Stay updated with real-time air quality in Merthyr Tydfil, 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)
35
Good
Merthyr Tydfil, Wales
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.84 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
10.71 μg/m³
0
55
155
255
425
605+
37.67 ppb
0
55
71
86
201
201+
0.25 ppb
0
36
76
186
605
1005+
2.13 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Merthyr Tydfil, Wales
Merthyr Tydfil, Wales
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AQI 35
Good
4.51μg/m³
PM2.5
10.50μg/m³
PM10
38.11ppb
O3
0.24ppb
SO2
2.24ppb
NO2
0.12ppm
CO
AQI 34
Good
4.70μg/m³
PM2.5
11.28μg/m³
PM10
37.36ppb
O3
0.24ppb
SO2
2.25ppb
NO2
0.12ppm
CO
AQI 34
Good
4.45μg/m³
PM2.5
11.65μg/m³
PM10
36.81ppb
O3
0.23ppb
SO2
2.17ppb
NO2
0.12ppm
CO
AQI 35
Good
4.43μg/m³
PM2.5
11.91μg/m³
PM10
37.81ppb
O3
0.29ppb
SO2
2.49ppb
NO2
0.13ppm
CO
AQI 34
Good
4.38μg/m³
PM2.5
12.12μg/m³
PM10
36.63ppb
O3
0.30ppb
SO2
3.11ppb
NO2
0.13ppm
CO
AQI 33
Good
4.58μg/m³
PM2.5
12.59μg/m³
PM10
35.69ppb
O3
0.32ppb
SO2
3.95ppb
NO2
0.13ppm
CO
Air quality measurements for Wales, UK meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Merthyr Tydfil, Wales is updated on an hourly basis.
The worst air quality in Merthyr Tydfil, Wales was recorded at 01:00:00 on 2025-12-28.
The best air quality in Merthyr Tydfil, Wales was recorded at 01:00:00 on 2025-12-28.
The real-time air quality index in Merthyr Tydfil, Wales is 35, currently categorized as Good.
The most common pollutant in Merthyr Tydfil, Wales is O3.
If the air quality in Merthyr Tydfil, Wales is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Merthyr Tydfil, Wales at present are 4.844 μg/m3.
The current PM10 levels in Merthyr Tydfil, Wales are 10.706 μg/m3.
The current carbon monoxide (CO) level in Merthyr Tydfil, Wales is 0.122 ppm.
The current sulfur dioxide (SO2) levels in Merthyr Tydfil, Wales are 0.252 ppb.
The current ozone (O3) levels at Merthyr Tydfil, Wales is 37.669 ppm.
The current nitrogen dioxide (NO2) levels at Merthyr Tydfil, Wales is 2.131 ppb.
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