Metro area air quality · 2025

Clarksburg, WV

Median AQI 33 (Good). 72.4% of monitored days rated Good across this metro's EPA monitoring network.

33
Median AQI
72.4%
Good-air days
0
Unhealthy days
51%
Cleaner than US metros

Clarksburg, WV posted a 2025 median AQI of 33 (Good) with 72.4% Good days

According to the U.S. EPA Air Quality System, the Clarksburg, WV CBSA recorded a median AQI of 33 across 116 monitored days in 2025, with 72.4% 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 Clarksburg, WV CBSA's 72.4% Good-day share places it cleaner than 51% of US metros in 2025.
Closest median-AQI peer
Bangor, ME (84.2% Good, median AQI 33) is the closest nationwide median-AQI peer to Clarksburg, WV.
2020–2025 Good-day shift
Clarksburg, WV's Good-day share moved -11.5 points from 2020 to 2025 (median AQI -2).
Median AQI
Median AQI: 33

Aggregated from EPA Air Quality System (2025), 116 monitored days. EPA AQS →

The verdict

Clarksburg, WV's median AQI 33 is in the lower (cleaner) CBSA tercile on this site. On the EPA scale the metro runs good, cleaner than the median US metro, with a median AQI of 33 and 72.4% of 116 monitored days in the Good band.

33
median AQI · Good
72.4%
days rated Good
51%
cleaner than US metros
68
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

2024 → 2025
  • Clarksburg, WV metro's Good-day share fell from 80.5% to 72.4% between the 2024 and 2025 EPA annual releases, a change of -8.1 percentage points.

Compared against 113 monitored days in 2024 and 116 in 2025. These are arithmetic differences between two stored EPA annual summaries, not a cause claim or a live advisory.

National release changes Two-year CSV

Clarksburg, WV's median AQI 33 is in the lower (cleaner) CBSA tercile on this site. Signature read: median AQI 33 (low tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 33 over 116 measured days in 2025 (Good / Moderate). The monitored-day split lands at 84 Good (72%), 32 Moderate (28%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 55; the highest single-day reading hit 68 (Moderate).

Across 2020–2025, Good-day share shifted -11.5 points and median AQI moved -2 (worsening). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Bangor, ME (84.2% good, AQI 33); Grants Pass, OR (68.2% good, AQI 33); Lawrenceburg, TN (81.5% good, AQI 33).

Understanding AQI →

Air Quality Summary

Median AQI

33

Good

Good Days

72.4%

84 of 116 days

Max AQI

68

Moderate

Health Grade

Moderate

90th pct: 55

AQI Day Breakdown (2025)

Distribution of 116 monitored days across EPA AQI categories.

Good

84

72%

Moderate

32

28%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Moderate

The Clarksburg, WV metro area's air quality is rated Moderate based on 72.4% 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 Clarksburg, WV metro compare?

How Clarksburg, WV compares

Good-day share better than typical
Clarksburg, WV 72.4%
Bangor, ME 84.2%
Typical US metro 70.6%
Median AQI better than typical
Clarksburg, WV 33
Bangor, ME 33
Typical US metro 41
Unhealthy days / yr better than typical
Clarksburg, WV 0
Bangor, ME 1
Typical US metro 1

5-Year Air Quality Trend

Air quality is worsening in the Clarksburg, WV metro. Highest Good-day share: 2020 (83.9%, 99 of 118 monitored days).

Year Good Moderate Unhealthy Median AQI
2020 99 19 0 35
2021 82 33 0 35
2022 93 20 0 34
2023 82 24 1 39
2024 91 22 0 34
2025 84 32 0 33

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Clarksburg, WV (33).

Bangor, ME

Median AQI 33 · 84.2% Good-day share

33

Grants Pass, OR

Median AQI 33 · 68.2% Good-day share

33

Lawrenceburg, TN

Median AQI 33 · 81.5% Good-day share

33

Roanoke Rapids, NC

Median AQI 33 · 78.1% Good-day share

33

Rockland, ME

Median AQI 33 · 97.8% Good-day share

33

Vallejo-Fairfield, CA

Median AQI 33 · 99.2% Good-day share

33

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Clarksburg, WV'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

What does AQI 33 mean for health? ▼
An AQI of 33 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 many unhealthy air days does Clarksburg, WV have? ▼
In 2025, the Clarksburg, WV metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 68.
What is the air quality in the Clarksburg, WV metro area? ▼
The Clarksburg, WV metro area has a median Air Quality Index (AQI) of 33, rated "Good." 72.4% of monitored days (84 out of 116) had good air quality in 2025.
Is air quality in Clarksburg, WV getting better or worse? ▼
Air quality in the Clarksburg, WV metro is worsening across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2020 at 83.9% (99 of 118 days). Lowest qualifying Good-day share: 2021 at 71.3% (82 of 115 days).
How does Clarksburg, WV compare to other metro areas? ▼
The Clarksburg, WV metro has 72.4% good air days. Similar metros: Bangor, ME (84.2% good), Grants Pass, OR (68.2% good), Lawrenceburg, TN (81.5% good).
What is the 90th percentile AQI for Clarksburg, WV? ▼
The 90th percentile AQI for the Clarksburg, WV metro area is 55, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 68 (Moderate).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Clarksburg, WV, 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, Clarksburg, WV · 2020–2025