Texas air quality

Cotulla, Texas Air Quality

La Salle County28.437, -99.235

The nearest reporting area, Laredo, measured an index of 25 this hour, which is Good. Texas Commission on Environmental Quality forecasts Moderate for Laredo today and Moderate tomorrow. NOAA’s analysts drew light wildfire smoke over the town today.

Measured now
25 · Good
Today
— · Moderate
Tomorrow
— · Moderate
Pollutant
Ozone

Fine particles on the map

Forecast fine particulate matter from NOAA’s National Air Quality Forecast Capability over Cotulla, Texas. Open it for the live map, where it pans and zooms.

Forecast fine particulate matter from NOAA’s National Air Quality Forecast Capability over Cotulla, Texas Open the live map with the particulate forecast

Map layer from NOAA National Air Quality Forecast Capability. Boundaries from the Iowa Environmental Mesonet.

Alerts in force

An Air Quality Alert is issued by the National Weather Service on behalf of a state or local agency when pollution is expected to reach a level that harms health. An Air Stagnation Advisory means the air will not move enough to clear what is already in it.

None are in force near Cotulla right now. All Texas warnings.

Now

Good

Reporting area
Laredo, TX, 66 miles away
Reported by
Texas Commission on Environmental Quality
Area index
25 · Good

Measured, not modeled. AirNow observations are preliminary until the operating agency certifies them, which happens months later.

Today and tomorrow

Texas Commission on Environmental Quality's own forecast for Laredo, written by a forecaster rather than read off a model.

DayCategoryIndexPollutant
TodayModeratePM2.5
TomorrowModeratePM2.5
Tuesday, September 22ModeratePM2.5

Hour by hour

NOAA’s National Air Quality Forecast Capability, bias-corrected against monitors, for this town’s own coordinate. The worst hour ahead is an index of 43, Good, around Tue, 7:00 PM CDT, from the run issued Sun, 7:00 AM CDT. This is a model, not a measurement.

