Safecast Map is described as 'Safecast is an international volunteer driven non-profit organization whose goal is to create useful, accessible, and granular environmental data including ionizing radiation. All Safecast data is published, free of charge, into the public domain under a CC0 designation' and is a Map service in the online services category. There are 2 alternatives to Safecast Map, not only websites but also apps for. The best Safecast Map alternative is Geiger Counter World Map, which is both free and Open Source.
It is developed by GQ Electronics. Its devices (e.g., geiger counters) are fully compatible with the website and it is very easy to track and upload data of the levels of (ionizing) radiation, including radon.
United States
A free worldwide radiation monitoring website. It is a place for experimenters, enthusiats and background radiation monitoring.
