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)
27
Good
Cardiff, Wales
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.07 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.93 μg/m³
0
55
155
255
425
605+
23.79 ppb
0
55
71
86
201
201+
0.68 ppb
0
36
76
186
605
1005+
15.89 ppb
0
54
101
361
1250
2050+
0.80 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Cardiff, Wales
Cardiff, Wales
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AQI 27
Good
5.20μg/m³
PM2.5
21.53μg/m³
PM10
28.48ppb
O3
0.68ppb
SO2
22.82ppb
NO2
1.01ppm
CO
AQI 33
Good
6.07μg/m³
PM2.5
20.70μg/m³
PM10
26.51ppb
O3
0.67ppb
SO2
21.40ppb
NO2
1.01ppm
CO
AQI 38
Good
6.81μg/m³
PM2.5
16.81μg/m³
PM10
29.89ppb
O3
0.67ppb
SO2
9.59ppb
NO2
1.01ppm
CO
AQI 44
Good
7.88μg/m³
PM2.5
23.23μg/m³
PM10
26.98ppb
O3
0.60ppb
SO2
15.67ppb
NO2
1.01ppm
CO
AQI 44
Good
7.52μg/m³
PM2.5
18.35μg/m³
PM10
23.37ppb
O3
0.66ppb
SO2
19.87ppb
NO2
1.01ppm
CO
AQI 52
Moderate
9.63μg/m³
PM2.5
17.78μg/m³
PM10
18.66ppb
O3
0.69ppb
SO2
18.26ppb
NO2
1.01ppm
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 02:00:00, 2026-02-11.
The best air quality in Cardiff, Wales was observed at 01:00:00 on 2026-02-11.
The air quality in Cardiff, Wales right now is Good, with an AQI of 27.
In Cardiff, Wales, PM2.5 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 5.069 μg/m3.
Cardiff, Wales currently has a PM10 concentration of 22.93 μg/m3.
The current carbon monoxide (CO) level in Cardiff, Wales is 0.803 ppm.
The current sulfur dioxide (SO2) concentration in Cardiff, Wales is 0.679 ppb.
Cardiff, Wales currently has an ozone (O3) concentration of 23.788 ppm.
The current level of nitrogen dioxide (NO2) in Cardiff, Wales is 15.886 ppb.
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