Metro area air quality · 2025
Middlesborough, KY
Median AQI 42 (Good). 67.0% of monitored days rated Good across this metro's EPA monitoring network.
- 42
- Median AQI
- 67.0%
- Good-air days
- 0
- Unhealthy days
- 39%
- Cleaner than US metros
Middlesborough, KY posted a 2025 median AQI of 42 (Good) with 67.0% Good days
According to the U.S. EPA Air Quality System, the Middlesborough, KY CBSA recorded a median AQI of 42 across 361 monitored days in 2025, with 67.0% 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 Middlesborough, KY CBSA's 67.0% Good-day share places it cleaner than 39% of US metros in 2025.
- Closest median-AQI peer
- Allentown-Bethlehem-Easton, PA-NJ (66.8% Good, median AQI 42) is the closest nationwide median-AQI peer to Middlesborough, KY.
- 2020–2025 Good-day shift
- Middlesborough, KY's Good-day share moved -24.8 points from 2020 to 2025 (median AQI +8).
- Median AQI
- Median AQI: 42
Aggregated from EPA Air Quality System (2025), 361 monitored days. EPA AQS →
The verdict
Middlesborough, KY's Good-day share (67.0%) sits in the middle CBSA tercile on this extract. On the EPA scale the metro runs good, more polluted than the median US metro, with a median AQI of 42 and 67.0% of 361 monitored days in the Good band.
- 42
- median AQI · Good
- 67.0%
- days rated Good
- 39%
- cleaner than US metros
- 101
- 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
- Middlesborough, KY metro's peak single-day AQI rose from 88 to 101 between the 2024 and 2025 EPA annual releases, a change of +13 points.
Middlesborough, KY's Good-day share (67.0%) sits in the middle CBSA tercile on this extract. Signature read: 67.0% Good-day share (mid tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 42 over 361 measured days in 2025 (Good / Moderate). The monitored-day split lands at 242 Good (67%), 118 Moderate (33%), and 1 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 59; the highest single-day reading hit 101 (USG).
Across 2020–2025, Good-day share shifted -24.8 points and median AQI moved +8 (worsening). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Allentown-Bethlehem-Easton, PA-NJ (66.8% good, AQI 42); Amarillo, TX (78.4% good, AQI 42); Carson City, NV (86.2% good, AQI 42).
Air Quality Summary
Median AQI
42
Good
Good Days
67.0%
242 of 361 days
Max AQI
101
USG
Health Grade
Moderate
90th pct: 59
AQI Day Breakdown (2025)
Distribution of 361 monitored days across EPA AQI categories.
Good
242
67%
Moderate
118
33%
USG
1
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Middlesborough, KY metro area's air quality is rated Moderate based on 67.0% 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 Middlesborough, KY metro compare?
How Middlesborough, KY compares
5-Year Air Quality Trend
Air quality is worsening in the Middlesborough, KY metro. Highest Good-day share: 2020 (92.0%, 242 of 263 monitored days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 242 | 21 | 0 | 34 | 74 |
| 2021 | 164 | 198 | 0 | 52 | 112 |
| 2022 | 197 | 168 | 0 | 48 | 91 |
| 2023 | 185 | 177 | 0 | 49 | 131 |
| 2024 | 244 | 121 | 0 | 44 | 88 |
| 2025 | 242 | 118 | 0 | 42 | 101 |
Metros with a similar median AQI
CBSA peers nationwide whose annual median AQI sits near Middlesborough, KY (42).
Allentown-Bethlehem-Easton, PA-NJ
Median AQI 42 · 66.8% Good-day share
Amarillo, TX
Median AQI 42 · 78.4% Good-day share
Carson City, NV
Median AQI 42 · 86.2% Good-day share
Casper, WY
Median AQI 42 · 86.3% Good-day share
Clarksville, TN-KY
Median AQI 42 · 72.0% Good-day share
Daphne-Fairhope-Foley, AL
Median AQI 42 · 75.5% Good-day share
Metros with similar unhealthy-day exposure
A second relationship type: metros whose unhealthy-or-worse day count is closest to Middlesborough, KY'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
Frequently Asked Questions
How many unhealthy air days does Middlesborough, KY have? ▼
What is the air quality in the Middlesborough, KY metro area? ▼
Is air quality in Middlesborough, KY getting better or worse? ▼
What does AQI 42 mean for health? ▼
How does Middlesborough, KY compare to other metro areas? ▼
What is the 90th percentile AQI for Middlesborough, KY? ▼
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Middlesborough, KY, 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, Middlesborough, KY · 2020–2025