Median AQI
34
Good
Indiana · County air quality · 2025
Wabash County, Indiana
Median AQI 34 (Good). 92.0% of monitored days rated Good, direct from EPA Air Quality System stations.
- 34
- Median AQI
- 92.0%
- Good-air days
- 0
- Unhealthy days
- 85%
- Cleaner than US counties
Wabash County's 2025 annual median AQI is 34 (Good), with 92.0% Good days
According to the U.S. EPA Air Quality System, Wabash County, Indiana posted a 2025 median AQI of 34 (Good) across 351 monitored days, with 92.0% rated Good and 0 unhealthy or worse. This is an annual comparison, not today's advisory.
Data source EPA Air Quality System (AQS)
- Cleaner than US
- Wabash County's 92.0% Good-day share places it cleaner than 85% of US counties in 2025.
- Closest median-AQI peer
- Androscoggin County (85.2% Good, median AQI 34) is the closest nationwide median-AQI peer to Wabash County.
- 2020–2025 trend
- Wabash County's floor-qualifying Good-day share is stable from 2020 to 2025 (92.8% → 92.0%).
- Median AQI
- Median AQI: 34
The verdict
According to EPA Air Quality System monitoring data, Wabash County's air is good on balance, cleaner than most US counties, a median AQI of 34 with 92.0% of 351 monitored days in the Good band, driven mainly by Ozone.
- 34
- median AQI · Good
- 92.0%
- days rated Good
- Ozone
- main pollutant
- 85%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 112.
Annual release change
What changed in the 2025 EPA annual release
- Wabash County's Good-day share rose from 88.8% to 92.0% between the 2024 and 2025 EPA annual releases, a change of +3.3 percentage points.
- Wabash County's peak single-day AQI rose from 84 to 112 between the 2024 and 2025 EPA annual releases, a change of +28 points.
Data updated August 2026
- Good · 323 d · 92.0%
- Moderate · 27 d · 7.7%
- USG · 1 d · 0.3%
How did Wabash County's air break down in 2025?
Across 351 monitored days, 323 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 112 (USG).
EPA AQS →Air quality data from EPA Air Quality System (2025). 351 days monitored. Median AQI: 34 (Good).
Insights: Wabash County, Indiana. EPA monitors recorded a median Air Quality Index of 34 across 351 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 323 (92%) fell in the Good band (AQI 0–50), 27 (8%) registered Moderate readings, and 1 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 49, while the worst single-day peak hit 112 (USG). Residents averaged about 27.6 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (351 days). Across the 2020–2025 trend window, the share of monitored days rated Good shifted by -0.8 points and the median AQI moved -1 points, placing the multi-year trajectory at stable. The worst single reading over the 2020–2025 window was AQI 112, usg but never Unhealthy. Nearby counties show comparable readings: Allen (60.0% good, AQI 44); Bartholomew (72.6% good, AQI 43); Boone (89.7% good, AQI 35); Brown (95.9% good, AQI 34); Carroll (90.8% good, AQI 35); Clark (58.1% good, AQI 46).
Air Quality Summary
Good Days
92.0%
323 of 351 monitored days
17.0pp vs 75% target
Max AQI Recorded
112
USG
Health Grade
Excellent
90th-pct AQI 49
Wabash County, Good days share 92.0%
National avg
Share of monitored days at AQI 0-50 (Good band).
Wabash County, Unhealthy-or-worse share 0.0%
National avg
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
AQI Day Breakdown (2025)
Distribution of 351 monitored days across EPA AQI categories.
Good
323
92%
Moderate
27
8%
USG
1
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Wabash County.
- Ozone · 351 days · 100.0%
Health Impact Assessment
Excellent
Wabash County's air quality is rated Excellent based on 92.0% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 92.0% of monitored days in 2025, with a median AQI of 34. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 351 of 351 monitored days.
