Flint Air Quality in Fall
Across 2019–2025, Flint's fall (September–November) air quality had a median AQI of 35 (Good) over 597 monitored days in the Flint, MI area. 0.0% of fall days (0 of 597) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 50.9% of days. The cleanest fall on record here was 2019 (median AQI 32, 0 days above 100) and the worst was 2022 (median 45, 0 days above 100, peak AQI 79).
- Good: 81.4%
- Moderate: 18.6%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Flint in fall?
Good on a typical day: median AQI 35 across 2019–2025, with 0.0% of fall days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓81.4% of fall days were Good (AQI 0–50), 18.6% Moderate (51–100).
- ✓0 days of 597 reached AQI 101+; the fall peak was 79.
- ✓Cleanest month: October; worst month: November.
Frequently asked questions
What is the air quality like in Flint in fall?▾
Across 2019–2025, the median daily AQI in Flint in fall was 35 (Good). 81.4% of days were Good, 18.6% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 597 monitored days in EPA's Air Quality System.
Is fall a good time for outdoor exercise in Flint?▾
A typical fall day in Flint sits in the Good range (median AQI 35), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of fall days reached AQI 101+ in 2019–2025.
Which pollutant causes Flint's fall air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 50.9% of fall days in Flint. The highest fall AQI recorded in 2019–2025 was 79 (Moderate), in 2022.
Flint fall air quality, year by year
Flint fall air quality by year (Flint, MI, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 91 | 32 | 0 | 75 | O3 |
| 2020 | 91 | 32 | 0 | 71 | PM2.5 |
| 2021 | 91 | 34 | 0 | 60 | PM2.5 |
| 2022worst | 91 | 45 | 0 | 79 | PM2.5 |
| 2023 | 91 | 33 | 0 | 62 | O3 |
| 2024 | 81 | 43 | 0 | 66 | PM2.5 |
| 2025 | 61 | 34 | 0 | 74 | O3 |
What fall air means in Flint
A typical fall day in Flint sits in the Good range (median AQI 35), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of fall days reached AQI 101+ in 2019–2025.
Fall's median AQI of 35 is below Flint's whole-year median of 42, making it one of the area's cleaner periods. Nationally, the median Fall AQI across every EPA metro area (296,275 metro-days, 2019–2025) is 40, so Flint runs below the national Fall norm; 0.0% of its Fall days topped AQI 100 versus 1.5% nationally (below average).
Within the season, October is the cleanest month (median AQI 31, 0.0% of days above 100) and November the worst (median 37, 0.0% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Flint
The latest EPA AirNow observation puts Flint's AQI at 20 (PM2.5). The figures above are multi-year season statistics, not today's reading.
View current Flint air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Flint, 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.