Peoria Air Quality in March
Across 2019–2025, Peoria's March air quality had a median AQI of 42 (Good) over 217 monitored days in the Peoria, IL area. 0.0% of March days (0 of 217) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 55.8% of days. The cleanest March on record here was 2020 (median AQI 39, 0 days above 100) and the worst was 2021 (median 51, 0 days above 100, peak AQI 70).
- Good: 70.0%
- Moderate: 30.0%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
Even with good outdoor air in Peoria, 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 Peoria in March?
Good on a typical day: median AQI 42 across 2019–2025, with 0.0% of March days above AQI 100. Ground-level ozone is the main driver.
- ✓70.0% of March days were Good (AQI 0–50), 30.0% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the March peak was 85.
- ✓Best March: 2020; worst March: 2021.
Frequently asked questions
What is the air quality like in Peoria in March?▾
Across 2019–2025, the median daily AQI in Peoria in March was 42 (Good). 70.0% of days were Good, 30.0% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is March a good time for outdoor exercise in Peoria?▾
A typical March day in Peoria sits in the Good range (median AQI 42), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of March days reached AQI 101+ in 2019–2025.
Which pollutant causes Peoria's March air quality problems?▾
Ground-level ozone set the daily AQI on 55.8% of March days in Peoria. The highest March AQI recorded in 2019–2025 was 85 (Moderate), in 2021.
Peoria March air quality, year by year
Peoria March air quality by year (Peoria, IL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 47 | 0 | 69 | PM2.5 |
| 2020cleanest | 31 | 39 | 0 | 65 | O3 |
| 2021worst | 31 | 51 | 0 | 70 | PM2.5 |
| 2022 | 31 | 45 | 0 | 82 | PM2.5 |
| 2023 | 31 | 39 | 0 | 54 | O3 |
| 2024 | 31 | 41 | 0 | 70 | O3 |
| 2025 | 31 | 41 | 0 | 85 | O3 |
What March air means in Peoria
A typical March day in Peoria sits in the Good range (median AQI 42), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of March days reached AQI 101+ in 2019–2025.
March's median AQI of 42 is in line with Peoria's whole-year median of 45, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median March AQI across every EPA metro area (102,455 metro-days, 2019–2025) is 42, so Peoria runs in line with the national March norm; 0.0% of its March days topped AQI 100 versus 0.4% nationally (about the same).
March is part of Peoria's spring season (March, April, May); the spring page pools all three months.
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 month 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.