London's air is among the most polluted in the UK, but it isn't uniform — a flat on the Euston Road breathes very differently from a house in leafy Haringey. Pick your borough for a local air-quality snapshot and a purifier recommendation sized to the housing stock.
Islington
Moderate (AQI ~68)
Local guide →Lewisham
Moderate (AQI ~60)
Local guide →Southwark
Moderate (AQI ~66)
Local guide →Haringey
Moderate (AQI ~58)
Local guide →Ready to clean up your London air?
Luggable MERV-13 kits deliver up to 681 m³/h CADR — built on the Corsi-Rosenthal principle, from £229. Ships from Oxford in 2–3 days.
Shop the UK store → See all kitsHow London air pollution gets indoors
Up to half of the fine particles indoors can originate outside — pulled in through trickle vents, gaps and open windows. On still, sunny days pollution pools at street level, so opening a window near a main road can make indoor air worse. A purifier running on a low overnight setting keeps a steady floor of clean air regardless of what's happening outside.
Frequently asked questions
Where can I check my London air quality for free?
The London Air Quality Network (LAQN), run by Imperial College London, publishes live readings from monitors across every borough. DEFRA's UK-AIR site gives the national daily index.
Which London boroughs have the worst air?
Central boroughs along major roads — Camden (Euston Road), Tower Hamlets and Westminster — record the highest NO2. Outer boroughs are cleaner but still exceed WHO PM2.5 guidelines.