Metro area air quality · 2025
Athens, OH
Median AQI 31 (Good). 83.4% of monitored days rated Good across this metro's EPA monitoring network.
- 31
- Median AQI
- 83.4%
- Good-air days
- 0
- Unhealthy days
- 74%
- Cleaner than US metros
Athens, OH posted a 2025 median AQI of 31 (Good) with 83.4% Good days
According to the U.S. EPA Air Quality System, the Athens, OH CBSA recorded a median AQI of 31 across 361 monitored days in 2025, with 83.4% 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 Athens, OH CBSA's 83.4% Good-day share places it cleaner than 74% of US metros in 2025.
- Closest median-AQI peer
- Bellingham, WA (94.0% Good, median AQI 31) is the closest nationwide median-AQI peer to Athens, OH.
- 2020–2025 Good-day shift
- Athens, OH's Good-day share moved -1.5 points from 2020 to 2025 (median AQI -1).
- Median AQI
- Median AQI: 31
Aggregated from EPA Air Quality System (2025), 361 monitored days. EPA AQS →
The verdict
The Athens, OH metro runs good on the EPA scale, cleaner than the median US metro, a median AQI of 31 with 83.4% of 361 monitored days in the Good band.
- 31
- median AQI · Good
- 83.4%
- days rated Good
- 74%
- cleaner than US metros
- 75
- worst single reading
No day crossed into the Unhealthy tier across the metro's monitors in 2025.
Annual release change
What changed in the 2025 EPA annual release
- Athens, OH metro's Good-day share fell from 90.7% to 83.4% between the 2024 and 2025 EPA annual releases, a change of -7.3 percentage points.
- Athens, OH metro's peak single-day AQI rose from 64 to 75 between the 2024 and 2025 EPA annual releases, a change of +11 points.
- Athens, OH metro's median AQI rose from 28 to 31 between the 2024 and 2025 EPA annual releases, a change of +3 points.
Insights: Athens, OH metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 31 over 361 measured days in 2025, which corresponds to a Good band and a Good metro-wide health grade. The monitored-day split lands at 301 Good days (83%), 60 Moderate (17%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 54 while the highest single-day reading hit 75 (Moderate). Metro residents averaged roughly 25.0 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 -1.5 points (measured against 86 monitored days in 2020 and 361 in 2025, so raw day counts are not comparable) 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 Bellingham, WA (94.0% good, AQI 31); Clearlake, CA (99.2% good, AQI 31); Coeur d'Alene, ID (77.8% good, AQI 31).
Air Quality Summary
Median AQI
31
Good
Good Days
83.4%
301 of 361 days
Max AQI
75
Moderate
Health Grade
Good
90th pct: 54
AQI Day Breakdown (2025)
Distribution of 361 monitored days across EPA AQI categories.
Good
301
83%
Moderate
60
17%
USG
0
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Athens, OH metro area's air quality is rated Good based on 83.4% 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 Athens, OH metro compare?
How Athens, OH compares
5-Year Air Quality Trend
Air quality is stable in the Athens, OH metro. Highest Good-day share: 2024 (90.7%, 330 of 364 monitored days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 73 | 13 | 0 | 32 | 65 |
| 2021 | 91 | 22 | 0 | 27 | 77 |
| 2022 | 107 | 12 | 0 | 27 | 67 |
| 2023 | 208 | 35 | 1 | 31 | 157 |
| 2024 | 330 | 34 | 0 | 28 | 64 |
| 2025 | 301 | 60 | 0 | 31 | 75 |
Metros with a similar median AQI
CBSA peers nationwide whose annual median AQI sits near Athens, OH (31).
Bellingham, WA
Median AQI 31 · 94.0% Good-day share
Clearlake, CA
Median AQI 31 · 99.2% Good-day share
Coeur d'Alene, ID
Median AQI 31 · 77.8% Good-day share
Moscow, ID
Median AQI 31 · 83.4% Good-day share
Cookeville, TN
Median AQI 30 · 90.0% Good-day share
Crescent City, CA
Median AQI 32 · 81.8% Good-day share
Metros with similar unhealthy-day exposure
A second relationship type: metros whose unhealthy-or-worse day count is closest to Athens, OH's 0 (independent of median AQI).
Aberdeen, SD
0 unhealthy-or-worse days · median AQI 27
Aberdeen, WA
0 unhealthy-or-worse days · median AQI 22
Adrian, MI
0 unhealthy-or-worse days · median AQI 41
Akron, OH
0 unhealthy-or-worse days · median AQI 45
Albany, GA
0 unhealthy-or-worse days · median AQI 46
Albany, OR
0 unhealthy-or-worse days · median AQI 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 Athens, OH metro area? ▼
How many unhealthy air days does Athens, OH have? ▼
Is air quality in Athens, OH getting better or worse? ▼
What does AQI 31 mean for health? ▼
What is the 90th percentile AQI for Athens, OH? ▼
How does Athens, OH compare to other metro areas? ▼
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.