PM2.5 Open Data Portal
Access open data from low-cost PM2.5 air quality sensors.
Read docs Updated 2026-06-17
What is PM2.5 Open Data Portal?
The PM2.5 Open Data Portal is a public repository of air quality readings gathered from low-cost PM2.5 sensors.
It supports researchers, environmental analysts, and developers working on geographic or weather-related air quality projects.
What you can build with PM2.5 Open Data Portal
Build local air quality maps
Plot real-time PM2.5 readings from low-cost sensors on interactive maps to show pollution hotspots in neighborhoods.
Create pollution alert systems
Query sensor data periodically and trigger notifications when PM2.5 levels exceed safe thresholds in user-specified locations.
Support environmental research
Download historical PM2.5 datasets to analyze trends, correlate with weather patterns, or study urban air quality over time.
Get started with PM2.5 Open Data Portal
- 1Visit the PM2.5 Open Data Portal site
- 2Review the listed datasets and endpoint documentation
- 3Make direct HTTPS GET requests to sensor data URLs
- 4Parse the returned JSON or CSV responses
- 5Cache or visualize results in your app
PM2.5 Open Data Portal: pros & cons
Pros
- +No API key or authentication needed
- +HTTPS-only access for secure requests
- +Focus on dense low-cost sensor coverage
- +Free open data for any use
Cons
- –Accuracy limited by low-cost sensor hardware
- –Coverage depends on voluntary sensor placements
- –Only PM2.5 data, no other pollutants
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An open repository providing access to readings from low-cost PM2.5 air quality sensors.
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