Houston: Air Pollution Today — AQI Index, PM2.5/PM10, Smog Alerts and Forecast

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Latest air quality data: Houston
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Pollution and air quality forecast for Houston. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Houston:
  1. particulate matter (PM2.5) dust - 15 (Moderate)
  2. particulate matter (PM10) suspended dust - 20 (Moderate)
  3. ozone (O3) - 85 (Moderate)
  4. nitrogen dioxide (NO2) - 9 (Good)
  5. sulfur dioxide (SO2) - 4 (Good)
  6. carbon monoxide (CO) - 119 (Good)
Real-time Air Quality Index (AQI) for Houston, Wednesday, August 26, 2026: 2.

air quality index: 1
AQI 2 Moderate

What is the air quality in Houston today? Is the air polluted in Houston?. Is there smog?

Today (Wednesday, August 26, 2026) air quality is moderate in Houston. Some pollutants in Houston may slightly affect very few hypersensitive individuals. Air pollutants in Houston may cause minor breathing discomfort to sensitive people.


What is the current level of PM2.5 in Houston? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 15 (Moderate) For comparison, the highest level of PM2.5 in Houston in the last 7 days was: 20 (Saturday, August 22, 2026) and the lowest: 9 (Wednesday, August 19, 2026).

What is the level of PM10 today in Houston? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Houston is: 20 (Moderate)

How is the O3 level today in Houston? (ozone (O3))
85 (Moderate)

How high is the level of NO2? (nitrogen dioxide (NO2))
9 (Good)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
4 (Good)

How high is the CO level? (carbon monoxide (CO))
119 (Good)



Current data Wednesday, August 26, 2026 at 8:00 PM

PM2,5 15 (Moderate)

PM10 20 (Moderate)

O3 85 (Moderate)

NO2 9 (Good)

SO2 4 (Good)

CO 119 (Good)

Data on air pollution from recent days in Houston

index 2026-08-26 2026-08-25 2026-08-24 2026-08-23 2026-08-22 2026-08-21 2026-08-20 2026-08-19
pm25 15
Moderate		 13
Moderate		 12
Good		 16
Moderate		 20
Moderate		 20
Moderate		 13
Moderate		 9
Good
pm10 20
Moderate		 17
Good		 15
Good		 22
Moderate		 29
Moderate		 33
Moderate		 19
Good		 13
Good
o3 62
Good		 72
Moderate		 68
Good		 69
Good		 74
Moderate		 62
Good		 55
Good		 57
Good
no2 10
Good		 8
Good		 8
Good		 9
Good		 9
Good		 9
Good		 9
Good		 8
Good
so2 3
Good		 3
Good		 3
Good		 3
Good		 3
Good		 3
Good		 3
Good		 3
Good
co 117
Good		 114
Good		 116
Good		 123
Good		 120
Good		 122
Good		 123
Good		 118
Good
data source »

Houston

Wednesday, August 26, 2026 at 8:00 PM

PM2,5 15 (Moderate)

particulate matter (PM2.5) dust

PM10 20 (Good)

particulate matter (PM10) suspended dust

O3 85 (Moderate)

ozone (O3)

NO2 8.7 (Good)

nitrogen dioxide (NO2)

SO2 3.6 (Good)

sulfur dioxide (SO2)

CO 119 (Good)

carbon monoxide (CO)

Houston

index 2026-08-19 2026-08-20 2026-08-21 2026-08-22 2026-08-23 2026-08-24 2026-08-25 2026-08-26
pm25 9.5 13 20 20 16 12 13 15
pm10 13 19 33 29 22 15 17 20
o3 57 55 62 74 69 68 72 62
no2 7.8 9 8.7 9 8.9 8.2 8.4 9.9
so2 2.7 2.7 3.2 3.2 3.2 3 3.3 3.3
co 118 123 122 120 123 116 114 117

* Pollution data source: https://openaq.org () The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — Houston

🌦️ WEATHER · 16-DAY FORECASTHouston🌤️36°Partly cloudyToday · ↑38° ↓26°💨 6 km/h · 💧 52%Mon24.08🌤️38°26°Tue25.08🌧️37°26°Wed26.08☀️37°26°Thu27.08🌧️36°26°Fri28.08🌧️38°27°Sat29.08☀️38°27°Sun30.08🌤️36°27°Mon31.08🌧️35°27°Tue1.09🌤️37°27°Wed2.09☁️38°28°Thu3.09🌧️37°28°Fri4.09🌧️34°26°Sat5.09🌧️30°26°Sun6.09🌧️31°26°Mon7.09☁️36°27°Tue8.09🌤️36°28°pollution-alert.com · August 27, 2026

16-day weather forecast for Houston: today around 38°C (partly cloudy), lows near 26°C. Daily temperature and conditions, updated every day. Strong wind (about 22 km/h) is actively clearing smog and dust away.

☀️ UV Index · 16-day Forecast — Houston

☀️ UV INDEX · 16-DAY FORECASTHouston03681111+8.2UV VERY HIGHtoday, day maxSPF 50, long sleeves and shade between 10:00-16:00.⏱ Unprotected fair skin can burn in about 25 min8Wed26.088Thu27.088Fri28.088Sat29.085Sun30.088Mon31.087Tue1.098Wed2.098Thu3.099Fri4.098Sat5.094Sun6.096Mon7.098Tue8.098Wed9.098Thu10.090-2 low3-5 moderate6-7 high8-10 very high11+ extremepollution-alert.com · August 27, 2026

The UV index in Houston today is 8.2 (very high) — unprotected fair skin can burn in about 25 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Houston — compare nearby locations.

Frequently asked questions

Is the air safe to breathe in Houston today?
The current average PM2.5 across Houston is about 15 µg/m³, rated “Moderate”. Air quality is good — outdoor activities are fine for everyone.
What is the current PM2.5 level in Houston?
Right now PM2.5 in Houston averages about 15 µg/m³ (“Moderate”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.
Which day last week had the worst air in Houston?
Over the past week, the highest daily PM2.5 in Houston was recorded on Friday, August 21 (about 20 µg/m³).
What is the UV index in Houston today?
The UV index in Houston today is 8.2 (very high) — unprotected fair skin can burn in about 25 minutes.
Does today's wind help disperse smog in Houston?
Strong wind (about 22 km/h) is actively clearing smog and dust away.
How is air quality measured?
Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.