OpenAQ
Access global air quality measurements from open data sources.
Read docs Updated 2026-06-17
What is OpenAQ?
OpenAQ is a platform that collects and distributes air quality data from multiple public sources around the world.
It is useful for researchers, developers, and organizations building applications related to environmental monitoring and public health.
What you can build with OpenAQ
City Air Quality Dashboards
Developers build interactive maps and dashboards showing current PM2.5, NO2, and ozone levels pulled from OpenAQ for specific cities or regions.
Health Alert Applications
Mobile and web apps integrate OpenAQ data to send push notifications when pollution exceeds safe thresholds in a user's location.
Environmental Trend Analysis
Researchers query historical measurements to analyze long-term pollution patterns and generate reports or visualizations.
Get started with OpenAQ
- 1Sign up on the OpenAQ website and obtain an API key
- 2Read the API documentation to identify available endpoints
- 3Include the API key in request headers for authentication
- 4Make HTTPS requests to fetch real-time or historical measurements
- 5Parse the JSON response and integrate data into your application
OpenAQ: pros & cons
Pros
- +Worldwide coverage from government and public sources
- +Access to both real-time and historical pollution data
- +Secure HTTPS connections supported
- +Free access after obtaining an API key
Cons
- –Requires an API key for all requests
- –Data coverage depends on participating government agencies
- –Rate limits and exact usage quotas not detailed in description
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Frequently asked questions
OpenAQ aggregates air quality data from government agencies and other public sources worldwide, offering real-time and historical pollution measurements via API.
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