Worst air pollution Derry, today and tomorrow
Today (16 July): Air quality in Derry is fair. AQI, PM2.5, O3, and PM1 are fair; PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 11:00 PM (O3: 28.9/100).
Tomorrow (17 July 2026): Air quality in Derry is fair. All pollutants stay as today. Pollution peaks around 12:00 AM (O3: 29.0/100). 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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Being part of Derry and Strabane, Derry sees an air quality profile that's largely down to traffic and general town-centre activity. Northwesterly winds off the coast offer a degree of natural ventilation, keeping pollution broadly in line with comparable UK towns. The A46 sees the heaviest traffic, and that shows up clearly in local roadside monitoring.
Today - 16 July | Pollution peaks at 23:00
AQI:
Fair
28.9/100
PM2.5 (fine particles):
Fair
25.4/100
PM10 (coarse particles):
Good
9.7/100
NO2 (nitrogen dioxide):
Good
1.4/100
O3 (ozone):
Fair
28.9/100
SO2 (sulfur dioxide):
Good
2.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.7/100
PM1 (ultrafine particles):
Fair
20.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 00:00
AQI:
Fair
29.0/100
PM2.5 (fine particles):
Fair
25.6/100
PM10 (coarse particles):
Good
10.0/100
NO2 (nitrogen dioxide):
Good
3.9/100
O3 (ozone):
Fair
29.0/100
SO2 (sulfur dioxide):
Good
3.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Fair
20.1/100
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Frequently Asked Questions
Is air quality bad in Derry right now?
On 16 July 2026, overall air quality in Derry is fair. AQI is the main air quality indicator at 28.9/100. Pollution peaks around 11:00 PM (O3: 28.9/100).
Will air quality be worse tomorrow in Derry?
On 17 July 2026, air quality conditions in Derry will be similar to today, with AQI forecast at fair at 29.0/100. Pollution peaks around 12:00 AM (O3: 29.0/100).
When is air pollution at its worst in Derry?
Seasons make a real difference to air quality in Derry, more than most people realise. Come summer, it's ozone rather than particulates that's the bigger concern, especially on still, sunny days. Once the heating goes on and the air turns still, pollution from the A46 and nearby chimneys tends to build up rather than clear. Spring and autumn are typically the easiest months, air-quality-wise, for most residents.
Are air quality levels in Derry 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