Little Rock Air Quality in 2021
In 2021, Little Rock's air quality (Little Rock-North Little Rock-Conway, AR area) had a median daily AQI of 54 (Moderate) across 365 monitored days. 2 days (0.5%) reached Unhealthy for Sensitive Groups or worse, 114 were Good, and the year's peak AQI was 112 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 327 of those days. The cleanest month of 2021 was January (median AQI 45, 0 days above 100) and the worst was September (median 57, 1 day above 100, peak 112).
- Good: 31.2%
- Moderate: 68.2%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
Extra Protection for Little Rock Homes
Air quality in Little Rock is moderate (AQI 53), 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.
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How was Little Rock's air quality in 2021?
Moderate on a typical day: median AQI 54, with 2 days above AQI 100 out of 365 monitored — the 4th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2021: 112 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 327 days.
- ✓Cleanest month: January; worst: September.
Frequently asked questions
What was the average AQI in Little Rock in 2021?▾
EPA's Air Quality System puts Little Rock's (Little Rock-North Little Rock-Conway, AR) median daily AQI for 2021 at 54, which is Moderate. 2 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 112.
Which month had the worst air quality in Little Rock in 2021?▾
The cleanest month of 2021 was January (median AQI 45, 0 days above 100) and the worst was September (median 57, 1 day above 100, peak 112).
Was 2021 a good or bad year for Little Rock's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2021 ranks 4th cleanest by days above AQI 100. 2021's median of 54 is in line with the area's typical annual median of 54.
Little Rock month by month in 2021
Little Rock air quality month by month, 2021 (Little Rock-North Little Rock-Conway, AR, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| Januarycleanest | 31 | 45 | 0 | 73 | PM2.5 |
| February | 28 | 52 | 0 | 59 | PM2.5 |
| March | 31 | 54 | 0 | 100 | PM2.5 |
| April | 30 | 55 | 0 | 67 | PM2.5 |
| May | 31 | 53 | 0 | 64 | PM2.5 |
| June | 30 | 56 | 1 | 101 | PM2.5 |
| July | 31 | 66 | 0 | 91 | PM2.5 |
| August | 31 | 58 | 0 | 92 | PM2.5 |
| Septemberworst | 30 | 57 | 1 | 112 | PM2.5 |
| October | 31 | 51 | 0 | 81 | PM2.5 |
| November | 30 | 57 | 0 | 80 | PM2.5 |
| December | 31 | 59 | 0 | 75 | PM2.5 |
How 2021 compares
Among the 7 years EPA has published for the area (2019–2025), 2021 ranks 4th cleanest by days above AQI 100.
2021's median of 54 is in line with the area's typical annual median of 54.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Little Rock
The latest EPA AirNow observation puts Little Rock's AQI at 53 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Little Rock air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Little Rock-North Little Rock-Conway, AR), 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.