Cardiff air quality today
Air quality in Cardiff is currently good, with a European index of 22. The concentration of PM2.5 particles is 2 µg/m³ and PM10 is 3 µg/m³. The air is good and safe to spend time outdoors. Over the next 24 hours the air will be cleanest around 06:00 (index 22) and most polluted around 13:00 (index 32).
Current air quality in Cardiff
Good
22EAQI
The air is good and safe to spend time outdoors.
- PM2.5
- 2 µg/m³
- PM10
- 3 µg/m³
- Ozone
- 63 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
- 22
- Good
- Average index
- 27
- Good
- Cleanest air
- 06:00
- index 22
- Most polluted hour
- 13:00
- index 32
- PM2.5
- 2 µg/m³
- PM10
- 3 µg/m³
Air quality in Cardiff by the hour
- 22Now
- 2407:00
- 2608:00
- 2809:00
- 3010:00
- 3111:00
- 3112:00
- 3213:00
- 3214:00
- 3115:00
- 3116:00
- 3117:00
- 2918:00
- 2719:00
- 2620:00
- 2521:00
- 2422:00
- 2423:00
- 2400:00
- 2401:00
- 2402:00
- 2403:00
- 2504:00
- 2505:00
European Air Quality Index (EAQI) by the hour, a model estimate. A shorter bar means cleaner air.
Pollen in Cardiff
No pollen is currently detected in the air.
Model estimate (Open-Meteo / CAMS). It may differ from local measurements.
Frequently asked questions
How is the air quality in Cardiff today?
It is currently good (European index 22). PM2.5 is 2 µg/m³, PM10 is 3 µg/m³ and ozone is 63 µg/m³. The average for the next 24 hours is around 27.
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.