PM2.5 Open Data Portal
Open low-cost PM2.5 sensor data
- Authentication
- No auth
- HTTPS
- Yes
- CORS
- Unknown
- Category
- Environment
- Documentation / URL
- https://pm25.lass-net.org/#apis
Overview
The LASS PM2.5 Open Data Portal provides low-cost air-quality sensor data (Taiwan) — keyless.
⚠️ Status (verified 2026-08): a guessed path returned HTTP 404 (HTML) — the route paths differ. Check the portal docs for valid routes.
What it provides
curl "https://pm25.lass-net.org/data/last-all.json"Notes
- PM2.5 sensor readings (LASS network).
- Route paths per the portal docs.
FAQ
Is the PM2.5 portal free? Yes — free and keyless.
Why 404? Our 2026-08 guess path was wrong (verified) — check the portal docs.
What data is available? PM2.5 sensor readings.
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