Air Quality Diffusion Tubes

Locations of diffusion tubes for monitoring NO2 levels in York, along with their __latest available bias corrected annual mean__ values. Values currently displayed correspond to __calendar year 2025__. For more air quality related data please visit the following datasets: • [__Air Quality Management Areas (AQMAs) in York__](https://data.yorkopendata.org/dataset/local-air-quality-management-zones) • [__Air Quality Monitoring Stations Locations in York__](https://data.yorkopendata.org/dataset/local-air-quality-monitoring-stations) • [__York Air Quality Monitoring Stations Data__](https://data.yorkopendata.org/dataset/air-quality-monitoring-stations-data) • [__York Diffusion Tubes (NO2) Data__](https://data.yorkopendata.org/dataset/diffusion-tubes-data) *Please note that the data published within this dataset is a live API link to CYC's GIS server. Any changes made to the master copy of the data will be immediately reflected in the resources of this dataset.The date shown in the "Last Updated" field of each GIS resource reflects when the data was first published.