Detroit Air Quality in 2024
In 2024, Detroit's air quality (Detroit-Warren-Dearborn, MI area) had a median daily AQI of 55 (Moderate) across 366 monitored days. 11 days (3.0%) reached Unhealthy for Sensitive Groups or worse, 118 were Good, and the year's peak AQI was 181 (Unhealthy). Fine particulate matter (PM2.5) set the daily AQI on 270 of those days. The cleanest month of 2024 was April (median AQI 47, 0 days above 100) and the worst was July (median 60, 4 days above 100, peak 181).
- Good: 32.2%
- Moderate: 64.8%
- Unhealthy for Sensitive Groups: 2.7%
- Unhealthy or worse: 0.3%
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How was Detroit's air quality in 2024?
Moderate on a typical day: median AQI 55, with 11 days above AQI 100 out of 366 monitored — the 2nd cleanest of 7 years on record for the area.
- ✓Peak AQI in 2024: 181 (Unhealthy).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 270 days.
- ✓Cleanest month: April; worst: July.
Frequently asked questions
What was the average AQI in Detroit in 2024?▾
EPA's Air Quality System puts Detroit's (Detroit-Warren-Dearborn, MI) median daily AQI for 2024 at 55, which is Moderate. 11 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 181.
Which month had the worst air quality in Detroit in 2024?▾
The cleanest month of 2024 was April (median AQI 47, 0 days above 100) and the worst was July (median 60, 4 days above 100, peak 181).
Was 2024 a good or bad year for Detroit's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 2nd cleanest by days above AQI 100. 2024's median of 55 is below the area's typical annual median of 58.
Detroit month by month in 2024
Detroit air quality month by month, 2024 (Detroit-Warren-Dearborn, MI, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 61 | 0 | 85 | PM2.5 |
| February | 29 | 58 | 1 | 107 | PM2.5 |
| March | 31 | 52 | 0 | 80 | PM2.5 |
| Aprilcleanest | 30 | 47 | 0 | 66 | PM2.5 |
| May | 31 | 51 | 0 | 97 | O3 |
| June | 30 | 57 | 3 | 115 | O3 |
| Julyworst | 31 | 60 | 4 | 181 | O3 |
| August | 31 | 60 | 2 | 112 | PM2.5 |
| September | 30 | 55 | 0 | 84 | PM2.5 |
| October | 31 | 55 | 1 | 134 | PM2.5 |
| November | 30 | 52 | 0 | 69 | PM2.5 |
| December | 31 | 57 | 0 | 72 | PM2.5 |
How 2024 compares
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 2nd cleanest by days above AQI 100.
2024's median of 55 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.