Safecast is a global volunter-centered citizen science project working to empower people with data about their environments. We believe that having more freely available open data is better for everyone. Everything we do is aimed at putting data and data collection know-how in the hands of people worldwide.


Safecast maintains the largest open dataset of background radiation measurements ever collected. Over 35 million readings to date and growing daily.


Safecast is currently building out a network of sensors to monitor PM1.0, PM2.5, Carbon Monoxide, Nitrogen Dioxide, Ozone and Methane.


All data collected by Safecast is released under a CC0 public domain designation. Anyone is free to use it for free with no licensing restrictions.

Innovative • Credible • Transparent

Safecast is pro-data

Radiation and its environmental and health effects are issues which are fraught with deep-seated controversy. Unfortunately, it has been difficult until now to find radiation data which truly has been free of bias, or of the perception of bias in favor of one ideological position or another. From the outset, Safecast has not sided with either the pro- or anti-nuclear camps, and has striven to demonstrate the advantages to science and to the public of having an independent organization devoted solely to providing the most accurate and credible data possible. Safecast is “pro-data.” Independence, transparency, and openness are essential for us and the key to our credibility. Safecast was quickly recognized in Japan and abroad as a reliable and unbiased source of environmental information which citizens can use when making decisions. With an ever expanding global reach, Safecast tries to set an example for citizen scientists everywhere to emulate.

35 million data points
Safecast Map
“What Safecast proves is that all the preparation in the world – all the money in the world – still fails if you don’t have a rapid, agile, resilient system.”Joi Ito

the vanguard of Citizen science

New technologies and social media have provided citizen scientists everywhere with effective new tools for participation and empowerment. The Safecast community is on the vanguard of these developments worldwide, providing access to objective, independent information of high quality which has been generated by citizens themselves. The rise of citizen science is one of the few bright spots that have emerged following the Fukushima disaster. The citizen science genie is out of the bottle, and cannot be forced back in.

safecast is people

Safecast is a inclusive, international community. Our members come from a very wide cross-section of society worldwide, including experts and working professionals, students, retirees and hobbyists, teachers and academics, filmmakers, writers, designers, community organizers, homemakers, athletes – people of all ages and from every walk of life. Our systems are easy to use, and and there are many ways to participate. Why not get in touch?

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