Metro area air quality · 2025
Lansing-East Lansing, MI
Median AQI 39 (Good). 72.3% of monitored days rated Good across this metro's EPA monitoring network.
- 39
- Median AQI
- 72.3%
- Good-air days
- 1
- Unhealthy days
- 50%
- Cleaner than US metros
Lansing-East Lansing, MI posted a 2025 median AQI of 39 (Good) with 72.3% Good days
According to the U.S. EPA Air Quality System, the Lansing-East Lansing, MI CBSA recorded a median AQI of 39 across 365 monitored days in 2025, with 72.3% 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 Lansing-East Lansing, MI CBSA's 72.3% Good-day share places it cleaner than 50% of US metros in 2025.
- Closest median-AQI peer
- Bay City, MI (70.4% Good, median AQI 39) is the closest nationwide median-AQI peer to Lansing-East Lansing, MI.
- 2020–2025 Good-day shift
- Lansing-East Lansing, MI's Good-day share moved -7.1 points from 2020 to 2025 (median AQI +2).
- Median AQI
- Median AQI: 39
Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →
The verdict
Lansing-East Lansing, MI's peak reading 153 is in the upper max-AQI tercile among CBSA metros here. On the EPA scale the metro runs good, cleaner than the median US metro, with a median AQI of 39 and 72.3% of 365 monitored days in the Good band.
- 39
- median AQI · Good
- 72.3%
- days rated Good
- 50%
- cleaner than US metros
- 153
- 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
- Lansing-East Lansing, MI metro's peak single-day AQI rose from 85 to 153 between the 2024 and 2025 EPA annual releases, a change of +68 points.
- Lansing-East Lansing, MI metro's Good-day share fell from 75.7% to 73.7% between the 2024 and 2025 EPA annual releases, a change of -1.9 percentage points.
- Lansing-East Lansing, MI metro's Unhealthy-category days rose from 0 to 1 between the 2024 and 2025 EPA annual releases, a change of +1 days.
Lansing-East Lansing, MI's peak reading 153 is in the upper max-AQI tercile among CBSA metros here. Signature read: peak AQI 153 (high tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 39 over 365 measured days in 2025 (Good / Moderate). The monitored-day split lands at 264 Good (72%), 93 Moderate (25%), and 7 Unhealthy-for-Sensitive-Groups (2%). The 90th-percentile AQI finished at 64; the highest single-day reading hit 153 (Unhealthy).
Across 2020–2025, Good-day share shifted -7.1 points and median AQI moved +2 (worsening). The annual record contains 1 day at Unhealthy or worse. Metros with comparable AQI profiles include Bay City, MI (70.4% good, AQI 39); Brainerd, MN (74.3% good, AQI 39); Cambridge, MD (86.0% good, AQI 39).
Air Quality Summary
Median AQI
39
Good
Good Days
72.3%
264 of 365 days
Max AQI
153
Unhealthy
Health Grade
Moderate
90th pct: 64
AQI Day Breakdown (2025)
Distribution of 365 monitored days across EPA AQI categories.
Good
264
72%
Moderate
93
25%
USG
7
2%
Unhealthy
1
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Lansing-East Lansing, MI metro area's air quality is rated Moderate based on 72.3% good air days. There were 1 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 153. Sensitive groups should monitor real-time conditions at AirNow.gov.
How does the Lansing-East Lansing, MI metro compare?
How Lansing-East Lansing, MI compares
5-Year Air Quality Trend
Air quality is worsening in the Lansing-East Lansing, MI metro. Highest Good-day share: 2020 (80.9%, 296 of 366 monitored days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 296 | 69 | 1 | 37 | 151 |
| 2021 | 205 | 160 | 0 | 46 | 100 |
| 2022 | 236 | 129 | 0 | 44 | 93 |
| 2023 | 230 | 124 | 4 | 43 | 194 |
| 2024 | 277 | 89 | 0 | 40 | 85 |
| 2025 | 264 | 93 | 1 | 39 | 153 |
Metros with a similar median AQI
CBSA peers nationwide whose annual median AQI sits near Lansing-East Lansing, MI (39).
Bay City, MI
Median AQI 39 · 70.4% Good-day share
Brainerd, MN
Median AQI 39 · 74.3% Good-day share
Cambridge, MD
Median AQI 39 · 86.0% Good-day share
Charleston, WV
Median AQI 39 · 77.0% Good-day share
Dalton, GA
Median AQI 39 · 90.3% Good-day share
Harrisonburg, VA
Median AQI 39 · 80.0% Good-day share
Metros with similar unhealthy-day exposure
A second relationship type: metros whose unhealthy-or-worse day count is closest to Lansing-East Lansing, MI's 1 (independent of median AQI).
Ann Arbor, MI
1 unhealthy-or-worse days · median AQI 41
Bangor, ME
1 unhealthy-or-worse days · median AQI 33
Baraboo, WI
1 unhealthy-or-worse days · median AQI 35
Bartlesville, OK
1 unhealthy-or-worse days · median AQI 44
Beaumont-Port Arthur, TX
1 unhealthy-or-worse days · median AQI 52
Beaver Dam, WI
1 unhealthy-or-worse days · median AQI 40
Frequently Asked Questions
What is the 90th percentile AQI for Lansing-East Lansing, MI? ▼
How many unhealthy air days does Lansing-East Lansing, MI have? ▼
What is the air quality in the Lansing-East Lansing, MI metro area? ▼
Is air quality in Lansing-East Lansing, MI getting better or worse? ▼
What does AQI 39 mean for health? ▼
How does Lansing-East Lansing, 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 for Lansing-East Lansing, 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, Lansing-East Lansing, MI · 2020–2025