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: 21/04/2021 09:00
N/M 58
Low (1)
N/M N/M 29
Low (2)
Ballymena Antrim Road
Graph
Updated: 21/04/2021 09:00
N/M 51
Low (1)
N/M N/M N/M
Ballymena Ballykeel
Graph
Updated: 21/04/2021 09:00
N/M 37
Low (1)
5
Low (1)
N/M 17
Low (2)
Belfast Centre
Graph
Updated: 21/04/2021 09:00
61
Low (2)
58
Low (1)
10
Low (1)
15
Low (2)
23
Low (2)
Belfast Newtownards Road
Graph
Updated: 21/04/2021 06:00
N/M 64
Low (1)
N/M N/M N/M
Belfast Ormeau Road
Graph
Updated: 21/04/2021 06:00
N/M 62
Low (1)
N/M N/M N/M
Belfast Stockman's Lane
Graph
Updated: 21/04/2021 09:00
N/M 96
Low (2)
N/M N/M 32
Low (2)
Belfast Westlink Roden Street
Graph
Updated: 21/04/2021 06:00
N/M 107
Low (2)
N/M N/M N/M
Castlereagh Dundonald
Graph
Updated: 21/04/2021 09:00
N/M 44
Low (1)
N/M N/M N/M
Derry Dale's Corner
Graph
Updated: 21/04/2021 10:00
N/M 103
Low (2)
N/M N/M N/M
Derry Rosemount
Graph
Updated: 21/04/2021 09:00
81
Low (3)
45
Low (1)
22
Low (1)
10
Low (1)
20
Low (2)
Downpatrick Roadside
Graph
Updated: 21/04/2021 08:00
N/M 136
Low (3)
N/M N/M N/M
Limavady Dungiven
Graph
Updated: 21/04/2021 09:00
N/M 73
Low (2)
N/M N/M N/M
Lisburn Dunmurry Seymour Hill
Graph
Updated: 21/04/2021 08:00
N/M N/M - N/M 23
Low (2)
Lough Navar
Graph
Updated: 21/04/2021 09:00
85
Low (3)
N/M N/M 7
Low (1)
10
Low (1)
Newry Canal Street
Graph
Updated: 21/04/2021 08:00
N/M 115
Low (2)
N/M N/M 29
Low (2)
Newtownabbey Antrim Road
Graph
Updated: 21/04/2021 09:00
N/M 73
Low (2)
N/M N/M N/M
North Down Holywood A2
Graph
Updated: 21/04/2021 09:00
N/M 44
Low (1)
N/M 11
Low (1)
18
Low (2)
Strabane Springhill Park
Graph
Updated: 21/04/2021 09:00
N/M N/M 19
Low (1)
N/M 15
Low (1)
Strathfoyle Bawnmore Place
Graph
Updated: 21/04/2021 10:00
N/M N/M N/M N/M 22
Low (2)