Metro area air quality · 2025
Harrisonburg, VA
Median AQI 39 (Good). 80.0% of monitored days rated Good across this metro's EPA monitoring network.
- 39
- Median AQI
- 80.0%
- Good-air days
- 0
- Unhealthy days
- 68%
- Cleaner than US metros
Harrisonburg, VA posted a 2025 median AQI of 39 (Good) with 80.0% Good days
According to the U.S. EPA Air Quality System, the Harrisonburg, VA CBSA recorded a median AQI of 39 across 365 monitored days in 2025, with 80.0% 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 Harrisonburg, VA CBSA's 80.0% Good-day share places it cleaner than 68% of US metros in 2025.
- Closest median-AQI peer
- Bay City, MI (70.4% Good, median AQI 39) is the closest nationwide median-AQI peer to Harrisonburg, VA.
- 2020–2025 Good-day shift
- Harrisonburg, VA's Good-day share moved -14.8 points from 2020 to 2025 (median AQI +6).
- Median AQI
- Median AQI: 39
Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →
The verdict
Harrisonburg, VA's peak reading 80 stays in the lower max-AQI tercile on this extract. On the EPA scale the metro runs good, cleaner than the median US metro, with a median AQI of 39 and 80.0% of 365 monitored days in the Good band.
- 39
- median AQI · Good
- 80.0%
- days rated Good
- 68%
- cleaner than US metros
- 80
- 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
- Harrisonburg, VA metro's Good-day share rose from 77.3% to 80.0% between the 2024 and 2025 EPA annual releases, a change of +2.7 percentage points.
- Harrisonburg, VA metro's median AQI fell from 42 to 39 between the 2024 and 2025 EPA annual releases, a change of -3 points.
Harrisonburg, VA's peak reading 80 stays in the lower max-AQI tercile on this extract. Signature read: peak AQI 80 (low tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 39 over 365 measured days in 2025 (Good / Good). The monitored-day split lands at 292 Good (80%), 73 Moderate (20%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 56; the highest single-day reading hit 80 (Moderate).
Across 2020–2025, Good-day share shifted -14.8 points and median AQI moved +6 (worsening). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Bay City, MI (70.4% good, AQI 39); Brainerd, MN (74.3% good, AQI 39); Cambridge, MD (86.0% good, AQI 39).
Air Quality Summary
Median AQI
39
Good
Good Days
80.0%
292 of 365 days
Max AQI
80
Moderate
Health Grade
Good
90th pct: 56
AQI Day Breakdown (2025)
Distribution of 365 monitored days across EPA AQI categories.
Good
292
80%
Moderate
73
20%
USG
0
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Harrisonburg, VA metro area's air quality is rated Good based on 80.0% 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 Harrisonburg, VA metro compare?
How Harrisonburg, VA compares
5-Year Air Quality Trend
Air quality is worsening in the Harrisonburg, VA metro. Highest Good-day share: 2020 (94.8%, 344 of 363 monitored days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 344 | 19 | 0 | 33 | 77 |
| 2021 | 316 | 47 | 0 | 36 | 87 |
| 2022 | 332 | 33 | 0 | 34 | 74 |
| 2023 | 322 | 40 | 1 | 37 | 168 |
| 2024 | 283 | 83 | 0 | 42 | 83 |
| 2025 | 292 | 73 | 0 | 39 | 80 |
Metros with a similar median AQI
CBSA peers nationwide whose annual median AQI sits near Harrisonburg, VA (39).
Bay City, MI
Median AQI 39 · 70.4% Good-day share
Brainerd, MN
Median AQI 39 · 74.3% Good-day share
Cambridge, MD
Median AQI 39 · 86.0% Good-day share
Charleston, WV
Median AQI 39 · 77.0% Good-day share
Dalton, GA
Median AQI 39 · 90.3% Good-day share
Indiana, PA
Median AQI 39 · 74.8% Good-day share
Metros with similar unhealthy-day exposure
A second relationship type: metros whose unhealthy-or-worse day count is closest to Harrisonburg, VA'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
What is the 90th percentile AQI for Harrisonburg, VA? ▼
How many unhealthy air days does Harrisonburg, VA have? ▼
What is the air quality in the Harrisonburg, VA metro area? ▼
Is air quality in Harrisonburg, VA getting better or worse? ▼
What does AQI 39 mean for health? ▼
How does Harrisonburg, VA compare to other metro areas? ▼
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Harrisonburg, VA, 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, Harrisonburg, VA · 2020–2025