24 Hour Summary

The maximum pollutant concentrations measured during the last 24 hours across Northern Ireland are shown below. Summary graphs showing the last seven days are available for each pollutant in the left hand column of the table.

» Switch to the current levels summary

Key: n/m : not measured

Monitoring site 8 Hour mean
Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Armagh Lonsdale Road
Graph
Updated: 03/12/2023 19:00
N/M 40
Low (1)
N/M N/M 25
Low (2)
Ballymena Antrim Road
Graph
Updated: 03/12/2023 19:00
N/M 47
Low (1)
N/M N/M N/M
Ballymena Ballykeel
Graph
Updated: 03/12/2023 18:00
N/M 37
Low (1)
2
Low (1)
20
Low (2)
22
Low (2)
Belfast Centre
Graph
Updated: 03/12/2023 19:00
23
Low (1)
52
Low (1)
6
Low (1)
23
Low (2)
26
Low (2)
Belfast Newtownards Road
Graph
Updated: 03/12/2023 19:00
N/M 57
Low (1)
N/M N/M N/M
Belfast Ormeau Road
Graph
Updated: 03/12/2023 19:00
N/M 57
Low (1)
N/M N/M N/M
Belfast Stockman's Lane
Graph
Updated: 03/12/2023 19:00
N/M 70
Low (2)
N/M N/M 31
Low (2)
Belfast Westlink Roden Street
Graph
Updated: 03/12/2023 19:00
N/M 88
Low (2)
N/M N/M N/M
Castlereagh Dundonald
Graph
Updated: 03/12/2023 15:00
N/M 59
Low (1)
N/M N/M N/M
Derry Dale's Corner
Graph
Updated: 03/12/2023 19:00
N/M 120
Low (2)
N/M N/M N/M
Derry Rosemount
Graph
Updated: 03/12/2023 19:00
31
Low (1)
43
Low (1)
38
Low (1)
27
Low (3)
27
Low (2)
Downpatrick Roadside
Graph
Updated: 03/12/2023 15:00
N/M 94
Low (2)
N/M N/M N/M
Limavady Dungiven
Graph
Updated: 03/12/2023 19:00
N/M 92
Low (2)
N/M N/M N/M
Lisburn Dunmurry Seymour Hill
Graph
Updated: 03/12/2023 16:00
N/M N/M 3
Low (1)
26
Low (3)
29
Low (2)
Lough Navar
Graph
Updated: 03/12/2023 19:00
50
Low (2)
N/M N/M 7
Low (1)
8
Low (1)
Newry Canal Street
Graph
Updated: 03/12/2023 19:00
N/M 101
Low (2)
N/M N/M 33
Low (2)
Newtownabbey Antrim Road
Graph
Updated: 03/12/2023 19:00
N/M 86
Low (2)
N/M N/M N/M
Newtownstewart
Graph
Updated: 03/12/2023 19:00
N/M N/M N/M 25
Low (3)
28
Low (2)
North Down Holywood A2
Graph
Updated: 03/12/2023 19:00
N/M 71
Low (2)
N/M 20
Low (2)
24
Low (2)
Strabane Springhill Park
Graph
Updated: 03/12/2023 19:00
N/M N/M 48
Low (1)
N/A N/A
Strathfoyle Bawnmore Place
Graph
Updated: 03/12/2023 19:00
N/M N/M N/M 17
Low (2)
19
Low (2)