PM2.5 Open Data Portal
Open low-cost PM2.5 sensor data.
About PM2.5 Open Data Portal
The PM2.5 Open Data Portal provides open APIs and visualization tools for particulate matter air quality data, aggregating sensor readings from multiple networks including EdiMax AirBox, LASS, LASS4U, G0V, ProbeCube, WebDuino, Taiwan EPA, EEVEE, and Rescue-TW. The JSON APIs cover all available sensors (updated every 5 minutes), as well as endpoints for retrieving the latest reading, the last 7 days of data, or data for a specific date from an individual sensor. Data is presented in UTC+0.
Beyond raw data access, the portal offers a Grafana-based sensor dashboard showing aggregated data over the last 24 hours with device search and historical time-range queries, plus geospatial visualizations including a Voronoi diagram, an Inverse Distance Weighting (IDW) interpolation diagram, and the g0v real-time air pollution map. It also publishes IDW animations for Taiwan and specific cities (Taipei, Taoyuan, Taichung, Tainan) updated hourly, along with analysis results such as device rankings, local pollution reports, indoor device data, and device/model status reports generated by IIS-NRL algorithms.
The portal is operated by IIS-NRL at Academia Sinica in connection with the LASS (Location Aware Sensing System) community, and includes a program inviting participants to build and contribute their own PM2.5 sensors to the network. It is intended for developers and researchers working with air quality sensor data in Taiwan, and content is licensed under Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International.
Key features
- JSON APIs for real-time PM2.5 sensor data updated every 5 minutes
- Query latest, last 7 days, or specific-date data for a specific sensor
- Grafana-powered sensor dashboard with 24-hour aggregated data and historical time-range queries
- Geospatial visualizations including Voronoi diagram, IDW interpolation, and g0v real-time air pollution map
- Device ranking and local pollution analysis based on IIS-NRL algorithms
- Device status and Dynamic Calibration Model (DCF) status reports
Frequently asked questions
What kind of data does this API provide?
It provides real-time PM2.5 particulate matter sensor data aggregated from multiple sources including AirBox, LASS, LASS4U, g0v, Taiwan EPA, and others, updated every 5 minutes.
What data formats and time ranges are supported?
Data is available in JSON format for all sensors, and you can query the latest reading, the last 7 days, or a specific date for a specific sensor.
What time zone does the API use?
All API data is in UTC+0.
Who maintains this portal and under what license?
It is maintained by IIS-NRL, Academia Sinica as part of the LASS Community, and is licensed under Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International.
Can I contribute my own sensor data?
Yes, the site invites users to join the Micro-PM2.5 Sensing Project to measure air quality themselves and contribute data.
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