Metro area air quality · 2025

Holland, MI

Median AQI 43 (Good). 71.2% of monitored days rated Good across this metro's EPA monitoring network.

43
Median AQI
71.2%
Good-air days
1
Unhealthy days
46%
Cleaner than US metros

Aggregated from EPA Air Quality System (2025), 302 monitored days. EPA AQS →

The verdict

The Holland, MI metro runs good on the EPA scale, more polluted than the median US metro, a median AQI of 43 with 71.2% of 302 monitored days in the Good band.

43
median AQI · Good
71.2%
days rated Good
46%
cleaner than US metros
151
worst single reading

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

Insights: Holland, MI metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 43 over 302 measured days in 2025, which corresponds to a Good band and a Moderate metro-wide health grade. The monitored-day split lands at 215 Good days (71%), 76 Moderate (25%), and 10 Unhealthy-for-Sensitive-Groups (3%). The 90th-percentile AQI finished at 74 while the highest single-day reading hit 151 (Unhealthy). Metro residents averaged roughly 21.4 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -60 and the median AQI moved +6 points, which classifies the multi-year trajectory as worsening. The metro recorded 1 unhealthy-or-worse days combined, on those days the EPA recommends that sensitive groups limit prolonged outdoor exertion, and many schools and athletic programs adjust outdoor activity accordingly. Metros with comparable AQI profiles include Allentown-Bethlehem-Easton, PA-NJ (65.6% good, AQI 43); Amarillo, TX (75.7% good, AQI 43); Ashtabula, OH (81.2% good, AQI 43).

Air Quality Summary

Median AQI

43

Good

Good Days

71.2%

215 of 302 days

Max AQI

151

Unhealthy

Health Grade

Moderate

90th pct: 74

AQI Day Breakdown (2025)

Distribution of 302 monitored days across EPA AQI categories.

Good

215

71%

Moderate

76

25%

USG

10

3%

Unhealthy

1

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Moderate

The Holland, MI metro area's air quality is rated Moderate based on 71.2% good air days. There were 1 unhealthy days in 2025 when outdoor activity should be limited.

Air quality is acceptable most days, but 10 days reached "Unhealthy for Sensitive Groups" and peak AQI reached 151. Sensitive groups should monitor real-time conditions at AirNow.gov.

How does the Holland, MI metro compare?

How Holland, MI compares

Good-day share about average
Holland, MI 71.2%
Allentown-Bethlehem-Easton, PA-NJ 65.6%
US average 71.3%
Median AQI worse than US avg
Holland, MI 43
Allentown-Bethlehem-Easton, PA-NJ 43
US average 41
Unhealthy days / yr about average
Holland, MI 1
Allentown-Bethlehem-Easton, PA-NJ 0
US average 1

5-Year Air Quality Trend

Air quality is worsening in the Holland, MI metro. Best year: 2020 (275 good days).

Year Good Moderate Unhealthy Median AQI
2020 275 78 0 37
2021 245 107 0 42
2022 256 82 2 40
2023 246 102 1 42
2024 222 125 0 46
2025 215 76 1 43

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Holland, MI.

Allentown-Bethlehem-Easton, PA-NJ

AQI 43 · 65.6% good

43

Amarillo, TX

AQI 43 · 75.7% good

43

Ashtabula, OH

AQI 43 · 81.2% good

43

College Station-Bryan, TX

AQI 43 · 63.4% good

43

Fallon, NV

AQI 43 · 81.0% good

43

Gillette, WY

AQI 43 · 77.3% good

43

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 Holland, MI metro area? ▼
The Holland, MI metro area has a median Air Quality Index (AQI) of 43, rated "Good." 71.2% of monitored days (215 out of 302) had good air quality in 2025.
How many unhealthy air days does Holland, MI have? ▼
In 2025, the Holland, MI metro area recorded 1 unhealthy air days (1 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 151.
Is air quality in Holland, MI getting better or worse? ▼
Air quality in the Holland, MI metro is worsening based on 5-year trends (2020-2025). Best year: 2020 with 275 good days. Worst year: 2025 with 215 good 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.
What is the 90th percentile AQI for Holland, MI? ▼
The 90th percentile AQI for the Holland, MI metro area is 74, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 151 (Unhealthy).
How does Holland, MI compare to other metro areas? ▼
The Holland, MI metro has 71.2% good air days. Similar metros: Allentown-Bethlehem-Easton, PA-NJ (65.6% good), Amarillo, TX (75.7% good), Ashtabula, OH (81.2% 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.