Corpus Christi Air Quality in 2021
In 2021, Corpus Christi's air quality (Corpus Christi, TX area) had a median daily AQI of 47 (Good) across 364 monitored days. 2 days (0.5%) reached Unhealthy for Sensitive Groups or worse, 200 were Good, and the year's peak AQI was 113 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 236 of those days. The cleanest month of 2021 was December (median AQI 38, 0 days above 100) and the worst was January (median 46, 1 day above 100, peak 113).
- Good: 54.9%
- Moderate: 44.5%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
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How was Corpus Christi's air quality in 2021?
Good on a typical day: median AQI 47, with 2 days above AQI 100 out of 364 monitored — the 3rd cleanest of 7 years on record for the area.
- ✓Peak AQI in 2021: 113 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 236 days.
- ✓Cleanest month: December; worst: January.
Frequently asked questions
What was the average AQI in Corpus Christi in 2021?▾
EPA's Air Quality System puts Corpus Christi's (Corpus Christi, TX) median daily AQI for 2021 at 47, which is Good. 2 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 113.
Which month had the worst air quality in Corpus Christi in 2021?▾
The cleanest month of 2021 was December (median AQI 38, 0 days above 100) and the worst was January (median 46, 1 day above 100, peak 113).
Was 2021 a good or bad year for Corpus Christi's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2021 ranks 3rd cleanest by days above AQI 100. 2021's median of 47 is in line with the area's typical annual median of 48.
Corpus Christi month by month in 2021
Corpus Christi air quality month by month, 2021 (Corpus Christi, TX, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| Januaryworst | 31 | 46 | 1 | 113 | PM2.5 |
| February | 27 | 53 | 0 | 63 | PM2.5 |
| March | 31 | 53 | 0 | 80 | PM2.5 |
| April | 30 | 58 | 0 | 95 | PM2.5 |
| May | 31 | 50 | 0 | 84 | PM2.5 |
| June | 30 | 49 | 0 | 74 | PM2.5 |
| July | 31 | 52 | 0 | 79 | PM2.5 |
| August | 31 | 52 | 0 | 77 | PM2.5 |
| September | 30 | 54 | 0 | 97 | PM2.5 |
| October | 31 | 40 | 1 | 105 | O3 |
| November | 30 | 39 | 0 | 51 | O3 |
| Decembercleanest | 31 | 38 | 0 | 97 | PM2.5 |
How 2021 compares
Among the 7 years EPA has published for the area (2019–2025), 2021 ranks 3rd cleanest by days above AQI 100.
2021's median of 47 is in line with the area's typical annual median of 48.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Corpus Christi
The latest EPA AirNow observation puts Corpus Christi's AQI at 38 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Corpus Christi air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Corpus Christi, 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.