Privacy · HazardWatch
Last updated 4 October 2026
In short
- We do not collect your name, email, phone number or your coordinates.
- Your GPS position is used on your device only and never leaves it.
- If you turn on alerts we keep only the district you want alerts for, so we can send you hazards for that area.
What we store when you turn on alerts
- The push address (endpoint) and encryption keys your browser creates, used only to deliver messages to this device.
- District and subdistrict codes (e.g. TH1028) — not coordinates.
- Your language, the alert topics you chose (e.g. flooding, PM2.5) and your PM2.5 alert level.
- A record of which alerts were sent, so they are not repeated (deleted automatically within hours).
What stays on your device
- Language (cookie), theme, colour mode and alert settings (local storage) — not sent to us, except alert settings when you turn alerts on.
Who handles the data
- The service runs on Cloudflare (stores alert subscriptions).
- Notifications are delivered through browser vendors’ push services, e.g. Google, Apple, Mozilla, Microsoft.
- We do not sell or share data for advertising and use no trackers.
Retention and deletion
- Kept until you turn alerts off or your browser cancels the subscription (we delete it automatically when delivery fails).
- Tap "Turn off alerts" on the main page to delete your data immediately.
Contact
- [Contact — to be decided]