Lansing Air Quality in 2021
In 2021, Lansing's air quality (Lansing-East Lansing, MI area) had a median daily AQI of 46 (Good) across 365 monitored days. 0 days (0.0%) reached Unhealthy for Sensitive Groups or worse, 205 were Good, and the year's peak AQI was 100 (Moderate). Fine particulate matter (PM2.5) set the daily AQI on 252 of those days. The cleanest month of 2021 was October (median AQI 38, 0 days above 100) and the worst was August (median 55, 0 days above 100, peak 82).
- Good: 56.2%
- Moderate: 43.8%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How was Lansing's air quality in 2021?
Good on a typical day: median AQI 46, with 0 days above AQI 100 out of 365 monitored — the 4th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2021: 100 (Moderate).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 252 days.
- ✓Cleanest month: October; worst: August.
Frequently asked questions
What was the average AQI in Lansing in 2021?▾
EPA's Air Quality System puts Lansing's (Lansing-East Lansing, MI) median daily AQI for 2021 at 46, which is Good. 0 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 100.
Which month had the worst air quality in Lansing in 2021?▾
The cleanest month of 2021 was October (median AQI 38, 0 days above 100) and the worst was August (median 55, 0 days above 100, peak 82).
Was 2021 a good or bad year for Lansing's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2021 ranks 4th cleanest by days above AQI 100. 2021's median of 46 is above the area's typical annual median of 40.
Lansing month by month in 2021
Lansing air quality month by month, 2021 (Lansing-East Lansing, MI, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 53 | 0 | 77 | PM2.5 |
| February | 28 | 51 | 0 | 88 | PM2.5 |
| March | 31 | 42 | 0 | 89 | O3 |
| April | 30 | 43 | 0 | 82 | PM2.5 |
| May | 31 | 45 | 0 | 80 | O3 |
| June | 30 | 44 | 0 | 100 | O3 |
| July | 31 | 55 | 0 | 89 | PM2.5 |
| Augustworst | 31 | 55 | 0 | 82 | PM2.5 |
| September | 30 | 40 | 0 | 57 | PM2.5 |
| Octobercleanest | 31 | 38 | 0 | 62 | PM2.5 |
| November | 30 | 47 | 0 | 77 | PM2.5 |
| December | 31 | 42 | 0 | 74 | PM2.5 |
How 2021 compares
Among the 7 years EPA has published for the area (2019–2025), 2021 ranks 4th cleanest by days above AQI 100.
2021's median of 46 is above the area's typical annual median of 40.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Lansing
The latest EPA AirNow observation puts Lansing's AQI at 25 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Lansing air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Lansing-East Lansing, MI), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.