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Air quality in Ulster

Air quality index (AQI⁺) and PM2.5 air pollution in Ulster • 20:48, Oct 28

Environmental Protection Agency (EPA) of IrelandIreland Air Quality e-Reporting monitoring network for compliance and informative reporting
Environmental Protection Agency (EPA) of IrelandIreland Air Quality e-Reporting monitoring network for compliance and informative reporting

Live most polluted city ranking

Real-time Ulster most polluted city ranking

#CitiesAQI⁺ US
1
The national flag of Ireland

Letterkenny

65

2
The national flag of Ireland

Carndonagh

57

3
The national flag of Ireland

Cavan

57

4
The national flag of Ireland

Buncrana

55

5
The national flag of Ireland

Monaghan

44

Live cleanest city ranking

Real-time Ulster cleanest city ranking

#CitiesAQI⁺ US
1
The national flag of Ireland

Monaghan

44

2
The national flag of Ireland

Buncrana

55

3
The national flag of Ireland

Carndonagh

57

4
The national flag of Ireland

Cavan

57

5
The national flag of Ireland

Letterkenny

65

Wildfires in Ulster

Real-time information

Active fires

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Polluted skies of Almaty.
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October 28, 2026: Almaty among top 10 most polluted cities in the world

Busan Fireworks Festival
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Seasonal fireworks influence international air quality

Aerial shot of buildings in haze.
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Indonesia Air Quality Alert

Which is the most polluted city in Ulster?