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
Grand Rapids-Wyoming, MI lands in the lower Good-day tercile (41.9% Good), a thinner clean-air share than most CBSA peers here. On the EPA scale the metro runs moderate, among the more polluted US metros, with a median AQI of 52 and 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.
Grand Rapids-Wyoming, MI lands in the lower Good-day tercile (41.9% Good), a thinner clean-air share than most CBSA peers here. Signature read: 41.9% 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 52 over 365 measured days in 2025 (Moderate / Poor). The monitored-day split lands at 153 Good (42%), 203 Moderate (56%), and 7 Unhealthy-for-Sensitive-Groups (2%). The 90th-percentile AQI finished at 74; the highest single-day reading hit 163 (Unhealthy).
Across 2020–2025, Good-day share shifted -31.1 points and median AQI moved +13 (worsening). The annual record contains 2 days at Unhealthy or worse. 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
Frequently Asked Questions
How many unhealthy air days does Grand Rapids-Wyoming, MI have? ▼
What is the air quality in the Grand Rapids-Wyoming, MI metro area? ▼
Is air quality in Grand Rapids-Wyoming, MI getting better or worse? ▼
What does AQI 52 mean for health? ▼
How does Grand Rapids-Wyoming, MI compare to other metro areas? ▼
What is the 90th percentile AQI for Grand Rapids-Wyoming, MI? ▼
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Grand Rapids-Wyoming, 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, Grand Rapids-Wyoming, MI · 2020–2025