Flint Air Quality in October
Across 2019–2025, Flint's October air quality had a median AQI of 31 (Good) over 217 monitored days in the Flint, MI area. 0.0% of October days (0 of 217) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 60.8% of days. The cleanest October on record here was 2023 (median AQI 28, 0 days above 100) and the worst was 2024 (median 47, 0 days above 100, peak AQI 66).
- Good: 82.5%
- Moderate: 17.5%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
Even with good outdoor air in Flint, indoor PM2.5, dust and allergens build up. A True-HEPA purifier keeps a bedroom or office consistently clean.
Recommended: Levoit Core 400S — True HEPA · CADR ~141 CFM · rooms up to 219 sq ft
As an Amazon Associate, we earn from qualifying purchases.
How is the air in Flint in October?
Good on a typical day: median AQI 31 across 2019–2025, with 0.0% of October days above AQI 100. Ground-level ozone is the main driver.
- ✓82.5% of October days were Good (AQI 0–50), 17.5% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the October peak was 79.
- ✓Best October: 2023; worst October: 2024.
Frequently asked questions
What is the air quality like in Flint in October?▾
Across 2019–2025, the median daily AQI in Flint in October was 31 (Good). 82.5% of days were Good, 17.5% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is October a good time for outdoor exercise in Flint?▾
A typical October day in Flint sits in the Good range (median AQI 31), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of October days reached AQI 101+ in 2019–2025.
Which pollutant causes Flint's October air quality problems?▾
Ground-level ozone set the daily AQI on 60.8% of October days in Flint. The highest October AQI recorded in 2019–2025 was 79 (Moderate), in 2024.
Flint October air quality, year by year
Flint October air quality by year (Flint, MI, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 30 | 0 | 53 | O3 |
| 2020 | 31 | 31 | 0 | 57 | O3 |
| 2021 | 31 | 31 | 0 | 58 | PM2.5 |
| 2022 | 31 | 46 | 0 | 79 | PM2.5 |
| 2023cleanest | 31 | 28 | 0 | 58 | O3 |
| 2024worst | 31 | 47 | 0 | 66 | O3 |
| 2025 | 31 | 28 | 0 | 74 | O3 |
What October air means in Flint
A typical October day in Flint sits in the Good range (median AQI 31), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of October days reached AQI 101+ in 2019–2025.
October's median AQI of 31 is below Flint's whole-year median of 42, making it one of the area's cleaner periods. Nationally, the median October AQI across every EPA metro area (102,872 metro-days, 2019–2025) is 38, so Flint runs below the national October norm; 0.0% of its October days topped AQI 100 versus 1.3% nationally (below average).
October is part of Flint's fall season (September, October, November); the fall page pools all three months.
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 month 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.