Request ID: FOI-2905-2122 Date published: 04 April 2022
You asked
I would like to see the official emissions data taken before and after the ulez expansion.
We answered
TfL Ref: EIR-2905-2122
Thank you for your request received by Transport for London (TfL) on 15th March 2022 asking for information about the ULEZ expansion.
Your request has been considered in accordance with the requirements of the Environmental Information Regulations and our information access policy.
Specifically you asked:
“I would like to see the official emissions data taken before and after the ulez expansion.”
From the wording of your request it is not clear what exact locations and timeframe your request relates to. However, note that TfL itself does not record emissions data. Real-time and historic air quality data across London is publicly available on the London Air Quality Network (LAQN - see here: https://www.londonair.org.uk/ ), which includes more than 100 monitoring sites. An additional 30 sites located across London - but not part of the LAQN - are also available on the Air Quality England website (see here https://www.airqualityengland.co.uk ). Both sites provide detailed hourly data for all monitoring sites, as well as yearly aggregated statistics.
You may also be interested in the following more general documents published on the TfL / GLA websites:
