Datasets showing ratified nitrogen dioxide levels (NO2) at various locations around Leeds. The data is broken down into 15 minute averages. Please note The data is not necessarily collected for all dates/times/stations. Data collected within 6 months of today's date will be provisional and not verified as accurate. Data within the last calendar year will be published at hourly intervals and then once verified the 15 minute averages will be published. Further information Annual nitrogen diffusion tube data is also available here: https://datamillnorth.org/dataset/leeds-nitrogen-dioxide-diffusion-tube-network Unratified data on the previously collected dataset is available here: https://datamillnorth.org/dataset/air-quality-nitrogen-dioxide. Please note, this dataset is now archived and will not be updated.