PM2.5 Open Data Portal

API

Free open data API for low-cost PM2.5 sensor readings

Overview

The PM2.5 Open Data Portal API provides access to real-time and historical PM2.5 data from global low-cost sensors. Key endpoints include geographic-based queries (coordinates/regions), sensor metadata retrieval, and time-series trend analysis. Responses are in JSON format, containing PM2.5 concentration values, temperature, humidity, location details, and timestamps. Ideal use cases include building air quality monitoring apps, academic pollution research, public health dashboards, and personal air quality tracking tools.

Example Integration (JavaScript)

script.js JS


fetch('https://pm25.lass-net.org/#apis')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful API
JSON response format
No authentication required
Real-time & historical data access
Geographic filtering support

Frequently Asked Questions

? Is PM2.5 Open Data Portal free to use?

Yes, the API offers free access to open low-cost PM2.5 sensor data for non-commercial and research applications.

? Does it require an API Key?

No, the API does not require authentication or an API key for basic data retrieval.

? What is the response format?

The API returns data in JSON format, including PM2.5 concentrations, sensor location details, timestamps, and related environmental metrics like temperature and humidity.

Top Alternatives

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Tool Info

Pricing Free

Category Environment

Platform Public API

Pros

⊕ Free to use for research/non-commercial purposes
⊕ No API key needed
⊕ Global low-cost sensor coverage
⊕ Supports both real-time and time-series queries

Cons

⊖ Potential data accuracy variations (low-cost sensor limitations)
⊖ Possible rate limits on requests
⊖ No official service level agreement (SLA)
⊖ Regional coverage gaps in some areas