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: 06/12/2021 01:00
N/M 87
Low (2)
N/M N/M 18
Low (2)
Ballymena Antrim Road
Graph
Updated: 06/12/2021 01:00
N/M 84
Low (2)
N/M N/M N/M
Ballymena Ballykeel
Graph
Updated: 05/12/2021 24:00
N/M 48
Low (1)
2
Low (1)
- -
Belfast Centre
Graph
Updated: 06/12/2021 01:00
64
Low (2)
83
Low (2)
9
Low (1)
12
Low (2)
17
Low (2)
Belfast Newtownards Road
Graph
Updated: 05/12/2021 17:00
N/M 77
Low (2)
N/M N/M N/M
Belfast Ormeau Road
Graph
Updated: 05/12/2021 17:00
N/M 73
Low (2)
N/M N/M N/M
Belfast Stockman's Lane
Graph
Updated: 05/12/2021 24:00
N/M 118
Low (2)
N/M N/M 23
Low (2)
Belfast Westlink Roden Street
Graph
Updated: 05/12/2021 17:00
N/M 88
Low (2)
N/M N/M N/M
Castlereagh Dundonald
Graph
Updated: 06/12/2021 01:00
N/M 57
Low (1)
N/M N/M N/M
Derry Dale's Corner
Graph
Updated: 06/12/2021 02:00
N/M 178
Low (3)
N/M N/M N/M
Derry Rosemount
Graph
Updated: 06/12/2021 01:00
73
Low (3)
78
Low (2)
24
Low (1)
13
Low (2)
18
Low (2)
Downpatrick Roadside
Graph
Updated: 05/12/2021 23:00
N/M 122
Low (2)
N/M N/M N/M
Limavady Dungiven
Graph
Updated: 06/12/2021 01:00
N/M 88
Low (2)
N/M N/M N/M
Lisburn Dunmurry Seymour Hill
Graph
Updated: 06/12/2021 01:00
N/M N/M 35
Low (1)
19
Low (2)
25
Low (2)
Lough Navar
Graph
Updated: 06/12/2021 01:00
55
Low (2)
N/M N/M 2
Low (1)
5
Low (1)
Newry Canal Street
Graph
Updated: 05/12/2021 23:00
N/M 136
Low (3)
N/M N/M 18
Low (2)
Newtownabbey Antrim Road
Graph
Updated:
N/M N/M N/M N/M N/M
Newtownstewart
Graph
Updated: 05/12/2021 23:00
N/M N/M N/M N/M 18
Low (2)
North Down Holywood A2
Graph
Updated: 06/12/2021 02:00
N/M 52
Low (1)
N/M 16
Low (2)
24
Low (2)
Strabane Springhill Park
Graph
Updated: 05/12/2021 24:00
N/M N/M 8
Low (1)
N/M 15
Low (1)
Strathfoyle Bawnmore Place
Graph
Updated: 05/12/2021 23:00
N/M N/M N/M N/M 18
Low (2)