Peoria Air Quality in 2024
In 2024, Peoria's air quality (Peoria, IL area) had a median daily AQI of 44 (Good) across 344 monitored days. 0 days (0.0%) reached Unhealthy for Sensitive Groups or worse, 236 were Good, and the year's peak AQI was 100 (Moderate). Fine particulate matter (PM2.5) set the daily AQI on 181 of those days. The cleanest month of 2024 was November (median AQI 36, 0 days above 100) and the worst was July (median 50, 0 days above 100, peak 72).
- Good: 68.6%
- Moderate: 31.4%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How was Peoria's air quality in 2024?
Good on a typical day: median AQI 44, with 0 days above AQI 100 out of 344 monitored — the 1st cleanest of 7 years on record for the area.
- ✓Peak AQI in 2024: 100 (Moderate).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 181 days.
- ✓Cleanest month: November; worst: July.
Frequently asked questions
What was the average AQI in Peoria in 2024?▾
EPA's Air Quality System puts Peoria's (Peoria, IL) median daily AQI for 2024 at 44, which is Good. 0 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 100.
Which month had the worst air quality in Peoria in 2024?▾
The cleanest month of 2024 was November (median AQI 36, 0 days above 100) and the worst was July (median 50, 0 days above 100, peak 72).
Was 2024 a good or bad year for Peoria's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 1st cleanest by days above AQI 100 — the best year on record here. 2024's median of 44 is in line with the area's typical annual median of 45.
Peoria month by month in 2024
Peoria air quality month by month, 2024 (Peoria, IL, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 9 | 41 | 0 | 53 | PM2.5 |
| February | 29 | 41 | 0 | 89 | PM2.5 |
| March | 31 | 41 | 0 | 70 | O3 |
| April | 30 | 41 | 0 | 61 | O3 |
| May | 31 | 47 | 0 | 77 | O3 |
| June | 30 | 47 | 0 | 100 | O3 |
| Julyworst | 31 | 50 | 0 | 72 | PM2.5 |
| August | 31 | 47 | 0 | 63 | PM2.5 |
| September | 30 | 39 | 0 | 71 | O3 |
| October | 31 | 44 | 0 | 74 | O3 |
| Novembercleanest | 30 | 36 | 0 | 60 | PM2.5 |
| December | 31 | 44 | 0 | 70 | PM2.5 |
How 2024 compares
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 1st cleanest by days above AQI 100 — the best year on record here.
2024's median of 44 is in line with the area's typical annual median of 45.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Peoria
The latest EPA AirNow observation puts Peoria's AQI at 42 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Peoria air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Peoria, IL), 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.