Metro area air quality · 2025
Holland, MI
Median AQI 44 (Good). 63.9% of monitored days rated Good across this metro's EPA monitoring network.
- 44
- Median AQI
- 63.9%
- Good-air days
- 2
- Unhealthy days
- 32%
- Cleaner than US metros
Holland, MI posted a 2025 median AQI of 44 (Good) with 63.9% Good days
According to the U.S. EPA Air Quality System, the Holland, MI CBSA recorded a median AQI of 44 across 363 monitored days in 2025, with 63.9% rated Good and 2 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 Holland, MI CBSA's 63.9% Good-day share places it cleaner than 32% of US metros in 2025.
- Closest median-AQI peer
- Bartlesville, OK (68.0% Good, median AQI 44) is the closest nationwide median-AQI peer to Holland, MI.
- 2020–2025 Good-day shift
- Holland, MI's Good-day share moved -11.8 points from 2020 to 2025 (median AQI +7).
- Median AQI
- Median AQI: 44
Aggregated from EPA Air Quality System (2025), 363 monitored days. EPA AQS →
The verdict
Holland, MI lands in the lower Good-day tercile (63.9% 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 44 and 63.9% of 363 monitored days in the Good band.
- 44
- median AQI · Good
- 63.9%
- days rated Good
- 32%
- cleaner than US metros
- 151
- worst single reading
2 days reached Unhealthy or worse across the metro's monitors in 2025.
Annual release change
What changed in the 2025 EPA annual release
- Holland, MI metro's peak single-day AQI rose from 115 to 151 between the 2024 and 2025 EPA annual releases, a change of +36 points.
- Holland, MI metro's Good-day share rose from 64.0% to 66.1% between the 2024 and 2025 EPA annual releases, a change of +2.1 percentage points.
- Holland, MI metro's Unhealthy-category days rose from 0 to 2 between the 2024 and 2025 EPA annual releases, a change of +2 days.
Holland, MI lands in the lower Good-day tercile (63.9% Good), a thinner clean-air share than most CBSA peers here. Signature read: 63.9% 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 44 over 363 measured days in 2025 (Good / Moderate). The monitored-day split lands at 232 Good (64%), 117 Moderate (32%), and 12 Unhealthy-for-Sensitive-Groups (3%). The 90th-percentile AQI finished at 75; the highest single-day reading hit 151 (Unhealthy).
Across 2020–2025, Good-day share shifted -11.8 points and median AQI moved +7 (worsening). The annual record contains 2 days at Unhealthy or worse. Metros with comparable AQI profiles include Bartlesville, OK (68.0% good, AQI 44); Berlin, NH-VT (81.5% good, AQI 44); Bloomington, IL (66.0% good, AQI 44).
Air Quality Summary
Median AQI
44
Good
Good Days
63.9%
232 of 363 days
Max AQI
151
Unhealthy
Health Grade
Moderate
90th pct: 75
AQI Day Breakdown (2025)
Distribution of 363 monitored days across EPA AQI categories.
Good
232
64%
Moderate
117
32%
USG
12
3%
Unhealthy
2
1%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Holland, MI metro area's air quality is rated Moderate based on 63.9% good air days. There were 2 unhealthy days in 2025 when outdoor activity should be limited.
Air quality is acceptable most days, but 12 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
5-Year Air Quality Trend
Air quality is worsening in the Holland, MI metro. Highest Good-day share: 2020 (77.9%, 275 of 353 monitored days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 275 | 78 | 0 | 37 | 136 |
| 2021 | 245 | 107 | 0 | 42 | 136 |
| 2022 | 256 | 82 | 2 | 40 | 195 |
| 2023 | 246 | 102 | 1 | 42 | 161 |
| 2024 | 222 | 125 | 0 | 46 | 115 |
| 2025 | 232 | 117 | 2 | 44 | 151 |
Metros with a similar median AQI
CBSA peers nationwide whose annual median AQI sits near Holland, MI (44).
Bartlesville, OK
Median AQI 44 · 68.0% Good-day share
Berlin, NH-VT
Median AQI 44 · 81.5% Good-day share
Bloomington, IL
Median AQI 44 · 66.0% Good-day share
Boston-Cambridge-Newton, MA-NH
Median AQI 44 · 71.0% Good-day share
Bridgeport-Stamford-Norwalk, CT
Median AQI 44 · 64.7% Good-day share
Buffalo-Cheektowaga-Niagara Falls, NY
Median AQI 44 · 63.8% Good-day share
Metros with similar unhealthy-day exposure
A second relationship type: metros whose unhealthy-or-worse day count is closest to Holland, MI's 2 (independent of median AQI).
Ardmore, OK
2 unhealthy-or-worse days · median AQI 45
Chattanooga, TN-GA
2 unhealthy-or-worse days · median AQI 49
Cincinnati, OH-KY-IN
2 unhealthy-or-worse days · median AQI 56
Columbus, GA-AL
2 unhealthy-or-worse days · median AQI 48
Davenport-Moline-Rock Island, IA-IL
2 unhealthy-or-worse days · median AQI 46
Fort Dodge, IA
2 unhealthy-or-worse days · median AQI 45
Frequently Asked Questions
How many unhealthy air days does Holland, MI have? ▼
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Is air quality in Holland, MI getting better or worse? ▼
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What is the 90th percentile AQI for Holland, MI? ▼
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Holland, MI, 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, Holland, MI · 2020–2025