Brownsville Air Quality in 2019
In 2019, Brownsville's air quality (Brownsville-Harlingen, TX area) had a median daily AQI of 52 (Moderate) across 365 monitored days. 0 days (0.0%) reached Unhealthy for Sensitive Groups or worse, 172 were Good, and the year's peak AQI was 91 (Moderate). Fine particulate matter (PM2.5) set the daily AQI on 282 of those days. The cleanest month of 2019 was January (median AQI 39, 0 days above 100) and the worst was June (median 63, 0 days above 100, peak 87).
- Good: 47.1%
- Moderate: 52.9%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How was Brownsville's air quality in 2019?
Moderate on a typical day: median AQI 52, with 0 days above AQI 100 out of 365 monitored — the 1st cleanest of 7 years on record for the area.
- ✓Peak AQI in 2019: 91 (Moderate).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 282 days.
- ✓Cleanest month: January; worst: June.
Frequently asked questions
What was the average AQI in Brownsville in 2019?▾
EPA's Air Quality System puts Brownsville's (Brownsville-Harlingen, TX) median daily AQI for 2019 at 52, which is Moderate. 0 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 91.
Which month had the worst air quality in Brownsville in 2019?▾
The cleanest month of 2019 was January (median AQI 39, 0 days above 100) and the worst was June (median 63, 0 days above 100, peak 87).
Was 2019 a good or bad year for Brownsville's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2019 ranks 1st cleanest by days above AQI 100 — the best year on record here. 2019's median of 52 is in line with the area's typical annual median of 52.
Brownsville month by month in 2019
Brownsville air quality month by month, 2019 (Brownsville-Harlingen, TX, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| Januarycleanest | 31 | 39 | 0 | 65 | PM2.5 |
| February | 28 | 51 | 0 | 91 | PM2.5 |
| March | 31 | 53 | 0 | 77 | PM2.5 |
| April | 30 | 58 | 0 | 89 | O3 |
| May | 31 | 59 | 0 | 87 | PM2.5 |
| Juneworst | 30 | 63 | 0 | 87 | PM2.5 |
| July | 31 | 54 | 0 | 76 | PM2.5 |
| August | 31 | 54 | 0 | 79 | PM2.5 |
| September | 30 | 39 | 0 | 53 | PM2.5 |
| October | 31 | 41 | 0 | 65 | PM2.5 |
| November | 30 | 50 | 0 | 79 | PM2.5 |
| December | 31 | 46 | 0 | 72 | PM2.5 |
How 2019 compares
Among the 7 years EPA has published for the area (2019–2025), 2019 ranks 1st cleanest by days above AQI 100 — the best year on record here.
2019's median of 52 is in line with the area's typical annual median of 52.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Brownsville
The latest EPA AirNow observation puts Brownsville's AQI at 40 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Brownsville air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Brownsville-Harlingen, 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.