Worst air pollution Llangefni, today and tomorrow
Today (16 July): Air quality in Llangefni 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: 28.4/100).
Tomorrow (17 July 2026): Air quality in Llangefni is fair. All pollutants stay as today. Pollution peaks around 2:00 PM (O3: 29.3/100). 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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Llangefni sits within Isle of Anglesey, and its air quality profile is driven mainly by road traffic and the density of the centre. The dominant maritime airflow tend to disperse pollutants reasonably well, keeping readings close to typical UK small-town levels. The nearby A40 corridor contributes steady vehicle emissions that affect roadside readings.
Today - 16 July | Pollution peaks at 15:00
AQI:
Fair
28.4/100
PM2.5 (fine particles):
Good
10.9/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Good
9.2/100
O3 (ozone):
Fair
28.4/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
8.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Fair
29.3/100
PM2.5 (fine particles):
Good
14.4/100
PM10 (coarse particles):
Good
5.2/100
NO2 (nitrogen dioxide):
Good
12.4/100
O3 (ozone):
Fair
29.3/100
SO2 (sulfur dioxide):
Good
3.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.1/100
PM1 (ultrafine particles):
Good
11.5/100
Pollen forecast in Llangefni
View pollen forecastFrequently Asked Questions
Is air quality bad in Llangefni right now?
On 16 July 2026, overall air quality in Llangefni is fair. AQI is the main air quality indicator at 28.4/100. Pollution peaks around 3:00 PM (O3: 28.4/100).
Will air quality be worse tomorrow in Llangefni?
On 17 July 2026, air quality conditions in Llangefni will be similar to today, with AQI forecast at fair at 29.3/100. Pollution peaks around 2:00 PM (O3: 29.3/100).
When is air pollution at its worst in Llangefni?
You can roughly predict Llangefni's air quality just by knowing the time of year. Winter tends to be worst, with wood burning, home heating, and still, cold air trapping traffic fumes from the A40 closer to ground level. Come summer, it's ozone rather than particulates that's the bigger concern, especially on still, sunny days. For much of spring and autumn, things settle into a fairly unremarkable middle ground.
Are air quality levels in Llangefni 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