Houston air quality today
Air quality in Houston is currently moderate, with a European index of 41. The concentration of PM2.5 particles is 17 µg/m³ and PM10 is 19 µg/m³. Very sensitive people may notice mild symptoms during prolonged outdoor exertion. Over the next 24 hours the air will be cleanest around 6:00 AM (index 33) and most polluted around 3:00 PM (index 77).
Current air quality in Houston
Moderate
41EAQI
Very sensitive people may notice mild symptoms during prolonged outdoor exertion.
- PM2.5
- 17 µg/m³
- PM10
- 19 µg/m³
- Ozone
- 67 µg/m³
Model estimate (Open-Meteo / CAMS) for the city location. It may differ from readings at local stations.
The next 24 hours at a glance
- Index now
- 41
- Moderate
- Average index
- 49
- Moderate
- Cleanest air
- 6:00 AM
- index 33
- Most polluted hour
- 3:00 PM
- index 77
- PM2.5
- 17 µg/m³
- PM10
- 19 µg/m³
Air quality in Houston by the hour
- 41Now
- 411 AM
- 412 AM
- 403 AM
- 384 AM
- 355 AM
- 336 AM
- 337 AM
- 358 AM
- 359 AM
- 3610 AM
- 3911 AM
- 5312 PM
- 691 PM
- 752 PM
- 773 PM
- 764 PM
- 715 PM
- 636 PM
- 497 PM
- 448 PM
- 469 PM
- 4810 PM
- 4911 PM
European Air Quality Index (EAQI) by the hour, a model estimate. A shorter bar means cleaner air.
Pollen in Houston
Pollen data is not available for this location. The pollen model only covers Europe.
Frequently asked questions
How is the air quality in Houston today?
It is currently moderate (European index 41). PM2.5 is 17 µg/m³, PM10 is 19 µg/m³ and ozone is 67 µg/m³. The average for the next 24 hours is around 49.
What does the European Air Quality Index (EAQI) mean?
The EAQI is a scale used by the European Environment Agency. Up to 20 is excellent air, up to 40 good, up to 60 moderate, up to 80 poor, up to 100 very poor, and above 100 extremely poor. The index is calculated from the concentration of fine particles (PM2.5 and PM10), ozone, nitrogen dioxide and sulphur dioxide.
What are PM2.5 and PM10 particles?
They are tiny particles in the air with a diameter of up to 2.5 and 10 micrometres. They come from traffic, heating and industry, and there are the most of them in winter, on calm days without wind or rain. PM2.5 is more dangerous because it penetrates deep into the lungs.
Are these measurements or estimates?
This is an atmospheric model estimate (Open-Meteo / CAMS) for the city location, not a reading from a local station. Values may therefore differ from station data in some parts of the city.
When is the air cleanest?
The air is usually cleaner during stronger winds, after rain and in the afternoon, when the cold layer near the ground breaks up. It is worst early in the morning and in the evening in the cold part of the year, when heating and traffic increase.