Rockford Air Quality in 2022
In 2022, Rockford's air quality (Rockford, IL area) had a median daily AQI of 43 (Good) across 363 monitored days. 0 days (0.0%) reached Unhealthy for Sensitive Groups or worse, 237 were Good, and the year's peak AQI was 97 (Moderate). Fine particulate matter (PM2.5) set the daily AQI on 240 of those days. The cleanest month of 2022 was September (median AQI 37, 0 days above 100) and the worst was December (median 51, 0 days above 100, peak 82).
- Good: 65.3%
- Moderate: 34.7%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How was Rockford's air quality in 2022?
Good on a typical day: median AQI 43, with 0 days above AQI 100 out of 363 monitored — the 1st cleanest of 7 years on record for the area.
- ✓Peak AQI in 2022: 97 (Moderate).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 240 days.
- ✓Cleanest month: September; worst: December.
Frequently asked questions
What was the average AQI in Rockford in 2022?▾
EPA's Air Quality System puts Rockford's (Rockford, IL) median daily AQI for 2022 at 43, which is Good. 0 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 97.
Which month had the worst air quality in Rockford in 2022?▾
The cleanest month of 2022 was September (median AQI 37, 0 days above 100) and the worst was December (median 51, 0 days above 100, peak 82).
Was 2022 a good or bad year for Rockford's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2022 ranks 1st cleanest by days above AQI 100 — the best year on record here. 2022's median of 43 is below the area's typical annual median of 47.
Rockford month by month in 2022
Rockford air quality month by month, 2022 (Rockford, IL, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 49 | 0 | 87 | PM2.5 |
| February | 28 | 44 | 0 | 72 | PM2.5 |
| March | 31 | 40 | 0 | 85 | PM2.5 |
| April | 30 | 41 | 0 | 64 | O3 |
| May | 31 | 43 | 0 | 77 | O3 |
| June | 30 | 51 | 0 | 97 | O3 |
| July | 31 | 43 | 0 | 74 | O3 |
| August | 31 | 41 | 0 | 55 | PM2.5 |
| Septembercleanest | 30 | 37 | 0 | 56 | PM2.5 |
| October | 31 | 43 | 0 | 69 | PM2.5 |
| November | 28 | 51 | 0 | 82 | PM2.5 |
| Decemberworst | 31 | 51 | 0 | 82 | PM2.5 |
How 2022 compares
Among the 7 years EPA has published for the area (2019–2025), 2022 ranks 1st cleanest by days above AQI 100 — the best year on record here.
2022's median of 43 is below the area's typical annual median of 47.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Rockford
The latest EPA AirNow observation puts Rockford's AQI at 30 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Rockford air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Rockford, 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.