Metro area air quality · 2025

Muncie, IN

Median AQI 43 (Good). 64.7% of monitored days rated Good across this metro's EPA monitoring network.

43
Median AQI
64.7%
Good-air days
0
Unhealthy days
33%
Cleaner than US metros

Muncie, IN posted a 2025 median AQI of 43 (Good) with 64.7% Good days

According to the U.S. EPA Air Quality System, the Muncie, IN CBSA recorded a median AQI of 43 across 365 monitored days in 2025, with 64.7% 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 Muncie, IN CBSA's 64.7% Good-day share places it cleaner than 33% of US metros in 2025.
Closest median-AQI peer
Ashtabula, OH (81.2% Good, median AQI 43) is the closest nationwide median-AQI peer to Muncie, IN.
2020–2025 Good-day shift
Muncie, IN's Good-day share moved -18.0 points from 2020 to 2025 (median AQI +8).
Median AQI
Median AQI: 43

Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →

The verdict

Muncie, IN lands in the lower Good-day tercile (64.7% 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 43 and 64.7% of 365 monitored days in the Good band.

43
median AQI · Good
64.7%
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

2024 → 2025
  • Muncie, IN metro's peak single-day AQI rose from 97 to 108 between the 2024 and 2025 EPA annual releases, a change of +11 points.

Compared against 366 monitored days in 2024 and 363 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

Muncie, IN lands in the lower Good-day tercile (64.7% Good), a thinner clean-air share than most CBSA peers here. Signature read: 64.7% 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 43 over 365 measured days in 2025 (Good / Moderate). The monitored-day split lands at 236 Good (65%), 127 Moderate (35%), and 2 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 63; the highest single-day reading hit 108 (USG).

Across 2020–2025, Good-day share shifted -18.0 points and median AQI moved +8 (worsening). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Ashtabula, OH (81.2% good, AQI 43); Bloomington, IN (67.7% good, AQI 43); Champaign-Urbana, IL (65.8% good, AQI 43).

Health effects of air pollution →

Air Quality Summary

Median AQI

43

Good

Good Days

64.7%

236 of 365 days

Max AQI

108

USG

Health Grade

Moderate

90th pct: 63

AQI Day Breakdown (2025)

Distribution of 365 monitored days across EPA AQI categories.

Good

236

65%

Moderate

127

35%

USG

2

1%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Moderate

The Muncie, IN metro area's air quality is rated Moderate based on 64.7% 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 Muncie, IN metro compare?

How Muncie, IN compares

Good-day share worse than typical
Muncie, IN 64.7%
Ashtabula, OH 81.2%
Typical US metro 70.6%
Median AQI worse than typical
Muncie, IN 43
Ashtabula, OH 43
Typical US metro 41
Unhealthy days / yr better than typical
Muncie, IN 0
Ashtabula, OH 0
Typical US metro 1

5-Year Air Quality Trend

Air quality is worsening in the Muncie, IN metro. Highest Good-day share: 2022 (84.6%, 303 of 358 monitored days).

Year Good Moderate Unhealthy Median AQI
2020 303 62 0 35
2021 299 63 0 37
2022 303 55 0 38
2023 287 71 0 40
2024 240 126 0 44
2025 236 127 0 43

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Muncie, IN (43).

Ashtabula, OH

Median AQI 43 · 81.2% Good-day share

43

Bloomington, IN

Median AQI 43 · 67.7% Good-day share

43

Champaign-Urbana, IL

Median AQI 43 · 65.8% Good-day share

43

Cleveland, MS

Median AQI 43 · 71.9% Good-day share

43

Columbus, IN

Median AQI 43 · 72.6% Good-day share

43

Durham-Chapel Hill, NC

Median AQI 43 · 71.5% Good-day share

43

Metros with similar unhealthy-day exposure

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

How many unhealthy air days does Muncie, IN have? ▼
In 2025, the Muncie, IN metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 108.
What is the air quality in the Muncie, IN metro area? ▼
The Muncie, IN metro area has a median Air Quality Index (AQI) of 43, rated "Good." 64.7% of monitored days (236 out of 365) had good air quality in 2025.
Is air quality in Muncie, IN getting better or worse? ▼
Air quality in the Muncie, IN 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: 2022 at 84.6% (303 of 358 days). Lowest qualifying Good-day share: 2025 at 65.0% (236 of 363 days).
What does AQI 43 mean for health? ▼
An AQI of 43 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 does Muncie, IN compare to other metro areas? ▼
The Muncie, IN metro has 64.7% good air days. Similar metros: Ashtabula, OH (81.2% good), Bloomington, IN (67.7% good), Champaign-Urbana, IL (65.8% good).
What is the 90th percentile AQI for Muncie, IN? ▼
The 90th percentile AQI for the Muncie, IN metro area is 63, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 108 (USG).

Data Sources

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