Baton Rouge Air Quality in 2021
In 2021, Baton Rouge's air quality (Baton Rouge, LA area) had a median daily AQI of 53 (Moderate) across 365 monitored days. 5 days (1.4%) reached Unhealthy for Sensitive Groups or worse, 139 were Good, and the year's peak AQI was 159 (Unhealthy). Fine particulate matter (PM2.5) set the daily AQI on 284 of those days. The cleanest month of 2021 was March (median AQI 48, 0 days above 100) and the worst was August (median 56, 2 days above 100, peak 159).
- Good: 38.1%
- Moderate: 60.5%
- Unhealthy for Sensitive Groups: 1.1%
- Unhealthy or worse: 0.3%
Extra Protection for Baton Rouge Homes
Air quality in Baton Rouge is moderate (AQI 57), 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 Baton Rouge's air quality in 2021?
Moderate on a typical day: median AQI 53, with 5 days above AQI 100 out of 365 monitored — the 2nd cleanest of 7 years on record for the area.
- ✓Peak AQI in 2021: 159 (Unhealthy).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 284 days.
- ✓Cleanest month: March; worst: August.
Frequently asked questions
What was the average AQI in Baton Rouge in 2021?▾
EPA's Air Quality System puts Baton Rouge's (Baton Rouge, LA) median daily AQI for 2021 at 53, which is Moderate. 5 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 159.
Which month had the worst air quality in Baton Rouge in 2021?▾
The cleanest month of 2021 was March (median AQI 48, 0 days above 100) and the worst was August (median 56, 2 days above 100, peak 159).
Was 2021 a good or bad year for Baton Rouge'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 53 is in line with the area's typical annual median of 53.
Baton Rouge month by month in 2021
Baton Rouge air quality month by month, 2021 (Baton Rouge, LA, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 51 | 0 | 68 | PM2.5 |
| February | 28 | 53 | 0 | 63 | PM2.5 |
| Marchcleanest | 31 | 48 | 0 | 66 | PM2.5 |
| April | 30 | 52 | 0 | 100 | O3 |
| May | 31 | 51 | 0 | 87 | PM2.5 |
| June | 30 | 49 | 1 | 129 | PM2.5 |
| July | 31 | 55 | 1 | 119 | PM2.5 |
| Augustworst | 31 | 56 | 2 | 159 | PM2.5 |
| September | 30 | 56 | 0 | 90 | PM2.5 |
| October | 31 | 56 | 1 | 150 | PM2.5 |
| November | 30 | 58 | 0 | 85 | PM2.5 |
| December | 31 | 52 | 0 | 73 | 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 53 is in line with the area's typical annual median of 53.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Baton Rouge
The latest EPA AirNow observation puts Baton Rouge's AQI at 57 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Baton Rouge air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Baton Rouge, LA), 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.