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  4. PM2.5 Open Data
published

PM2.5 Open Data

The PM2.5 Open Data API provides developers with free access to real-time air quality monitoring data, ideal for environmental projects and public health initiatives.

Developed by LASS Net

Live API
99.70%Uptime
180msLatency
122Stars
No AuthAuth
NoCredit Card
RESTStyle
1.0.0Version

Reference

API Endpoints

Endpoints

Available routes, request structures, and code examples.

Retrieves PM2.5 air quality measurements

Endpoint URL
https://pm25.lass-net.org/pm2.5
Code Example
curl -X GET 'https://pm25.lass-net.org/pm2.5'
Request Payload
{
  "hours": 24,
  "device": "lass-device-001"
}
Expected Response
{
  "pm2.5": 12.4,
  "device": "lass-device-001",
  "location": [
    25.033,
    121.5654
  ],
  "timestamp": "2023-07-18T12:00:00Z"
}
Version:1.0.0

Integration

Quick Start

cURL ExampleREST
curl -X GET "https://pm25.lass-net.org/API-1.0.0/current"

Docs

Technical Documentation

What this API does

The PM2.5 Open Data API offers developers seamless access to real-time and historical air quality data, specifically focusing on PM2.5 particulate matter concentrations. This API aggregates data from a distributed network of environmental sensors, providing essential pollution metrics necessary for environmental monitoring and public health initiatives.

How it works

The API supports RESTful HTTP requests, and returns data in JSON format to facilitate easy integration into various applications. Developers can retrieve air quality data for specific locations or retrieve global pollution metrics. The API is designed for smooth integration into mobile apps, web dashboards, and research tools.

Authentication

No authentication is required for using the PM2.5 Open Data API. Developers can access the endpoints without API keys or tokens, allowing for immediate integration into projects.

Example usage

  • /api/v1/data - Retrieves real-time air quality data including PM2.5 levels for specified locations.
  • /api/v1/historicaldata - Accesses historical air quality data for trend analysis.

Limits

There are no documented rate limits for the PM2.5 Open Data API, allowing developers to make requests as needed.

Ideal use cases

  • Developing mobile applications focused on air quality awareness.
  • Integrating real-time pollution data into web dashboards.
  • Building research tools for environmental data analysis.
  • Creating solutions for smart city initiatives focused on public health.

Examples

Real-World Applications

  • Integrating air quality data into public health monitoring applications
  • Creating smart city dashboards for environmental data visualization
  • Developing research projects focused on pollution tracking and public health impact
  • Building mobile apps that notify users of current air pollution levels
  • Environmental data reporting for weather or news websites

Evaluation

Advantages & Limitations

Advantages
  • ✓ Free and no authentication required
  • ✓ Real-time and historical PM2.5 data available
  • ✓ Simple RESTful API with JSON responses
  • ✓ Wide regional sensor coverage
  • ✓ Quick integration with minimal setup
Limitations
  • ✗ No official SDKs available
  • ✗ Limited support for other pollutants besides PM2.5
  • ✗ Basic rate limiting information not clearly defined
  • ✗ Latency can vary depending on sensor network load
  • ✗ No advanced features like predictive analytics or AI-powered insights

Support

Frequently Asked Questions

Important Notice

Verify Before You Decide

Last verified · Feb 24, 2026

The details on this page — including pricing, features, and availability — are based on our last review and may not reflect the provider's current offering. Providers update their products frequently, sometimes without prior notice.

What may have changed

Pricing Plans
Features & Limits
Availability
Terms & Policies

Always visit the official provider website to confirm the latest pricing, terms, and feature availability before subscribing or integrating.

Check official site

External Resources

Documentation Official Website Pricing Details Postman Collection

API Specifications

1.0.0
Pricing Model
Free
Credit Card
Not Required
Response Formats
JSON
Supported Languages
6 Languages
SDK Support
REST Only
Rate Limit

No enforced limits

Time to Hello World

Less than 10 minutes - minimal setup required

Free Tier

Full public access with unlimited requests and no authentication required

Best For

Developers building environmental awareness tools, public health apps, and research platforms needing reliable PM2.5 data

Not Ideal For

Applications requiring secured or private air quality data access or advanced analytics

Tags

#air-quality#environment

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