Metro area air quality · 2025
Lebanon, PA
Median AQI 42 (Good). 64.4% of monitored days rated Good across this metro's EPA monitoring network.
- 42
- Median AQI
- 64.4%
- Good-air days
- 0
- Unhealthy days
- 33%
- Cleaner than US metros
Lebanon, PA posted a 2025 median AQI of 42 (Good) with 64.4% Good days
According to the U.S. EPA Air Quality System, the Lebanon, PA CBSA recorded a median AQI of 42 across 365 monitored days in 2025, with 64.4% 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 Lebanon, PA CBSA's 64.4% Good-day share places it cleaner than 33% 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 Lebanon, PA.
- 2020–2025 Good-day shift
- Lebanon, PA's Good-day share moved -3.9 points from 2020 to 2025 (median AQI +1).
- Median AQI
- Median AQI: 42
Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →
The verdict
Lebanon, PA lands in the lower Good-day tercile (64.4% Good), a thinner clean-air share than most CBSA peers here. On the EPA scale the metro runs good, more polluted than the median US metro, with a median AQI of 42 and 64.4% of 365 monitored days in the Good band.
- 42
- median AQI · Good
- 64.4%
- days rated Good
- 33%
- cleaner than US metros
- 108
- 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
- Lebanon, PA metro's Good-day share fell from 66.5% to 64.7% between the 2024 and 2025 EPA annual releases, a change of -1.7 percentage points.
Lebanon, PA lands in the lower Good-day tercile (64.4% Good), a thinner clean-air share than most CBSA peers here. Signature read: 64.4% Good-day share (low tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 42 over 365 measured days in 2025 (Good / Moderate). The monitored-day split lands at 235 Good (64%), 128 Moderate (35%), and 2 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 65; the highest single-day reading hit 108 (USG).
Across 2020–2025, Good-day share shifted -3.9 points and median AQI moved +1 (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
64.4%
235 of 365 days
Max AQI
108
USG
Health Grade
Moderate
90th pct: 65
AQI Day Breakdown (2025)
Distribution of 365 monitored days across EPA AQI categories.
Good
235
64%
Moderate
128
35%
USG
2
1%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Lebanon, PA metro area's air quality is rated Moderate based on 64.4% 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 Lebanon, PA metro compare?
How Lebanon, PA compares
5-Year Air Quality Trend
Air quality is worsening in the Lebanon, PA metro. Highest Good-day share: 2020 (68.6%, 116 of 169 monitored days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 116 | 53 | 0 | 41 | 115 |
| 2021 | 197 | 166 | 0 | 49 | 117 |
| 2022 | 224 | 138 | 0 | 46 | 108 |
| 2023 | 204 | 151 | 3 | 47 | 265 |
| 2024 | 242 | 122 | 0 | 43 | 108 |
| 2025 | 235 | 128 | 0 | 42 | 108 |
Metros with a similar median AQI
CBSA peers nationwide whose annual median AQI sits near Lebanon, PA (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 Lebanon, PA'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 Lebanon, PA have? ▼
What is the air quality in the Lebanon, PA metro area? ▼
Is air quality in Lebanon, PA getting better or worse? ▼
What does AQI 42 mean for health? ▼
How does Lebanon, PA compare to other metro areas? ▼
What is the 90th percentile AQI for Lebanon, PA? ▼
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Lebanon, PA, 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, Lebanon, PA · 2020–2025