Laredo Air Quality in 2019
In 2019, Laredo's air quality (Laredo, TX area) had a median daily AQI of 50 (Good) across 365 monitored days. 1 day (0.3%) reached Unhealthy for Sensitive Groups or worse, 187 were Good, and the year's peak AQI was 109 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 290 of those days. The cleanest month of 2019 was January (median AQI 37, 0 days above 100) and the worst was May (median 60, 1 day above 100, peak 109).
- Good: 51.2%
- Moderate: 48.5%
- Unhealthy for Sensitive Groups: 0.3%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Laredo
Today's main pollutant in Laredo is ground-level ozone (AQI 10). 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 was Laredo's air quality in 2019?
Good on a typical day: median AQI 50, with 1 day above AQI 100 out of 365 monitored — the 2nd cleanest of 7 years on record for the area.
- ✓Peak AQI in 2019: 109 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 290 days.
- ✓Cleanest month: January; worst: May.
Frequently asked questions
What was the average AQI in Laredo in 2019?▾
EPA's Air Quality System puts Laredo's (Laredo, TX) median daily AQI for 2019 at 50, which is Good. 1 day were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 109.
Which month had the worst air quality in Laredo in 2019?▾
The cleanest month of 2019 was January (median AQI 37, 0 days above 100) and the worst was May (median 60, 1 day above 100, peak 109).
Was 2019 a good or bad year for Laredo's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2019 ranks 2nd cleanest by days above AQI 100. 2019's median of 50 is above the area's typical annual median of 47.
Laredo month by month in 2019
Laredo air quality month by month, 2019 (Laredo, TX, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| Januarycleanest | 31 | 37 | 0 | 61 | PM2.5 |
| February | 28 | 54 | 0 | 96 | PM2.5 |
| March | 31 | 52 | 0 | 67 | PM2.5 |
| April | 30 | 48 | 0 | 96 | PM2.5 |
| Mayworst | 31 | 60 | 1 | 109 | PM2.5 |
| June | 30 | 57 | 0 | 82 | PM2.5 |
| July | 31 | 56 | 0 | 80 | PM2.5 |
| August | 31 | 55 | 0 | 71 | PM2.5 |
| September | 30 | 41 | 0 | 61 | PM2.5 |
| October | 31 | 41 | 0 | 56 | PM2.5 |
| November | 30 | 48 | 0 | 78 | PM2.5 |
| December | 31 | 43 | 0 | 76 | PM2.5 |
How 2019 compares
Among the 7 years EPA has published for the area (2019–2025), 2019 ranks 2nd cleanest by days above AQI 100.
2019's median of 50 is above the area's typical annual median of 47.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Laredo
The latest EPA AirNow observation puts Laredo's AQI at 10 (O3). The figures above are multi-year annual 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.