About air quality in Kensington and Chelsea
Kensington and Chelsea is one of the most densely-populated local authorities in the UK and runs along the north bank of the Thames from Chelsea up through South Kensington, Notting Hill, and North Kensington. The principal NO₂ pressure tracks the A3220 / West Cross Route, the A4 / Cromwell Road, the A40 / Westway corridor in the north of the borough, and Earls Court Road and King’s Road in the south. Background levels have improved since the ULEZ extension in 2023.
PM₂.₅ across the borough is driven by regional weather and transport rather than local sources; on most days K&C shares air with Westminster and Hammersmith and Fulham. Coverage is dense along the major arterials and reasonable in the residential interior — K&C has more active reference background sites than most Inner London boroughs, so the verdict here is among the more robust of the borough pages.
Last reviewed: 2026-05-18