Corpus Christi Air Quality in April
Across 2019–2025, Corpus Christi's April air quality had a median AQI of 57 (Moderate) over 210 monitored days in the Corpus Christi, TX area. 1.4% of April days (3 of 210) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 69.0% of days. The cleanest April on record here was 2023 (median AQI 50, 0 days above 100) and the worst was 2025 (median 69, 3 days above 100, peak AQI 112).
- Good: 31.9%
- Moderate: 66.7%
- Unhealthy for Sensitive Groups: 1.4%
- Unhealthy or worse: 0.0%
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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How is the air in Corpus Christi in April?
Moderate on a typical day: median AQI 57 across 2019–2025, with 1.4% of April days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓31.9% of April days were Good (AQI 0–50), 66.7% Moderate (51–100).
- ✓3 days of 210 reached AQI 101+; the April peak was 112.
- ✓Best April: 2023; worst April: 2025.
Frequently asked questions
What is the air quality like in Corpus Christi in April?▾
Across 2019–2025, the median daily AQI in Corpus Christi in April was 57 (Moderate). 31.9% of days were Good, 66.7% Moderate, and 1.4% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is April a good time for outdoor exercise in Corpus Christi?▾
A typical April day in Corpus Christi is Moderate (median AQI 57): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 71 of April days (1.4%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Corpus Christi's April air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 69.0% of April days in Corpus Christi. The highest April AQI recorded in 2019–2025 was 112 (Unhealthy for Sensitive Groups), in 2025.
Corpus Christi April air quality, year by year
Corpus Christi April air quality by year (Corpus Christi, TX, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 54 | 0 | 74 | O3 |
| 2020 | 30 | 57 | 0 | 88 | PM2.5 |
| 2021 | 30 | 58 | 0 | 95 | PM2.5 |
| 2022 | 30 | 56 | 0 | 82 | PM2.5 |
| 2023cleanest | 30 | 50 | 0 | 80 | PM2.5 |
| 2024 | 30 | 65 | 0 | 88 | PM2.5 |
| 2025worst | 30 | 69 | 3 | 112 | PM2.5 |
What April air means in Corpus Christi
A typical April day in Corpus Christi is Moderate (median AQI 57): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 71 of April days (1.4%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
April's median AQI of 57 is above Corpus Christi's whole-year median of 48, making it one of the area's dirtier periods. Nationally, the median April AQI across every EPA metro area (100,677 metro-days, 2019–2025) is 44, so Corpus Christi runs above the national April norm; 1.4% of its April days topped AQI 100 versus 0.7% nationally (about the same).
April is part of Corpus Christi's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Corpus Christi
The latest EPA AirNow observation puts Corpus Christi's AQI at 28 (O3). The figures above are multi-year month 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.