The most polluted location in the UK is London's Marylebone, according to new analysis.
Confused.com compiled data from the Department for Environment, Food and Rural Affairs looking at the levels of nitrogen dioxide (NOx) per cubic metre.
London's Marylebone reported the highest level, followed by Crumlin, a small town in Wales. Both locations reported levels of NOx which were more than double the EU legal maximum, according to the analysis.
|Top 10 UK air pollution hotspots|
In the capital, mayor Sadiq Khan has said tackling air pollution troubles is one of his priorities. Last March, the first of London's low emission bus zones was launched in Putney High Street, and that was then followed by Brixton in December. There are 12 in total planned by 2020.
Putney High Street exceeded hourly legal levels of nitrogen dioxide on 1,248 occasions in 2016. Under EU rules, the limit shouldn’t be exceeded more than 18 times in a year.
The clean bus zones will be serviced by cleaner buses in a drive to slash nitrogen oxide emissions.
But the London air pollution problem is a big one. At the end of January, King's College London said the capital had officially reached its legal air pollution limit for the entire year. Khan said that marker meant London's air quality had stuck within legal limits for the longest period in nearly two decades.
Other measures include the introduction of the £10 T-charge, meaning vehicles in the area will need to meet minimum exhaust emission standards or drivers have to pay a daily £10 charge on top of the congestion charge.
An ultra-low emission zone is meant to come into force in April next year too where all cars, motorcycles, vans, minibuses, buses, coaches, and lorries, will need to meet exhaust emission standards or pay a daily charge to travel.