Metro area air quality · 2025
Grand Rapids-Wyoming, MI
Median AQI 52 (Moderate). 41.9% of monitored days rated Good across this metro's EPA monitoring network.
- 52
- Median AQI
- 41.9%
- Good-air days
- 2
- Unhealthy days
- 7%
- Cleaner than US metros
Grand Rapids-Wyoming, MI posted a 2025 median AQI of 52 (Moderate) with 41.9% Good days
According to the U.S. EPA Air Quality System, the Grand Rapids-Wyoming, MI CBSA recorded a median AQI of 52 across 365 monitored days in 2025, with 41.9% 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 Grand Rapids-Wyoming, MI CBSA's 41.9% Good-day share places it cleaner than 7% of US metros in 2025.
- Closest median-AQI peer
- Augusta-Richmond County, GA-SC (46.0% Good, median AQI 52) is the closest nationwide median-AQI peer to Grand Rapids-Wyoming, MI.
- 2020–2025 Good-day shift
- Grand Rapids-Wyoming, MI's Good-day share moved -31.1 points from 2020 to 2025 (median AQI +13).
- Median AQI
- Median AQI: 52
Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →
The verdict
The Grand Rapids-Wyoming, MI metro runs moderate on the EPA scale, among the more polluted US metros, a median AQI of 52 with 41.9% of 365 monitored days in the Good band.
- 52
- median AQI · Moderate
- 41.9%
- days rated Good
- 7%
- cleaner than US metros
- 163
- 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
- Grand Rapids-Wyoming, MI metro's Good-day share fell from 48.8% to 42.7% between the 2024 and 2025 EPA annual releases, a change of -6.0 percentage points.
- Grand Rapids-Wyoming, MI metro's peak single-day AQI rose from 112 to 163 between the 2024 and 2025 EPA annual releases, a change of +51 points.
- Grand Rapids-Wyoming, MI metro's Unhealthy-category days rose from 0 to 2 between the 2024 and 2025 EPA annual releases, a change of +2 days.
Insights: Grand Rapids-Wyoming, MI metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 52 over 365 measured days in 2025, which corresponds to a Moderate band and a Poor metro-wide health grade. The monitored-day split lands at 153 Good days (42%), 203 Moderate (56%), and 7 Unhealthy-for-Sensitive-Groups (2%). The 90th-percentile AQI finished at 74 while the highest single-day reading hit 163 (Unhealthy). Metro residents averaged roughly 12.6 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 -31.1 points and the median AQI moved +13 points, which classifies the multi-year trajectory as worsening. The annual record contains 2 days at Unhealthy or worse. On those days, the EPA recommends that sensitive groups limit prolonged outdoor exertion. Metros with comparable AQI profiles include Augusta-Richmond County, GA-SC (46.0% good, AQI 52); Beaumont-Port Arthur, TX (41.4% good, AQI 52); Birmingham-Hoover, AL (43.0% good, AQI 52).
Air Quality Summary
Median AQI
52
Moderate
Good Days
41.9%
153 of 365 days
Max AQI
163
Unhealthy
Health Grade
Poor
90th pct: 74
AQI Day Breakdown (2025)
Distribution of 365 monitored days across EPA AQI categories.
Good
153
42%
Moderate
203
56%
USG
7
2%
Unhealthy
2
1%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Grand Rapids-Wyoming, MI metro area's air quality is rated Poor based on 41.9% good air days. There were 2 unhealthy days in 2025 when outdoor activity should be limited.
Air quality is acceptable most days, but 7 days reached "Unhealthy for Sensitive Groups" and peak AQI reached 163. Sensitive groups should monitor real-time conditions at AirNow.gov.
How does the Grand Rapids-Wyoming, MI metro compare?
How Grand Rapids-Wyoming, MI compares
5-Year Air Quality Trend
Air quality is worsening in the Grand Rapids-Wyoming, MI metro. Highest Good-day share: 2020 (73.8%, 265 of 359 monitored days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 265 | 93 | 1 | 39 | 154 |
| 2021 | 176 | 184 | 0 | 51 | 143 |
| 2022 | 199 | 162 | 2 | 49 | 164 |
| 2023 | 163 | 189 | 2 | 53 | 227 |
| 2024 | 178 | 187 | 0 | 51 | 112 |
| 2025 | 153 | 203 | 2 | 52 | 163 |
Metros with a similar median AQI
CBSA peers nationwide whose annual median AQI sits near Grand Rapids-Wyoming, MI (52).
Augusta-Richmond County, GA-SC
Median AQI 52 · 46.0% Good-day share
Beaumont-Port Arthur, TX
Median AQI 52 · 41.4% Good-day share
Birmingham-Hoover, AL
Median AQI 52 · 43.0% Good-day share
Charlotte-Concord-Gastonia, NC-SC
Median AQI 52 · 46.0% Good-day share
El Dorado, AR
Median AQI 52 · 41.8% Good-day share
Greeley, CO
Median AQI 52 · 44.7% Good-day share
Metros with similar unhealthy-day exposure
A second relationship type: metros whose unhealthy-or-worse day count is closest to Grand Rapids-Wyoming, MI's 2 (independent of median AQI).
Ardmore, OK
2 unhealthy-or-worse days · median AQI 45
Bridgeport-Stamford-Norwalk, CT
2 unhealthy-or-worse days · median AQI 44
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
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 Grand Rapids-Wyoming, MI metro area? ▼
How many unhealthy air days does Grand Rapids-Wyoming, MI have? ▼
Is air quality in Grand Rapids-Wyoming, MI getting better or worse? ▼
What does AQI 52 mean for health? ▼
What is the 90th percentile AQI for Grand Rapids-Wyoming, MI? ▼
How does Grand Rapids-Wyoming, MI compare to other metro areas? ▼
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.