Detroit Air Quality in 2025
In 2025, Detroit's air quality (Detroit-Warren-Dearborn, MI area) had a median daily AQI of 54 (Moderate) across 365 monitored days. 16 days (4.4%) reached Unhealthy for Sensitive Groups or worse, 132 were Good, and the year's peak AQI was 166 (Unhealthy). Fine particulate matter (PM2.5) set the daily AQI on 281 of those days. The cleanest month of 2025 was May (median AQI 47, 0 days above 100) and the worst was July (median 65, 6 days above 100, peak 166).
- Good: 36.2%
- Moderate: 59.5%
- Unhealthy for Sensitive Groups: 3.6%
- Unhealthy or worse: 0.8%
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How was Detroit's air quality in 2025?
Moderate on a typical day: median AQI 54, with 16 days above AQI 100 out of 365 monitored — the 4th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2025: 166 (Unhealthy).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 281 days.
- ✓Cleanest month: May; worst: July.
Frequently asked questions
What was the average AQI in Detroit in 2025?▾
EPA's Air Quality System puts Detroit's (Detroit-Warren-Dearborn, MI) median daily AQI for 2025 at 54, which is Moderate. 16 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 166.
Which month had the worst air quality in Detroit in 2025?▾
The cleanest month of 2025 was May (median AQI 47, 0 days above 100) and the worst was July (median 65, 6 days above 100, peak 166).
Was 2025 a good or bad year for Detroit's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2025 ranks 4th cleanest by days above AQI 100. 2025's median of 54 is below the area's typical annual median of 58.
Detroit month by month in 2025
Detroit air quality month by month, 2025 (Detroit-Warren-Dearborn, MI, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 56 | 0 | 88 | PM2.5 |
| February | 28 | 55 | 0 | 75 | PM2.5 |
| March | 31 | 52 | 0 | 69 | PM2.5 |
| April | 30 | 52 | 1 | 121 | PM2.5 |
| Maycleanest | 31 | 47 | 0 | 87 | PM2.5 |
| June | 30 | 64 | 5 | 152 | PM2.5 |
| Julyworst | 31 | 65 | 6 | 166 | PM2.5 |
| August | 31 | 58 | 3 | 152 | PM2.5 |
| September | 30 | 54 | 1 | 108 | PM2.5 |
| October | 31 | 48 | 0 | 90 | PM2.5 |
| November | 30 | 54 | 0 | 77 | PM2.5 |
| December | 31 | 59 | 0 | 82 | PM2.5 |
How 2025 compares
Among the 7 years EPA has published for the area (2019–2025), 2025 ranks 4th cleanest by days above AQI 100.
2025's median of 54 is below the area's typical annual median of 58.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Detroit
The latest EPA AirNow observation puts Detroit's AQI at 29 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Detroit air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Detroit-Warren-Dearborn, 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.