Montgomery Air Quality in 2021
In 2021, Montgomery's air quality (Montgomery, AL area) had a median daily AQI of 44 (Good) across 354 monitored days. 0 days (0.0%) reached Unhealthy for Sensitive Groups or worse, 222 were Good, and the year's peak AQI was 93 (Moderate). Fine particulate matter (PM2.5) set the daily AQI on 264 of those days. The cleanest month of 2021 was December (median AQI 32, 0 days above 100) and the worst was January (median 53, 0 days above 100, peak 61).
- Good: 62.7%
- Moderate: 37.3%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How was Montgomery's air quality in 2021?
Good on a typical day: median AQI 44, with 0 days above AQI 100 out of 354 monitored — the 2nd cleanest of 7 years on record for the area.
- ✓Peak AQI in 2021: 93 (Moderate).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 264 days.
- ✓Cleanest month: December; worst: January.
Frequently asked questions
What was the average AQI in Montgomery in 2021?▾
EPA's Air Quality System puts Montgomery's (Montgomery, AL) median daily AQI for 2021 at 44, which is Good. 0 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 93.
Which month had the worst air quality in Montgomery in 2021?▾
The cleanest month of 2021 was December (median AQI 32, 0 days above 100) and the worst was January (median 53, 0 days above 100, peak 61).
Was 2021 a good or bad year for Montgomery's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2021 ranks 2nd cleanest by days above AQI 100. 2021's median of 44 is in line with the area's typical annual median of 44.
Montgomery month by month in 2021
Montgomery air quality month by month, 2021 (Montgomery, AL, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| Januaryworst | 20 | 53 | 0 | 61 | PM2.5 |
| February | 28 | 40 | 0 | 65 | PM2.5 |
| March | 31 | 49 | 0 | 86 | PM2.5 |
| April | 30 | 52 | 0 | 65 | PM2.5 |
| May | 31 | 45 | 0 | 93 | O3 |
| June | 30 | 36 | 0 | 90 | PM2.5 |
| July | 31 | 35 | 0 | 72 | PM2.5 |
| August | 31 | 42 | 0 | 71 | PM2.5 |
| September | 30 | 40 | 0 | 57 | PM2.5 |
| October | 31 | 36 | 0 | 64 | PM2.5 |
| November | 30 | 50 | 0 | 61 | PM2.5 |
| Decembercleanest | 31 | 32 | 0 | 64 | PM2.5 |
How 2021 compares
Among the 7 years EPA has published for the area (2019–2025), 2021 ranks 2nd cleanest by days above AQI 100.
2021's median of 44 is in line with the area's typical annual median of 44.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Montgomery
The latest EPA AirNow observation puts Montgomery's AQI at 23 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Montgomery air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Montgomery, AL), 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.