5-Year Air Quality Trend
Air quality is stable in Wabash County. Highest Good-day share: 2020 (92.8%, 337 of 363 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 337 | 26 | 0 | 0 | 35 | 97 |
| 2021 | 327 | 34 | 1 | 0 | 35 | 101 |
| 2022 | 334 | 27 | 1 | 0 | 37 | 112 |
| 2023 | 313 | 48 | 3 | 0 | 36 | 126 |
| 2024 | 324 | 41 | 0 | 0 | 36 | 84 |
| 2025 | 323 | 27 | 1 | 0 | 34 | 112 |
How does Wabash County compare?
How Wabash County compares
Good-day share better than typical
Wabash County 92.0%
Androscoggin County, Maine 85.2%
Typical US county 76.0%
Median AQI better than typical
Wabash County 34
Androscoggin County, Maine 34
Typical US county 39
Unhealthy days / yr better than typical
Wabash County 0
Androscoggin County, Maine 0
Typical US county 1
Counties with a similar median AQI
Nationwide peers within about the same annual median AQI as Wabash County (34), not geographic neighbors.
Androscoggin County, Maine
Median AQI 34 · 85.2% Good-day share
Archuleta County, Colorado
Median AQI 34 · 83.0% Good-day share
Bristol City County, Virginia
Median AQI 34 · 78.0% Good-day share
Brown County, Indiana
Median AQI 34 · 95.9% Good-day share
Clark County, Arkansas
Median AQI 34 · 96.7% Good-day share
Clay County, South Dakota
Median AQI 34 · 87.8% Good-day share
Same primary pollutant: Ozone
Ozone led the AQI on the most monitored days here. These peers share that driver and the closest Good-day share (a second relationship type beyond median-AQI neighbors).
Hendricks County, Indiana
92.0% Good-day share · median AQI 35
Vilas County, Wisconsin
92.0% Good-day share · median AQI 36
Knox County, Nebraska
92.0% Good-day share · median AQI 36
Edmonson County, Kentucky
92.1% Good-day share · median AQI 36
Tuscola County, Michigan
91.9% Good-day share · median AQI 35
St. Martin County, Louisiana
92.2% Good-day share · median AQI 36
Indiana counties on the map
Geographic containment only, other monitored counties in Indiana, independent of AQI or pollutant match.
What Wabash County's air means for you
The air here stays in the breathable range year-round, with Ozone the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-Ozone days, the guide explains what a median of 34 means for exposure. Health guidance
- See how Wabash County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Wabash County with its Indiana neighbours before drawing a conclusion about the region. All of Indiana
Based on 351 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
Keep exploring the annual AQI record
Air-quality reading list
Frequently Asked Questions
What is the air quality in Wabash County, Indiana? ▼
Wabash County has a median Air Quality Index (AQI) of 34, rated "Good." 92.0% of monitored days (323 out of 351) had good air quality in 2025.
What is the main pollutant in Wabash County? ▼
The primary pollutant in Wabash County is Ozone (O3), which was the main AQI driver on 351 days (100% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Wabash County have? ▼
In 2025, Wabash County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 112.
Is the air quality in Wabash County getting better or worse? ▼
Air quality in Wabash County is stable 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 92.8% (337 of 363 days). Lowest qualifying Good-day share: 2023 at 86.0% (313 of 364 days).
What does AQI 34 mean for health? ▼
Wabash County's median AQI of 34 falls in the "Good" category. See the AQI category guide for what each range means for health.
How does Wabash County compare to other counties in Indiana? ▼
Wabash County has 92.0% good air days. Nearby counties in Indiana: Allen (60.0% good), Bartholomew (72.6% good), Boone (89.7% good), Brown (95.9% good), Carroll (90.8% good), Clark (58.1% good).
What is the 90th percentile AQI in Wabash County? ▼
The 90th percentile AQI for Wabash County is 49, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 112 (USG).
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer. Spotted a figure that looks wrong? Report a correction.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by county summary files for Wabash County, Indiana · 2020–2025
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Every figure on PlainAirData 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.