Scottish Cities

Nitrogen Dioxide levels at monitoring sites in selected Scottish cities, 2019

aq no2 COMP 2020Click on graph to expand

Five monitoring sites in Scotland's four largest cities breached the ´╗┐NO2 annual mean Air Quality Strategy (AQS) objective of 40μg/m3 in 2019.  One of these sites was in Glasgow (Kerbside) which recorded the largest breach of the AQS annual mean objective.

The Glasgow Kerbside site has recorded annual mean nitrogen dioxide concentrations exceeding the AQS objective of 40μg/m3 since the site began recording 1998 - see trends section.


Only measurements from monitoring sites with a data capture rate of greater than 75% are shown in the graphs above.  

Only monitoring stations classified as kerbside, roadside, urban centre and urban background are included.

The main effect of breathing in raised levels of NO2 (nitrogen dioxide) is the increased likelihood of respiratory problems. Nitrogen dioxide inflames the lining of the lungs, and it can reduce immunity to lung infections. This can cause problems such as wheezing, coughing, colds, flu and bronchitis.

The Air Quality in Scotland site provides up-to-date estimates of air quality from monitoring sites across Scotland.

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