Cincinnati Air Quality in 2024
In 2024, Cincinnati's air quality (Cincinnati, OH-KY-IN area) had a median daily AQI of 54 (Moderate) across 366 monitored days. 14 days (3.8%) reached Unhealthy for Sensitive Groups or worse, 131 were Good, and the year's peak AQI was 147 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 243 of those days. The cleanest month of 2024 was March (median AQI 45, 0 days above 100) and the worst was June (median 56, 7 days above 100, peak 129).
- Good: 35.8%
- Moderate: 60.4%
- Unhealthy for Sensitive Groups: 3.8%
- Unhealthy or worse: 0.0%
Extra Protection for Cincinnati Homes
Air quality in Cincinnati is moderate (AQI 65), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
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How was Cincinnati's air quality in 2024?
Moderate on a typical day: median AQI 54, with 14 days above AQI 100 out of 366 monitored — the 5th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2024: 147 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 243 days.
- ✓Cleanest month: March; worst: June.
Frequently asked questions
What was the average AQI in Cincinnati in 2024?▾
EPA's Air Quality System puts Cincinnati's (Cincinnati, OH-KY-IN) median daily AQI for 2024 at 54, which is Moderate. 14 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 147.
Which month had the worst air quality in Cincinnati in 2024?▾
The cleanest month of 2024 was March (median AQI 45, 0 days above 100) and the worst was June (median 56, 7 days above 100, peak 129).
Was 2024 a good or bad year for Cincinnati's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 5th cleanest by days above AQI 100. 2024's median of 54 is in line with the area's typical annual median of 56.
Cincinnati month by month in 2024
Cincinnati air quality month by month, 2024 (Cincinnati, OH-KY-IN, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 54 | 0 | 82 | PM2.5 |
| February | 29 | 57 | 1 | 103 | PM2.5 |
| Marchcleanest | 31 | 45 | 0 | 67 | PM2.5 |
| April | 30 | 51 | 0 | 74 | O3 |
| May | 31 | 54 | 0 | 93 | PM2.5 |
| Juneworst | 30 | 56 | 7 | 129 | O3 |
| July | 31 | 62 | 1 | 108 | O3 |
| August | 31 | 57 | 4 | 147 | O3 |
| September | 30 | 52 | 1 | 105 | PM2.5 |
| October | 31 | 60 | 0 | 87 | PM2.5 |
| November | 30 | 48 | 0 | 65 | PM2.5 |
| December | 31 | 49 | 0 | 65 | PM2.5 |
How 2024 compares
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 5th cleanest by days above AQI 100.
2024's median of 54 is in line with the area's typical annual median of 56.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Cincinnati
The latest EPA AirNow observation puts Cincinnati's AQI at 65 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Cincinnati air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Cincinnati, OH-KY-IN), 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.