Analysis shows lower air pollution levels since 20mph scheme roll-out – London Borough of Richmond upon Thames

Richmond Council has commissioned an independent assessment to review the levels of air pollution in Richmond upon Thames since the implementation of the 20mph scheme in late 2019 and early 2020. The assessment has now shown that levels have dropped since the lower speed limit was introduced.
The assessment took place in three locations, Queens Road, St Margaret’s Road and Petersham Road, and measured nitrogen dioxide (NO2) levels before the implementation of the scheme and once the scheme had been established.