WorldArrow icon
Arrow iconUlster

Air quality in Ulster

Air quality index (AQI⁺) and PM2.5 air pollution in Ulster • 05:33, May 07

Live most polluted city ranking

Real-time Ulster most polluted city ranking

#CitiesAQI⁺ US
1
The national flag of Ireland

Monaghan

27

2
The national flag of Ireland

Cavan

19

3
The national flag of Ireland

Carndonagh

14

4
The national flag of Ireland

Letterkenny

14

5
The national flag of Ireland

Buncrana

13

Live cleanest city ranking

Real-time Ulster cleanest city ranking

#CitiesAQI⁺ US
1
The national flag of Ireland

Buncrana

13

2
The national flag of Ireland

Carndonagh

14

3
The national flag of Ireland

Letterkenny

14

4
The national flag of Ireland

Cavan

19

5
The national flag of Ireland

Monaghan

27

external link icon

May 7, 2026: Dhaka among top 10 most polluted cities in the world

Car driving across a bridge surrounded by lush mountains and water.
external link icon

6 Clean air tips for your next road trip

Wildfire engulfs a dense forest
external link icon

Wildfire Map Spotlight: Pineland Road Fire, Georgia

Which is the most polluted city in Ulster?