Corpus Christi Best & Worst AQI Days: Air Quality Guide
The worst air quality day on record for Corpus Christi (Corpus Christi, TX area) was June 26, 2020, when the daily AQI reached 162 (Unhealthy), set by fine particulate matter (PM2.5), in wildfire smoke season. Across 2,556 monitored days in 2019–2025, 3 of the 10 worst days were Unhealthy (AQI 151+) or worse; 9 of the 10 were driven by fine particulate matter (PM2.5) and 1 by coarse dust (PM10), and 6 of them fell in 2024. The cleanest day was November 10, 2023 at AQI 12 (Good); the 10 best days span 6 different years.
Reduce Indoor Ozone in Corpus Christi
Today's main pollutant in Corpus Christi is ground-level ozone (AQI 28). 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.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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When were Corpus Christi's worst and best air quality days?
Worst: June 26, 2020, AQI 162 (Unhealthy, PM2.5). Best: November 10, 2023, AQI 12 (Good). Based on 2,556 EPA-monitored days in the Corpus Christi, TX area, 2019–2025.
- ✓3 of the 10 worst days were Unhealthy (AQI 151+) or worse; the 10th-worst was AQI 119 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) drove 9 of the 10 worst days.
- ✓2024 accounts for 6 of the 10 worst days.
Frequently asked questions
What was the worst air quality day in Corpus Christi?▾
June 26, 2020: the Corpus Christi, TX area's daily AQI hit 162 (Unhealthy), driven by fine particulate matter (PM2.5), in wildfire smoke season. That is the highest of 2,556 monitored days in 2019–2025.
What was the best air quality day in Corpus Christi?▾
November 10, 2023, with a daily AQI of 12 (Good). The daily AQI is the highest reading from any monitor in the area, so even the cleanest day reflects the area's worst monitor.
What was Corpus Christi's worst air quality day in 2025?▾
March 4, 2025, AQI 137 (Unhealthy for Sensitive Groups), set by coarse dust (PM10).
Which pollutant causes Corpus Christi's worst air days?▾
Fine particulate matter (PM2.5) set the AQI on 9 of the 10 worst days; coarse dust (PM10) on 1. The tables above list the defining pollutant for every day.
Corpus Christi's 10 worst air quality days, 2019–2025
Highest daily AQI recorded for the Corpus Christi, TX area (EPA AQS). The daily AQI is the highest reading from any monitor in the area that day.
| # | Date | AQI | Category | Defining pollutant |
|---|---|---|---|---|
| 1 | (2020 page) | 162 | Unhealthy | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
| 2 | (2020 page) | 159 | Unhealthy | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
| 3 | (2024 page) | 153 | Unhealthy | PM2.5 — fine particulate matter (PM2.5) |
| 4 | (2024 page) | 149 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5) |
| 5 | (2024 page) | 138 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
| 6 | (2025 page) | 137 | Unhealthy for Sensitive Groups | PM10 — coarse dust (PM10) |
| 7 | (2024 page) | 129 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5) |
| 8 | (2024 page) | 128 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5) |
| 9 | (2025 page) | 120 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5) |
| 10 | (2024 page) | 119 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season |
Worst day of each year in Corpus Christi
The single highest-AQI day in each year on record. Click a year for its full month-by-month statistics.
| Year | Worst day | AQI | Category | Defining pollutant |
|---|---|---|---|---|
| 2019 | 107 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5) | |
| 2020 | 162 | Unhealthy | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season | |
| 2021 | 113 | Unhealthy for Sensitive Groups | PM10 — coarse dust (PM10) | |
| 2022 | 106 | Unhealthy for Sensitive Groups | PM2.5 — fine particulate matter (PM2.5), in wildfire smoke season | |
| 2023 | 101 | Unhealthy for Sensitive Groups | O3 — ground-level ozone, in peak ozone season | |
| 2024 | 153 | Unhealthy | PM2.5 — fine particulate matter (PM2.5) | |
| 2025 | 137 | Unhealthy for Sensitive Groups | PM10 — coarse dust (PM10) |
Corpus Christi's 10 best air quality days, 2019–2025
Lowest daily AQI recorded for the Corpus Christi, TX area. Ties are listed most recent first.
| # | Date | AQI | Category | Defining pollutant |
|---|---|---|---|---|
| 1 | (2023 page) | 12 | Good | O3 — ground-level ozone |
| 2 | (2025 page) | 19 | Good | O3 — ground-level ozone |
| 3 | (2023 page) | 19 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 4 | (2020 page) | 19 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 5 | (2019 page) | 19 | Good | O3 — ground-level ozone |
| 6 | (2023 page) | 20 | Good | PM2.5 — fine particulate matter (PM2.5) |
| 7 | (2023 page) | 21 | Good | O3 — ground-level ozone |
| 8 | (2022 page) | 21 | Good | O3 — ground-level ozone |
| 9 | (2022 page) | 21 | Good | O3 — ground-level ozone, in peak ozone season |
| 10 | (2021 page) | 21 | Good | O3 — ground-level ozone |
Right now in Corpus Christi
The latest EPA AirNow observation puts Corpus Christi's AQI at 28 (O3). The days above are historical records, 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.