City of London Corporation Monitoring Data

Use the tabs below to explore information about the current and historic air pollution levels in this local authority. You can select another local authority using the dropdown menu. 
Fullscreen Map Centre map on LA

Use the map above to explore the monitoring sites in for this local authority and the surrounding area. The table below shows a summary of sites within this local authority - you can click on the site names to get more detailed information.

Active local authority funded monitoring sites

Monitoring Site Ozone
(O3)
Nitrogen Dioxide
(NO2)
Sulphur Dioxide
(SO2)
Particulate Matter
(PM2.5)
Particulate Matter
(PM10)
Highest Pollution Band Last Updated
Beech Street NOx n/m55 (1 Low)n/mn/mn/m Low
(Index 1)
21/11/2024
09:00
Beech Street PM n/mn/mn/mn/m14 (1 Low) Low
(Index 1)
21/11/2024
09:00
Bell Wharf Lane n/m72 (2 Low)n/mn/m20 (2 Low) Low
(Index 2)
21/11/2024
09:00
Farringdon Street n/mn/an/mn/an/m No Data 18/11/2024
24:00
Guildhall 17 (1 Low)n/mn/mn/mn/m Low
(Index 1)
21/11/2024
10:00
The Aldgate School n/m64 (1 Low)n/m8 (1 Low)11 (1 Low) Low
(Index 1)
21/11/2024
09:00

» Visit the Defra UK-AIR website for details of Defra funded AURN monitoring sites

Closed local authority funded monitoring sites

The following monitoring sites are no longer active in this local authority, but you can still access information about them by clicking on their names below.

Monitoring Site Date Ended
Senator House [Closed] (CT1) 15/01/2013
Upper Thames Street [Closed] (CT8) 13/09/2021
Walbrook Wharf [Closed] (CT6) 08/01/2023
Overall Pollution Summary:
LOW ( Index 2)
Very High 10
High 9
  8
  7
Moderate 6
  5
  4
Low 3
  2
  1

Guide to map markers: Markers legend: square markers show LA sites, round markers show AURN

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