Air Quality - Diffusion Tubes
Tubes measure nitrogen dioxide levels at their location. Used to identify any pockets of air pollution and provide indication of exposure levels.
- Records
- 54
- Formats
- 5
- Last updated
- 7 Jul 2026
Download & API
Air Quality - Diffusion Tubes (CSV)csv
Spreadsheet — attributes, with coordinates for point layers
Air Quality - Diffusion Tubes (GeoJSON)geojson
GeoJSON — for web maps and GIS tools
Air Quality - Diffusion Tubes (GeoParquet)geoparquet
Columnar — query with DuckDB / SQL
Air Quality - Diffusion Tubes (map tiles)pmtiles
Vector tiles — embed in a map
Live ArcGIS layer (source)arcgis
Rendered from PMTiles, queried in-browser from GeoParquet — no server. How this works
Schema
| Field | Type | Values |
|---|---|---|
Site No. SITE_NO | integer | 4 to 106 |
Location LOCATION | string |