Worst air pollution Merthyr Tudful, today and tomorrow
Today (16 July): Air quality in Merthyr Tudful is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 34.0/100).
Tomorrow (17 July 2026): Air quality in Merthyr Tudful is fair. AQI improves to medium; NO2 increases to fair; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 43.6/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Like much of Merthyr Tydfil, Merthyr Tudful's air quality is shaped less by industry these days and more by everyday road traffic. Traffic on the A483 is the most significant local emissions source, especially at peak times. Inland breezes from the surrounding countryside offer a degree of natural ventilation, keeping pollution broadly in line with comparable UK towns.
Today - 16 July | Pollution peaks at 15:00
AQI:
Fair
34.0/100
PM2.5 (fine particles):
Good
9.5/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Good
14.8/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
9.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Medium
43.6/100
PM2.5 (fine particles):
Good
13.0/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Fair
20.7/100
O3 (ozone):
Medium
43.6/100
SO2 (sulfur dioxide):
Good
2.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
12.1/100
Pollen forecast in Merthyr Tudful
View pollen forecastFrequently Asked Questions
Is air quality bad in Merthyr Tudful right now?
On 16 July 2026, overall air quality in Merthyr Tudful is fair. AQI is the main air quality indicator at 34.0/100. Pollution peaks around 3:00 PM (O3: 34.0/100).
Will air quality be worse tomorrow in Merthyr Tudful?
On 17 July 2026, air quality conditions in Merthyr Tudful will be similar to today, with NO2 forecast at fair at 20.7/100. Pollution peaks around 4:00 PM (O3: 43.6/100).
When is air pollution at its worst in Merthyr Tudful?
There's a clear yearly cycle to air quality in Merthyr Tudful if you look closely. Warmer months swap one problem for another — less smoke and heating pollution, but more ozone on the sunniest days. Through the colder months, readings near the A483 often rise, since chimney smoke and stagnant air stop pollutants clearing away. Spring and autumn are typically the easiest months, air-quality-wise, for most residents.
Are air quality levels in Merthyr Tudful based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app