Baton Rouge Air Quality in Spring
Across 2019–2025, Baton Rouge's spring (March–May) air quality had a median AQI of 54 (Moderate) over 644 monitored days in the Baton Rouge, LA area. 3.1% of spring days (20 of 644) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 54.0% of days. The cleanest spring on record here was 2021 (median AQI 51, 0 days above 100) and the worst was 2023 (median 57, 6 days above 100, peak AQI 136).
- Good: 33.9%
- Moderate: 63.0%
- Unhealthy for Sensitive Groups: 3.1%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
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How is the air in Baton Rouge in spring?
Moderate on a typical day: median AQI 54 across 2019–2025, with 3.1% of spring days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓33.9% of spring days were Good (AQI 0–50), 63.0% Moderate (51–100).
- ✓20 days of 644 reached AQI 101+; the spring peak was 136.
- ✓Cleanest month: March; worst month: May.
Frequently asked questions
What is the air quality like in Baton Rouge in spring?▾
Across 2019–2025, the median daily AQI in Baton Rouge in spring was 54 (Moderate). 33.9% of days were Good, 63.0% Moderate, and 3.1% reached Unhealthy for Sensitive Groups or worse, based on 644 monitored days in EPA's Air Quality System.
Is spring a good time for outdoor exercise in Baton Rouge?▾
A typical spring day in Baton Rouge is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 32 of spring days (3.1%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Baton Rouge's spring air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 54.0% of spring days in Baton Rouge. The highest spring AQI recorded in 2019–2025 was 136 (Unhealthy for Sensitive Groups), in 2023.
Baton Rouge spring air quality, year by year
Baton Rouge spring air quality by year (Baton Rouge, LA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 92 | 52 | 5 | 112 | O3 |
| 2020 | 92 | 54 | 0 | 100 | PM2.5 |
| 2021cleanest | 92 | 51 | 0 | 100 | PM2.5 |
| 2022 | 92 | 58 | 5 | 115 | O3 |
| 2023worst | 92 | 57 | 6 | 136 | PM2.5 |
| 2024 | 92 | 54 | 4 | 119 | PM2.5 |
| 2025 | 92 | 56 | 0 | 93 | PM2.5 |
What spring air means in Baton Rouge
A typical spring day in Baton Rouge is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 32 of spring days (3.1%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Spring's median AQI of 54 is in line with Baton Rouge's whole-year median of 53, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median Spring AQI across every EPA metro area (307,196 metro-days, 2019–2025) is 43, so Baton Rouge runs above the national Spring norm; 3.1% of its Spring days topped AQI 100 versus 0.8% nationally (above average).
Within the season, March is the cleanest month (median AQI 53, 0.0% of days above 100) and May the worst (median 56, 7.8% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Baton Rouge
The latest EPA AirNow observation puts Baton Rouge's AQI at 46 (PM2.5). The figures above are multi-year season 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.