Stay updated with real-time air quality in Cardiff, Wales featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
40
Good
Cardiff, Wales
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.89 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.00 μg/m³
0
55
155
255
425
605+
43.37 ppb
0
55
71
86
201
201+
0.56 ppb
0
36
76
186
605
1005+
4.24 ppb
0
54
101
361
1250
2050+
0.10 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Cardiff, Wales
Cardiff, Wales
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AQI 40
Good
4.29μg/m³
PM2.5
16.99μg/m³
PM10
43.35ppb
O3
0.56ppb
SO2
4.17ppb
NO2
0.10ppm
CO
AQI 40
Good
5.23μg/m³
PM2.5
16.86μg/m³
PM10
43.18ppb
O3
0.56ppb
SO2
3.74ppb
NO2
0.10ppm
CO
AQI 49
Good
8.82μg/m³
PM2.5
15.86μg/m³
PM10
41.43ppb
O3
0.57ppb
SO2
3.85ppb
NO2
0.10ppm
CO
AQI 44
Good
8.38μg/m³
PM2.5
15.38μg/m³
PM10
39.91ppb
O3
0.57ppb
SO2
3.79ppb
NO2
0.10ppm
CO
AQI 40
Good
6.82μg/m³
PM2.5
16.80μg/m³
PM10
43.40ppb
O3
0.56ppb
SO2
2.98ppb
NO2
0.09ppm
CO
AQI 49
Good
8.70μg/m³
PM2.5
16.17μg/m³
PM10
43.66ppb
O3
0.55ppb
SO2
2.60ppb
NO2
0.09ppm
CO
The air quality data for Wales, UK is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Cardiff, Wales are available every hour.
Cardiff, Wales experienced its worst air quality at 11:00:00, 2025-06-12.
The best air quality in Cardiff, Wales was observed at 04:00:00 on 2025-06-12.
The air quality in Cardiff, Wales right now is Good, with an AQI of 40.
In Cardiff, Wales, O3 is the most frequently found pollutant.
When air quality in Cardiff, Wales is compromised, staying indoors and wearing a mask can reduce health risks.
Cardiff, Wales currently has a PM2.5 concentration of 3.89 μg/m3.
Cardiff, Wales currently has a PM10 concentration of 16.997 μg/m3.
The current carbon monoxide (CO) level in Cardiff, Wales is 0.097 ppm.
The current sulfur dioxide (SO2) concentration in Cardiff, Wales is 0.564 ppb.
Cardiff, Wales currently has an ozone (O3) concentration of 43.372 ppm.
The current level of nitrogen dioxide (NO2) in Cardiff, Wales is 4.235 ppb.
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