Corpus Christi Real-Time AQI Tracker
Get Alerts For Unhealthy AQI In Your Area
When air quality in your area reaches unhealthy levels, we'll send you a quick alert, along with expert tips on how to reduce your exposure.
What's Actually In Corpus Christi Air Today?
What High AQI Means for Your Lungs in Corpus Christi
How to Read AQI
The Air Quality Index (AQI) measures how polluted the air is and how it may affect your health.
0–50 (Good): Air quality is satisfactory.
51–100 (Moderate): Acceptable, but some pollutants may pose minor concerns.
101–150 (Unhealthy for Sensitive Groups)
151–200 (Unhealthy)
201–300 (Very Unhealthy)
301+ (Hazardous)
Moderate
Still okay for most, but if you have asthma or allergies, take it easy and avoid long outdoor workouts.
Shop MERV 11 filters→What's the Right Filter for Your AQI Level?
Check Today's Live Real Time Air Quality Index AQI Map in Corpus Christi, TX Now
TL;DR
The live map above shows Corpus Christi air quality right now, from Texas Commission on Environmental Quality (TCEQ) monitors. Gulf winds keep most days clean. In Filterbuy's review of state records, bad days follow two patterns: ozone after a cold front swings the wind north, and fine particles when south winds carry smoke or Saharan dust up the coast.
Key Takeaways
Nueces County meets every federal air standard, with a 2023 annual PM2.5 (fine particle) design value of 8.4.
Smoke from fires in southern Mexico and Central America peaks January through May. Saharan dust arrives in summer.
Ozone builds behind cold fronts. In Filterbuy's tally, 18 of 19 Corpus Christi Ozone Action Days from 2008 to 2023 fell between mid-August and early October.
Reading the Corpus Christi Live AQI Map, Pollutant First
The map shows Corpus Christi's Air Quality Index now, on the U.S. Environmental Protection Agency's (EPA) 0 to 500 AQI scale. Its color gives the health category, and the pollutant label shows what drives it.
Before heading out, Filterbuy suggests a two-minute check:
Read which pollutant the live map lists.
Look at the wind. North after a front points to ozone; south or southeast in spring and summer points to smoke or dust.
Open TCEQ's forecast for tomorrow.
Then act: move outdoor time for ozone, or follow the four steps below for particles.
Readings come from TCEQ's Corpus Christi-area stations through EPA AirNow, which Filterbuy's guide to EPA AirNow walks through. The Coastal Bend Air Quality Partnership, a regional coalition, adds four ozone monitors at Holly Road, Annaville, Odem, and Aransas Pass.
What Each AQI Color Means for a Day on the Bayfront
Green and yellow mean you can keep your plans. At orange or red, the table shows how to cut back.
EPA AQI categories. Filterbuy's action line is AQI 100. Filters capture particles, not ozone.
AQI 100 is Filterbuy's action line, where we tell customers to move. Check AirNow and local guidance first, then take four steps:
Put a MERV 13 filter in your HVAC system. It treats the whole house.
Set the thermostat fan to On. Auto filters only while heating or cooling.
Run a portable HEPA air cleaner in each occupied room, bedrooms first. EPA's sizing rule is a smoke CADR of at least two-thirds of the room's square feet, so a 300-square-foot bedroom needs about 200.
Close up. Shut windows and doors, and skip candles, frying, smoking, and vacuuming without a sealed unit.
The two layers do different jobs: MERV 13 in the system, HEPA in the room. Homes without ducts have no whole-home layer, so portable HEPA cleaners are the main defense there. EPA also advises avoiding air cleaners that produce ozone.
Is Corpus Christi Air Safe to Breathe Right Now?
It depends on the live reading. At 100 or below, nearly everyone is fine. Above 100, sensitive groups should cut back; above 150, everyone should. The good news: Nueces and San Patricio counties meet every federal standard, according to TCEQ's Corpus Christi attainment table, so most days stay green or yellow.
Why Corpus Christi Readings Can Disagree with the Sky
AirNow's NowCast blends recent hours, so it can trail a fast change, and Gulf humidity can make the sky look worse than the air is. The City's April 29, 2026 haze notice blamed one milky sky on humidity and Mexican smoke.
Backyard sensors caused the biggest disagreements we found: EPA found raw PurpleAir sensors overestimate PM2.5 by about 40%, so the AirNow Fire and Smoke Map corrects for humidity. Dust flips it: a NOAA-funded study of the June 2020 Saharan plume found corrected sensors read PM2.5 5 to 6 times too low, so on dust days we trust the TCEQ monitor over a neighborhood sensor.
TCEQ data posts about an hour after sampling (benzene, up to three hours), and its AQI table averages PM2.5 midnight to midnight, so it can read below AirNow's hourly NowCast during an afternoon plume.
Where Coastal Bend Residents Get Forecasts and Alerts
TCEQ publishes a daily Texas air quality forecast for Corpus Christi. Its air monitoring page also sends email and text Ozone Action Day alerts, which run here from April 1 to October 31. The Corpus Christi-Nueces County Public Health District posts local air quality updates, including a May 6, 2025 alert when Mexican smoke pushed afternoon readings near orange.
