0%

317 of 356 days

Max AQI

108

USG

Health Grade

Good

90th pct: 52

AQI Day Breakdown (2025)

Distribution of 356 monitored days across EPA AQI categories.

Good

317

89%

Moderate

38

11%

USG

1

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Good

The Jamestown-Dunkirk-Fredonia, NY metro area's air quality is rated Good based on 89.0% 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 Jamestown-Dunkirk-Fredonia, NY metro compare?

How Jamestown-Dunkirk-Fredonia, NY compares

Good-day share better than typical
Jamestown-Dunkirk-Fredonia, NY 89.0%
Atlantic City-Hammonton, NJ 82.2%
Typical US metro 70.6%
Median AQI better than typical
Jamestown-Dunkirk-Fredonia, NY 36
Atlantic City-Hammonton, NJ 36
Typical US metro 41
Unhealthy days / yr better than typical
Jamestown-Dunkirk-Fredonia, NY 0
Atlantic City-Hammonton, NJ 0
Typical US metro 1

5-Year Air Quality Trend

Air quality is stable in the Jamestown-Dunkirk-Fredonia, NY metro. Highest Good-day share: 2022 (91.7%, 322 of 351 monitored days).

Year Good Moderate Unhealthy Median AQI
2020 332 31 0 36
2021 300 60 0 38
2022 322 29 0 36
2023 322 36 0 37
2024 326 36 0 36
2025 317 38 0 36

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Jamestown-Dunkirk-Fredonia, NY (36).

Atlantic City-Hammonton, NJ

Median AQI 36 · 82.2% Good-day share

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

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Jamestown-Dunkirk-Fredonia, NY'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 Jamestown-Dunkirk-Fredonia, NY have? ▼
In 2025, the Jamestown-Dunkirk-Fredonia, NY metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 108.
What is the air quality in the Jamestown-Dunkirk-Fredonia, NY metro area? ▼
The Jamestown-Dunkirk-Fredonia, NY metro area has a median Air Quality Index (AQI) of 36, rated "Good." 89.0% of monitored days (317 out of 356) had good air quality in 2025.
Is air quality in Jamestown-Dunkirk-Fredonia, NY getting better or worse? ▼
Air quality in the Jamestown-Dunkirk-Fredonia, NY 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 91.7% (322 of 351 days). Lowest qualifying Good-day share: 2021 at 83.3% (300 of 360 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 Jamestown-Dunkirk-Fredonia, NY compare to other metro areas? ▼
The Jamestown-Dunkirk-Fredonia, NY metro has 89.0% good air days. Similar metros: Atlantic City-Hammonton, NJ (82.2% good), Barnstable Town, MA (93.7% good), Bemidji, MN (79.1% good).
What is the 90th percentile AQI for Jamestown-Dunkirk-Fredonia, NY? ▼
The 90th percentile AQI for the Jamestown-Dunkirk-Fredonia, NY metro area is 52, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 108 (USG).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Jamestown-Dunkirk-Fredonia, NY, 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, Jamestown-Dunkirk-Fredonia, NY · 2020–2025