Air pollution in Sheffield is up to two-and-a-half times the legal limit, shocking new figures show.
Dangerously high levels of nitrogen dioxide have been recorded around the city as part of a community monitoring scheme.
The concentration of the noxious gas breaches the European Union threshold of 40 micograms per cubic metre at dozens of sites across Ecclesall, Crookes, Darnall, Tinsley and other areas.
Those include primary schools in Nether Edge, where pupils are breathing in a harmful soup of smog on a daily basis.
The most polluted spot is at Sheffield station, where all 14 monitors recorded illegal levels of the toxin.
At the station's taxi rank, over 100 micograms of NO2 per cubic metre was found, and at platform 3A/2B, the level was more than 90μg/m3.
The latest readings, published at the beginning of May, were taken from monitors placed across Sheffield as part of the East End Quality of Life Initiative.
They show average NO2 levels at numerous locations during the first three months of this year.
Air pollution causes an estimated 500 premature deaths in Sheffield each year, according to Sheffield Friends of the Earth.
John Mothersole, chief executive of Sheffield Council, said: "Air quality is a major national problem. We realise this is an issue in Sheffield and are 100 per cent committed to tackling it. Our city is changing rapidly and we must improve air quality for all our residents.
"We have already taken action where necessary. Our recently-published sustainability vision also shows our commitment to improving air quality and creating a sustainable and integrated transport system that supports the city’s growth ambitions.
"We welcome the Government’s announcement and, together with the other cities named in this report, will now study the implications for Sheffield and the wider region."
The council's sustainability plan, approved in March, set out five priorities including reducing air pollution to a point 'well below' the EU limit.
To achieve this, it recommended shifting away from diesel vehicles to those powered by electricity, gas and other more sustainable sources of energy.
SHEFFIELD'S MOST POLLUTED SPOTS (areas where average nitrogen dioxide levels exceed EU limit)
ABBEYDALE ROAD CORRIDOR
Butterworth Cycles, S7 1TA
Abbeydale Road/Carterknowle Road
Abbeydale Road, S7 2BH
Chippendale, Abbeydale Road/Archer Road S7 2BJ
La Scala, Abbeydale Road
Abbeydale Road South/Abbey Lane
CROOKES AND BROOMHILL
Crookes Road (opp Hoole Road) S10 5BB
Newbould Lane/Watson Road
Manchester Road/Fulwood Road junction
Shop Front Parkway R/A S9 4AE
ECCLESALL (January and February only)
Books on the Park S11 8TG
Ecclesall Fisheries (over 50)
Walkley Road/South Road (March only) (over 50)
Nether Edge School
Holt House School
Penistone Road/Bickerton Road
Catchbar Lane traffic light
Penistone Road/Dixon Lane
SHEFFIELD HALLAM UNIVERSITY
Sheaf Street 2
Sheaf Street station side
Station taxi rank 1
Station taxi rank 2
14 monitors all exceed legal cap
Siemens Close (M1 end)
Old Tinsley Infants School