Refinery Row and What the AQI Leaves Out
TCEQ's 2024 PM2.5 designation analysis lists 2020 industrial PM2.5 emissions of 1,362.2 tons in Nueces County, versus 38.1 in neighboring Kleberg.
Even so, the AQI does not cover benzene. TCEQ tracks it near Refinery Row at its Palm, Hillcrest, and Huisache sites, per its refinery monitoring summary. Filterbuy flags this because a green map and a chemical smell can share a day. If that happens in Hillcrest, Washington-Coles, or Dona Park, report the odor to TCEQ's Region 14 office.
What Drives Corpus Christi's AQI Through the Year
Ground-level ozone rises when north winds behind a front carry nitrogen oxides from Houston or San Antonio, the Coastal Bend Air Quality Partnership explains.
Fine particulate matter (PM2.5), by contrast, is mostly imported. TCEQ points to fires in southern Mexico and Central America, mainly January through May, and to summer Saharan dust. Filterbuy's PM10 vs. PM2.5 guide explains the difference.
Sources: TCEQ, the Coastal Bend Air Quality Partnership, and Filterbuy's 2008 to 2023 Ozone Action Day tally.
How Corpus Christi Air Compares with Houston and the Valley
Corpus Christi breathes easier than its neighbors. Nueces County's 2023 annual PM2.5 design value was 8.4 micrograms per cubic meter, under EPA's 2024 limit of 9.0, while Harris County (Houston) hit 12.5 and Cameron County (Brownsville) 10.9. TCEQ issued 2 Ozone Action Days for Corpus Christi in 2023, compared with 51 for Houston.
The American Lung Association's State of the Air 2026 Texas findings rank Houston 6th worst for ozone and Brownsville 4th worst for particle spikes. Corpus Christi sits in between: far less ozone than Houston, but the Valley's imported smoke and dust. Compare the Houston, San Antonio, Brownsville, and statewide Texas live AQI maps.
Smoke from Mexico and Saharan Dust: Corpus Christi's Haziest Days
The worst particle days start far away. TCEQ's Padre Island National Seashore monitor sits where dust and smoke come ashore, and almost 83% of daily air trajectories there from 2019 to 2022 arrived from the east or southeast, so particle levels peak in spring and summer.
Follow any plume on the Corpus Christi wildfire and smoke map.
Our Take: Check the Wind Before the Number
Filterbuy, a family-owned company founded in 2013, makes its filters in Alabama, Florida, Pennsylvania, and Utah and publishes live AQI maps nationwide. For this page, we tallied TCEQ's Corpus Christi Ozone Action Days from 2008 through 2023 and counted 19 alerts, 18 of them between mid-August and early October.
Ozone is a short season here; imported particles are the bigger job for your filter. So check the wind first. A north wind usually means ozone: run early. A steady south wind in spring or summer can carry smoke or dust: check AirNow, close up, and run MERV 13 with the fan On.
Michelle Wan, Brand Manager at Filterbuy
Matching Your Air Filter to the Corpus Christi AQI
Below AQI 100, a MERV 8 or MERV 11 filter handles everyday dust and pollen. EPA recommends a MERV 13 or higher filter in central systems during smoke events. Filterbuy's line for that switch is AQI 100, dust days included. EPA also notes most furnaces and HVAC systems take MERV 13 without equipment problems when the filter is replaced often, so the only check is fit, as Filterbuy's guide to the best MERV filter for smoke explains.
On the coast, Filterbuy recommends a 2- or 4-inch filter wherever the return allows, since deeper media holds more dust. During smoke or dust, skip the calendar: check the filter and replace it when it looks dirty, dark brown or black, which EPA notes can be well before the normal interval. Keep spares on hand; auto-delivery handles that, and Filterbuy makes 600+ sizes plus custom air filters. Pleated filters capture particles, not gases such as ozone. For odors, see Filterbuy's Odor Eliminator line.
Supporting Statistics
Three numbers shape Filterbuy's Coastal Bend advice:
60 to 103 µg/m³ of PM2.5 a day.
Across the southern U.S. during the June 2020 Saharan dust plume.
EPA's daily standard is 35.
Source: Jaffe et al., 2023, via NOAA
123% faster smoke removal.
A shrouded 4-inch MERV 13 box fan beat the basic 1-inch design.
DIY units are a stopgap: use a certified fan from 2012 or newer, and never leave it running unattended.
23.7 unhealthy particle days a year.
Cameron County's average, in the nearby Rio Grande Valley.
Source: American Lung Association, State of the Air 2026, Texas
FAQs
Glossary
Air Quality Index (AQI): EPA's 0 to 500 scale with six color categories.
NowCast: AirNow's blend of recent hours into a current AQI.
PM2.5: Particles 2.5 micrometers or smaller.
Ground-level ozone: A lung irritant formed from emissions in sunlight.
TCEQ: Texas Commission on Environmental Quality, the state air agency.
Ozone Action Day: A TCEQ alert that ozone may reach unhealthy levels.
Benzene: A refinery air toxic tracked outside the AQI.
MERV: A 1 to 16 rating of HVAC filter particle capture.
HEPA: High-efficiency media for portable air cleaners.