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: 30/07/2021 05:00
N/M 38
Low (1)
N/M N/M 13
Low (1)
Ballymena Antrim Road
Graph
Updated: 30/07/2021 05:00
N/M 24
Low (1)
N/M N/M N/M
Ballymena Ballykeel
Graph
Updated: 30/07/2021 04:00
N/M 20
Low (1)
6
Low (1)
3
Low (1)
6
Low (1)
Belfast Centre
Graph
Updated: 30/07/2021 05:00
50
Low (2)
23
Low (1)
2
Low (1)
4
Low (1)
7
Low (1)
Belfast Newtownards Road
Graph
Updated: 30/07/2021 04:00
N/M 37
Low (1)
N/M N/M N/M
Belfast Ormeau Road
Graph
Updated: 30/07/2021 04:00
N/M 19
Low (1)
N/M N/M N/M
Belfast Stockman's Lane
Graph
Updated: 30/07/2021 05:00
N/M 81
Low (2)
N/M N/M 14
Low (1)
Belfast Westlink Roden Street
Graph
Updated: 30/07/2021 04:00
N/M 47
Low (1)
N/M N/M N/M
Castlereagh Dundonald
Graph
Updated: 30/07/2021 05:00
N/M 31
Low (1)
N/M N/M N/M
Derry Dale's Corner
Graph
Updated:
N/M N/M N/M N/M N/M
Derry Rosemount
Graph
Updated: 30/07/2021 05:00
56
Low (2)
6
Low (1)
2
Low (1)
9
Low (1)
15
Low (1)
Downpatrick Roadside
Graph
Updated: 30/07/2021 05:00
N/M 42
Low (1)
N/M N/M N/M
Limavady Dungiven
Graph
Updated: 30/07/2021 06:00
N/M 50
Low (1)
N/M N/M N/M
Lisburn Dunmurry Seymour Hill
Graph
Updated: 30/07/2021 05:00
N/M N/M 5
Low (1)
4
Low (1)
-
Lough Navar
Graph
Updated: 30/07/2021 05:00
54
Low (2)
N/M N/M 2
Low (1)
5
Low (1)
Newry Canal Street
Graph
Updated: 30/07/2021 03:00
N/M 57
Low (1)
N/M N/M 11
Low (1)
Newtownabbey Antrim Road
Graph
Updated: 30/07/2021 03:00
N/M 31
Low (1)
N/M N/M N/M
Newtownstewart
Graph
Updated: 30/07/2021 06:00
N/M N/M N/M N/M 11
Low (1)
North Down Holywood A2
Graph
Updated: 30/07/2021 01:00
N/M 63
Low (1)
N/M 3
Low (1)
7
Low (1)
Strabane Springhill Park
Graph
Updated: 30/07/2021 04:00
N/M N/M 8
Low (1)
N/M 11
Low (1)
Strathfoyle Bawnmore Place
Graph
Updated: 30/07/2021 05:00
N/M N/M N/M N/M 9
Low (1)