Metro area air quality · 2025

Wabash, IN

Median AQI 37 (Good). 93.9% of monitored days rated Good across this metro's EPA monitoring network.

37
Median AQI
93.9%
Good-air days
0
Unhealthy days
91%
Cleaner than US metros

Aggregated from EPA Air Quality System (2025), 230 monitored days. EPA AQS →

The verdict

The Wabash, IN metro runs good on the EPA scale, among the cleanest 10% of US metros, a median AQI of 37 with 93.9% of 230 monitored days in the Good band.

37
median AQI · Good
93.9%
days rated Good
91%
cleaner than US metros
87
worst single reading

No day crossed into the Unhealthy tier across the metro's monitors in 2025.

Insights: Wabash, IN metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 37 over 230 measured days in 2025, which corresponds to a Good band and a Excellent metro-wide health grade. The monitored-day split lands at 216 Good days (94%), 14 Moderate (6%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 48 while the highest single-day reading hit 87 (Moderate). Metro residents averaged roughly 28.2 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -121 and the median AQI moved +2 points, which classifies the multi-year trajectory as stable. The metro avoided any Unhealthy-tier days entirely, an outcome that typically reflects favorable wind patterns, lower industrial density, or effective regional emission controls. Metros with comparable AQI profiles include Athens, TN (77.5% good, AQI 37); Bemidji, MN (88.8% good, AQI 37); Chambersburg-Waynesboro, PA (93.0% good, AQI 37).

Air Quality Summary

Median AQI

37

Good

Good Days

93.9%

216 of 230 days

Max AQI

87

Moderate

Health Grade

Excellent

90th pct: 48

AQI Day Breakdown (2025)

Distribution of 230 monitored days across EPA AQI categories.

Good

216

94%

Moderate

14

6%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Excellent

The Wabash, IN metro area's air quality is rated Excellent based on 93.9% 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 Wabash, IN metro compare?

How Wabash, IN compares

Good-day share better than US avg
Wabash, IN 93.9%
Athens, TN 77.5%
US average 71.3%
Median AQI better than US avg
Wabash, IN 37
Athens, TN 37
US average 41
Unhealthy days / yr better than US avg
Wabash, IN 0
Athens, TN 0
US average 1

5-Year Air Quality Trend

Air quality is stable in the Wabash, IN metro. Best year: 2020 (337 good days).

Year Good Moderate Unhealthy Median AQI
2020 337 26 0 35
2021 327 34 0 35
2022 334 27 0 37
2023 313 48 0 36
2024 324 41 0 36
2025 216 14 0 37

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Wabash, IN.

Athens, TN

AQI 37 · 77.5% good

37

Bemidji, MN

AQI 37 · 88.8% good

37

Chambersburg-Waynesboro, PA

AQI 37 · 93.0% good

37

Crestview-Fort Walton Beach-Destin, FL

AQI 37 · 92.7% good

37

Gainesville, FL

AQI 37 · 90.1% good

37

Grand Island, NE

AQI 37 · 80.2% good

37

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 Wabash, IN metro area? ▼
The Wabash, IN metro area has a median Air Quality Index (AQI) of 37, rated "Good." 93.9% of monitored days (216 out of 230) had good air quality in 2025.
How many unhealthy air days does Wabash, IN have? ▼
In 2025, the Wabash, IN metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 87.
Is air quality in Wabash, IN getting better or worse? ▼
Air quality in the Wabash, IN metro is stable based on 5-year trends (2020-2025). Best year: 2020 with 337 good days. Worst year: 2025 with 216 good days.
What does AQI 37 mean for health? ▼
An AQI of 37 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.
What is the 90th percentile AQI for Wabash, IN? ▼
The 90th percentile AQI for the Wabash, IN metro area is 48, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 87 (Moderate).
How does Wabash, IN compare to other metro areas? ▼
The Wabash, IN metro has 93.9% good air days. Similar metros: Athens, TN (77.5% good), Bemidji, MN (88.8% good), Chambersburg-Waynesboro, PA (93.0% good).

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

Every figure on PlainAir 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.