Metro area air quality · 2025

Springfield, MO

Median AQI 45 (Good). 62.6% of monitored days rated Good across this metro's EPA monitoring network.

45
Median AQI
62.6%
Good-air days
1
Unhealthy days
30%
Cleaner than US metros

Springfield, MO posted a 2025 median AQI of 45 (Good) with 62.6% Good days

According to the U.S. EPA Air Quality System, the Springfield, MO CBSA recorded a median AQI of 45 across 364 monitored days in 2025, with 62.6% rated Good and 1 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 Springfield, MO CBSA's 62.6% Good-day share places it cleaner than 30% of US metros in 2025.
Closest median-AQI peer
Akron, OH (61.6% Good, median AQI 45) is the closest nationwide median-AQI peer to Springfield, MO.
2020–2025 Good-day shift
Springfield, MO's Good-day share moved -10.7 points from 2020 to 2025 (median AQI +5).
Median AQI
Median AQI: 45

Aggregated from EPA Air Quality System (2025), 364 monitored days. EPA AQS →

The verdict

The Springfield, MO metro runs good on the EPA scale, more polluted than the median US metro, a median AQI of 45 with 62.6% of 364 monitored days in the Good band.

45
median AQI · Good
62.6%
days rated Good
30%
cleaner than US metros
160
worst single reading

1 day reached Unhealthy or worse across the metro's monitors in 2025.

Annual release change

What changed in the 2025 EPA annual release

2024 → 2025
  • Springfield, MO metro's peak single-day AQI rose from 90 to 160 between the 2024 and 2025 EPA annual releases, a change of +70 points.
  • Springfield, MO metro's Unhealthy-category days rose from 0 to 1 between the 2024 and 2025 EPA annual releases, a change of +1 days.

Compared against 360 monitored days in 2024 and 361 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

Insights: Springfield, MO metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 45 over 364 measured days in 2025, which corresponds to a Good band and a Moderate metro-wide health grade. The monitored-day split lands at 228 Good days (63%), 132 Moderate (36%), and 3 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 62 while the highest single-day reading hit 160 (Unhealthy). Metro residents averaged roughly 18.8 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, the share of monitored days rated Good shifted by -10.7 points and the median AQI moved +5 points, which classifies the multi-year trajectory as worsening. The annual record contains 1 day at Unhealthy or worse. On that day, the EPA recommends that sensitive groups limit prolonged outdoor exertion. Metros with comparable AQI profiles include Akron, OH (61.6% good, AQI 45); Ardmore, OK (67.9% good, AQI 45); Asheville, NC (69.9% good, AQI 45).

Air Quality Summary

Median AQI

45

Good

Good Days

62.6%

228 of 364 days

Max AQI

160

Unhealthy

Health Grade

Moderate

90th pct: 62

AQI Day Breakdown (2025)

Distribution of 364 monitored days across EPA AQI categories.

Good

228

63%

Moderate

132

36%

USG

3

1%

Unhealthy

1

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Moderate

The Springfield, MO metro area's air quality is rated Moderate based on 62.6% good air days. There were 1 unhealthy days in 2025 when outdoor activity should be limited.

Air quality is acceptable most days, but 3 days reached "Unhealthy for Sensitive Groups" and peak AQI reached 160. Sensitive groups should monitor real-time conditions at AirNow.gov.

How does the Springfield, MO metro compare?

How Springfield, MO compares

Good-day share worse than typical
Springfield, MO 62.6%
Akron, OH 61.6%
Typical US metro 70.6%
Median AQI worse than typical
Springfield, MO 45
Akron, OH 45
Typical US metro 41
Unhealthy days / yr about typical
Springfield, MO 1
Akron, OH 0
Typical US metro 1

5-Year Air Quality Trend

Air quality is worsening in the Springfield, MO metro. Highest Good-day share: 2021 (82.2%, 300 of 365 monitored days).

Year Good Moderate Unhealthy Median AQI
2020 268 95 0 40
2021 300 65 0 38
2022 202 163 0 49
2023 188 171 0 49
2024 227 133 0 45
2025 228 132 1 45

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Springfield, MO (45).

Akron, OH

Median AQI 45 · 61.6% Good-day share

45

Ardmore, OK

Median AQI 45 · 67.9% Good-day share

45

Asheville, NC

Median AQI 45 · 69.9% Good-day share

45

Cheyenne, WY

Median AQI 45 · 75.1% Good-day share

45

Clinton, IA

Median AQI 45 · 59.5% Good-day share

45

Fort Dodge, IA

Median AQI 45 · 59.2% Good-day share

45

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Springfield, MO's 1 (independent of median AQI).

Ann Arbor, MI

1 unhealthy-or-worse days · median AQI 41

41

Bangor, ME

1 unhealthy-or-worse days · median AQI 33

33

Baraboo, WI

1 unhealthy-or-worse days · median AQI 35

35

Bartlesville, OK

1 unhealthy-or-worse days · median AQI 44

44

Beaumont-Port Arthur, TX

1 unhealthy-or-worse days · median AQI 52

52

Beaver Dam, WI

1 unhealthy-or-worse days · median AQI 40

40

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 Springfield, MO metro area? ▼
The Springfield, MO metro area has a median Air Quality Index (AQI) of 45, rated "Good." 62.6% of monitored days (228 out of 364) had good air quality in 2025.
How many unhealthy air days does Springfield, MO have? ▼
In 2025, the Springfield, MO metro area recorded 1 unhealthy air days (1 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 160.
Is air quality in Springfield, MO getting better or worse? ▼
Air quality in the Springfield, MO 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: 2021 at 82.2% (300 of 365 days). Lowest qualifying Good-day share: 2023 at 52.4% (188 of 359 days).
What does AQI 45 mean for health? ▼
An AQI of 45 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 Springfield, MO? ▼
The 90th percentile AQI for the Springfield, MO metro area is 62, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 160 (Unhealthy).
How does Springfield, MO compare to other metro areas? ▼
The Springfield, MO metro has 62.6% good air days. Similar metros: Akron, OH (61.6% good), Ardmore, OK (67.9% good), Asheville, NC (69.9% 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

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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.