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)
33
Good
Cardiff, Wales
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.14 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.04 μg/m³
0
55
155
255
425
605+
35.54 ppb
0
55
71
86
201
201+
0.59 ppb
0
36
76
186
605
1005+
1.08 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Cardiff, Wales
Cardiff, Wales
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AQI 34
Good
3.37μg/m³
PM2.5
14.26μg/m³
PM10
36.65ppb
O3
0.65ppb
SO2
1.08ppb
NO2
0.30ppm
CO
AQI 34
Good
3.93μg/m³
PM2.5
14.91μg/m³
PM10
36.70ppb
O3
0.65ppb
SO2
1.06ppb
NO2
0.30ppm
CO
AQI 38
Good
4.79μg/m³
PM2.5
14.26μg/m³
PM10
41.12ppb
O3
0.65ppb
SO2
1.16ppb
NO2
0.30ppm
CO
AQI 33
Good
4.03μg/m³
PM2.5
13.96μg/m³
PM10
36.47ppb
O3
0.67ppb
SO2
1.19ppb
NO2
0.30ppm
CO
AQI 33
Good
4.93μg/m³
PM2.5
15.92μg/m³
PM10
36.39ppb
O3
0.65ppb
SO2
1.00ppb
NO2
0.30ppm
CO
AQI 33
Good
5.89μg/m³
PM2.5
17.66μg/m³
PM10
35.89ppb
O3
0.64ppb
SO2
0.63ppb
NO2
0.30ppm
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 09:00:00, 2025-06-03.
The best air quality in Cardiff, Wales was observed at 11:00:00 on 2025-06-03.
The air quality in Cardiff, Wales right now is Good, with an AQI of 33.
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 3.144 μg/m3.
Cardiff, Wales currently has a PM10 concentration of 14.045 μg/m3.
The current carbon monoxide (CO) level in Cardiff, Wales is 0.277 ppm.
The current sulfur dioxide (SO2) concentration in Cardiff, Wales is 0.586 ppb.
Cardiff, Wales currently has an ozone (O3) concentration of 35.536 ppm.
The current level of nitrogen dioxide (NO2) in Cardiff, Wales is 1.08 ppb.
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