Laredo Air Quality in Fall
Across 2019–2025, Laredo's fall (September–November) air quality had a median AQI of 42 (Good) over 637 monitored days in the Laredo, TX area. 1.1% of fall days (7 of 637) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 63.6% of days. The cleanest fall on record here was 2022 (median AQI 33, 0 days above 100) and the worst was 2025 (median 52, 3 days above 100, peak AQI 121).
- Good: 73.5%
- Moderate: 25.4%
- Unhealthy for Sensitive Groups: 1.1%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Laredo
Today's main pollutant in Laredo is ground-level ozone (AQI 13). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
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How is the air in Laredo in fall?
Good on a typical day: median AQI 42 across 2019–2025, with 1.1% of fall days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓73.5% of fall days were Good (AQI 0–50), 25.4% Moderate (51–100).
- ✓7 days of 637 reached AQI 101+; the fall peak was 121.
- ✓Cleanest month: November; worst month: September.
Frequently asked questions
What is the air quality like in Laredo in fall?▾
Across 2019–2025, the median daily AQI in Laredo in fall was 42 (Good). 73.5% of days were Good, 25.4% Moderate, and 1.1% reached Unhealthy for Sensitive Groups or worse, based on 637 monitored days in EPA's Air Quality System.
Is fall a good time for outdoor exercise in Laredo?▾
A typical fall day in Laredo sits in the Good range (median AQI 42), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 91 of fall days (1.1%) reached AQI 101+ in 2019–2025.
Which pollutant causes Laredo's fall air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 63.6% of fall days in Laredo. The highest fall AQI recorded in 2019–2025 was 121 (Unhealthy for Sensitive Groups), in 2025.
Laredo fall air quality, year by year
Laredo fall air quality by year (Laredo, TX, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 91 | 42 | 0 | 78 | PM2.5 |
| 2020 | 91 | 44 | 0 | 76 | PM2.5 |
| 2021 | 91 | 41 | 0 | 86 | PM2.5 |
| 2022cleanest | 91 | 33 | 0 | 62 | PM2.5 |
| 2023 | 91 | 38 | 1 | 105 | O3 |
| 2024 | 91 | 42 | 3 | 108 | O3 |
| 2025worst | 91 | 52 | 3 | 121 | PM2.5 |
What fall air means in Laredo
A typical fall day in Laredo sits in the Good range (median AQI 42), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 91 of fall days (1.1%) reached AQI 101+ in 2019–2025.
Fall's median AQI of 42 is below Laredo's whole-year median of 47, making it one of the area's cleaner periods. Nationally, the median Fall AQI across every EPA metro area (296,275 metro-days, 2019–2025) is 40, so Laredo runs in line with the national Fall norm; 1.1% of its Fall days topped AQI 100 versus 1.5% nationally (about the same).
Within the season, November is the cleanest month (median AQI 40, 0.5% of days above 100) and September the worst (median 43, 1.9% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Laredo
The latest EPA AirNow observation puts Laredo's AQI at 13 (O3). The figures above are multi-year season statistics, not today's reading.
View current Laredo air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Laredo, TX), 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.