HourIndexCategoryPM2.5Ozone
Sun, 9:00 AM CDT31Good6.3
Sun, 10:00 AM CDT37Good7.6
Sun, 11:00 AM CDT38Good7.3
Sun, 12:00 PM CDT39Good7.5
Sun, 1:00 PM CDT39Good7.1
Sun, 2:00 PM CDT37Good6.1
Sun, 3:00 PM CDT32Good4.528.7
Sun, 4:00 PM CDT30Good5.130.8
Sun, 5:00 PM CDT30Good4.932.6
Sun, 6:00 PM CDT31Good5.533.8
Sun, 7:00 PM CDT31Good5.434.9
Sun, 8:00 PM CDT32Good4.135.4
Sun, 9:00 PM CDT32Good4.335.1
Sun, 10:00 PM CDT31Good5.134.8
Sun, 11:00 PM CDT31Good4.834.1
Mon, 12:00 AM CDT30Good4.932.8
Mon, 1:00 AM CDT29Good5.131.3
Mon, 2:00 AM CDT28Good5.829.7
Mon, 3:00 AM CDT31Good6.227.6
Mon, 4:00 AM CDT33Good6.625.7
Mon, 5:00 AM CDT31Good524.3
Mon, 6:00 AM CDT30Good5.222.8
Mon, 7:00 AM CDT28Good4.521.7
Mon, 8:00 AM CDT25Good3.921
Mon, 9:00 AM CDT27Good5.620.5
Mon, 10:00 AM CDT33Good7.120.5
Mon, 11:00 AM CDT33Good6.321
Mon, 12:00 PM CDT36Good6.921.8
Mon, 1:00 PM CDT34Good622.9
Mon, 2:00 PM CDT32Good5.124.1
Mon, 3:00 PM CDT27Good3.825.6
Mon, 4:00 PM CDT27Good4.827.3
Mon, 5:00 PM CDT26Good4.528.9
Mon, 6:00 PM CDT28Good4.930.2
Mon, 7:00 PM CDT29Good4.831.4
Mon, 8:00 PM CDT30Good3.832.4
Mon, 9:00 PM CDT31Good4.233.2
Mon, 10:00 PM CDT31Good533.9
Mon, 11:00 PM CDT31Good5.133.2
Tue, 12:00 AM CDT30Good532.1
Tue, 1:00 AM CDT28Good4.530.6
Tue, 2:00 AM CDT27Good4.529.1
Tue, 3:00 AM CDT26Good4.527
Tue, 4:00 AM CDT26Good4.924.7
Tue, 5:00 AM CDT25Good4.122.2
Tue, 6:00 AM CDT24Good4.419.6
Tue, 7:00 AM CDT24Good4.118.1
Tue, 8:00 AM CDT23Good3.717.1
Tue, 9:00 AM CDT26Good5.716.7
Tue, 10:00 AM CDT33Good7.317.1
Tue, 11:00 AM CDT34Good6.318.2
Tue, 12:00 PM CDT37Good7.319.8
Tue, 1:00 PM CDT38Good7.222
Tue, 2:00 PM CDT39Good7.124.8
Tue, 3:00 PM CDT37Good6.327.8
Tue, 4:00 PM CDT38Good7.130.8
Tue, 5:00 PM CDT38Good733.7
Tue, 6:00 PM CDT41Good7.835.6
Tue, 7:00 PM CDT43Good8.137.1
Tue, 8:00 PM CDT41Good7.137.7
Tue, 9:00 PM CDT38Good6.137.8
Tue, 10:00 PM CDT37Good6.137.7
Tue, 11:00 PM CDT36Good6.136.5
Wed, 12:00 AM CDT34Good5.734.8
Wed, 1:00 AM CDT33Good5.732.6
Wed, 2:00 AM CDT33Good5.830.1
Wed, 3:00 AM CDT33Good5.827.5
Wed, 4:00 AM CDT33Good6.425
Wed, 5:00 AM CDT32Good5.222.5
Wed, 6:00 AM CDT31Good5.719.7
Wed, 7:00 AM CDT31Good5.517.7

Fine particles in micrograms per cubic meter, ozone in parts per billion as an 8-hour average. The index for each hour is EPA’s: the ozone figure is already the 8-hour average the ozone index is defined on, and the particle figure is run through EPA’s NowCast, which is how an hourly PM2.5 concentration becomes an index.

Smoke

NOAA’s Hazard Mapping System analysts drew light smoke over Cotulla in satellite imagery today (Sun, 3:00 PM CDT to Sun, 6:30 PM CDT). That is smoke seen from above; it is not always smoke at ground level.

NOAA’s model forecasts near-surface smoke peaking at 0.2 µg/m³ around Sat, 10:00 PM CDT.

Smoke on the radar over Cotulla

What this means

Good

Air quality is satisfactory, and air pollution poses little or no risk.

Who is affected
Nobody is expected to be affected.
What to do
It is a good day to be outside.
Index range
0 to 50

Category descriptions are the Environmental Protection Agency’s own.

What these numbers are. An index beside a monitor’s name is a measurement, published hourly by AirNow and preliminary until the operating agency certifies it. A category for today or tomorrow is a state or local agency forecaster’s own forecast for a reporting area. An hourly index is NOAA’s air quality model on a five-kilometer grid, not a reading from any instrument. Where a town has no monitor within reach, only the model figures appear, and the page says so.

Nearby

The nearest towns with a page of their own, closest first.

Weather forecast for CotullaWarnings in La Salle CountyLive radar over CotullaTexas air quality

Sources

Observations and daily forecasts from AirNow, the US Environmental Protection Agency’s program with NOAA, the National Park Service, NASA, tribal, state and local agencies. Hourly forecasts from NOAA’s National Air Quality Forecast Capability. Smoke analysis from NOAA’s Hazard Mapping System. Alerts from the National Weather Service. Index categories and breakpoints are EPA’s, as revised in 2024.