FOI request detail

CO2 levels in Blackwall tunnel

Request ID: FOI-3974-2324
Date published: 21 February 2024

You asked

What are the typical daily and peak CO2 (carbon dioxide) ppm levels in Blackwall tunnel? Is this monitored? Previous requests included carbon monoxide and NOx but not carbon dioxide.

We answered

Our ref: FOI-3974-2324/GH
Thank you for your request received by Transport for London (TfL) on 2 February 2024 asking for information about CO2 levels in Blackwall tunnel.
Your request has been considered under the requirements of the Environmental Information Regulations and our information access policy.
Unfortunately we do not hold the information you require. TfL does not monitor CO2 (carbon dioxide) ppm levels at Blackwall southbound or northbound tunnels.
If you are not satisfied with this response please see the attached information sheet for details of your right to appeal.
Yours sincerely
Graham Hurt
FOI Case Officer
FOI Case Management Team
General Counsel
Transport for London

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