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Total Oxidant Concentrations

Overview

The table below provides the 99.8th percentile concentrations of total oxidant (i.e. NOx+O3, as NO2) for all AURN sites where data is available, for the 2017-2019 period.

This data can be used as input data within the Industrial Screening Tool, to determine the maximum NOx emissions (in tonnes per annum) from a stack, for which there should be no risk of exceedance of the NO2 short-term (1-hour mean) air quality objective.

See para 7.38 and Box 7-1 of Technical Guidance LAQM.TG(22) for more information.

Current Version

Total Oxidant Concentrations
Site Name 99.8th Percentile Total Oxidant
Concentration (µg/m³ as NO2)
Data Capture (%)
Aberdeen 141.0 97.3
Aston Hill 144.0 89.4
Barnsley Gawber 138.3 94.3
Belfast Centre 138.4 81.5
Birmingham A4540 Roadside 146.3 92.9
Birmingham Acocks Green 155.0 94.4
Blackpool Marton 144.4 94.0
Bournemouth 157.6 96.8
Brighton Preston Park 147.7 96.4
Bristol St Paul’s 145.4 88.6
Bush Estate 138.8 90.1
Canterbury 162.8 96.5
Cardiff Centre 145.8 76.8
Chilbolton Observatory 161.6 93.3
Coventry Allesley 144.9 97.8
Cwmbran 143.7 98.2
Derry Rosemount 129.5 97.2
Edinburgh St Leonards 131.3 96.3
Eskdalemuir 147.8 90.5
Exeter Roadside 139.2 92.8
Fort William 131.2 97.3
Glasgow Townhead 139.1 98.9
Glazebury 139.0 86.7
High Muffles 156.8 90.1
Hull Freetown 163.5 98.9
Ladybower 142.6 84.8
Leamington Spa 134.2 95.2
Leeds Centre 144.1 98.1
Leicester University 143.1 98.8
Leominster 142.5 88.8
Liverpool Speke 136.3 98.3
London Bloomsbury 152.5 97.6
London Eltham 150.8 96.8
London Haringey Priory Park South 157.0 96.1
London Harlington 156.2 94.4
London Hillingdon 169.9 94.2
London Marylebone Road 228.7 96.7
London N. Kensington 167.6 97.5
Lullington Heath 149.7 96.6
Manchester Piccadilly 136.2 96.5
Manchester Sharston 145.8 98.5
Middlesbrough 141.0 97.4
Narberth 137.0 97.5
Newcastle Centre 142.2 95.1
Northampton Spring Park 159.1 82.8
Norwich Lakenfields 163.1 99.0
Nottingham Centre 148.3 98.2
Peebles 131.4 95.1
Plymouth Centre 147.8 98.1
Port Talbot Margam 141.0 95.4
Portsmouth 142.0 93.6
Preston 142.6 98.1
Reading New Town 168.5 85.4
Rochester Stoke 159.1 83.9
Sheffield Devonshire Green 146.8 91.8
Southampton Centre 162.3 94.7
Southend-on-Sea 162.2 90.7
St Osyth 173.2 96.9

Details

Please note that sites with a lower percentage data capture may lead to a higher degree of uncertainty in the calculated percentile value.

This table is expected to be updated from time to time and therefore is not provided within LAQM.TG(22) to enable these amends to take place.

For further support, or if you require and PDF copy of the table, please contact the LAQM Helpdesk.

LAQM Helpdesk
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