Sheffield air pollution

I’ve mapped the air pollution in Sheffield. All locations with measures over 40 are illegal (though being below this doesn’t mean that it is safe – lower is always better).

Sheffield NO2 pollution 2018

Previous years

Sheffield NO2 pollution 2017

The data

The data is from small monitoring tubes which are collected each month for lab analysis. Many are done by volunteers – I do a few near where I live. The readings are calibrated against permanent air monitoring stations in Sheffield by the council who coordinate these tubes.