Safecast is an international volunteer driven non-profit organization

whose goal is to create useful, accessible, and granular environmental data. All Safecast data is published, free of charge, into the public domain under a CC0 designation.

After the devastating earthquake and tsunami which struck eastern Japan on March 11, 2011, and the subsequent meltdown of the Fukushima Daiichi Nuclear Power Plant, accurate and trustworthy radiation information was publicly unavailable. Safecast was formed in response, and quickly began monitoring, collecting, and openly sharing information on environmental radiation – growing quickly in size, scope, and geographical reach. Before long we began monitoring Air Quality as well. Our mission is to provide citizens worldwide with the tools they need to inform themselves by gathering and sharing accurate environmental data in an open and participatory fashion.

Safecast has deployed an innovative model of rapid integrated development, including hardware design, software design, engineering and science, visual design and communication, and social design factors. From the start we have embraced open-source and open-data methodologies, along with new fabrication technologies, such as 3D printing, laser-cutters, and on-demand fabrication of components. We promote rapid, agile, and iterative development, and benefit from having a technically skilled pool of collaborators around the globe.

The value and credibility of Safecast data has been globally recognized. Our community is inclusive and non-partisan, comprising people of all ages and from all walks of life. Energetic outreach activities allow us to share our experiences with individuals and groups worldwide through frequent workshops, talks, and educational programs.

But most importantly, Safecast has enabled people to easily monitor their own homes and environments, and to free themselves of dependence on government and other institutions for this kind of essential information. We are happy to be playing a major continuing role in the emergence of technically competent citizen science efforts worldwide.


Safecast is apolitical

We take no position either for or against nuclear power. Our community is inclusive and non-partisan, bringing together people of all ages and from all walks of life. Outreach activities allow us to share our experiences with individuals and groups worldwide through frequent workshops, talks, and educational programs.

Safecast is pro-data

We're committed to giving people accurate information they can use to help make their own informed decisions. Safecast is funded by individuals, grants, and charitable foundations, however financial contributors and donors have no input on Safecast methods or mission.

Safecast is voluntary

Data is collected primarily by volunteers using Safecast designed hardware. We do not assign areas to be measured, rather each data volunteer is free to measure areas they consider worthwhile. Measurements are taken free of charge. Several layers of quality control are in place and best practices are followed, but no warranties or guarantees are provided.

At Safecast, we're proud that much of our work overlaps with the United Nations Sustainable Development Goals. The following goals are directly related to our efforts. Click on any icon for more details.

The Safecast Team

In response to Japan’s tsunami and nuclear disaster of March 2011 a group of individuals came together in an effort to address a critical public need for open, accurate, and unbiased environmental data. Setting out to collect and publish useful data relating to the levels of nuclear radiation in and around the area of the disaster in Japan, Safecast was born.

Today our growing Safecast team continues collect and publish environmental data from all over the world.

Pieter Franken

Japan Director, Co-Founder


Pieter Franken's career has primarily been in Fintech where he is known for pioneering innovative services by embracing bleeding edge technologies while minimizing time-to-market and dramatically reducing costs.

Joi Ito



Joi Ito is an activist, entrepreneur and scholar focusing on the ethics and governance of technology, tackling complex problems such as climate change, and redesigning the systems that support scholarship and science.

Sean Bonner

Global Director, Co-Founder


Sean Bonner is an entrepreneur, publisher, activist, artist and enthusiast. He is an Associate Professor at Keio University in Tokyo and sits on the board of CicLAvia. Since 2014 has been a Fellow with the Shuttleworth Foundation.

Angela Eaton

Americas Director

San Francisco

Angela Eaton is a contributing author to Columbia University’s Graduate School of Architecture Planning and Preservation’s publication Innovations in Urban Water Infrastructure and has served as a SXSW Eco Advisory Board member. She participated as a member of the Civil Society Working Group during the United Nations Habitat III process and remains involved with the UN-Habitat’s international non profits and women’s organizations. Angela was awarded mayoral recognition by the City and County of San Francisco for her use of technology to assist the City in meeting its green house gas reduction goals.

Ray Ozzie

Board Member, Sensor Design


Ray has long been a pioneer in the areas of communications and social productivity. Through late 2010 he served as chief software architect of Microsoft, the company’s most senior technical leadership role that he assumed following its acquisition of Groove Networks - a company he founded in 1997 to develop software for secure peer-to-peer business team collaboration. Ozzie currently serves as a director of Hewlett Packard Enterprise, Safecast, and Balena.

Eito Katagiri

API Support


Jun Murai

Advisor, Keio SFC


Yuka Hayashi

Design Thinking / Kittychan


Norio Watanabe

Education & Workshops


Toshikatsu Watanabe

Outreach & Advocacy


Helen Turvey



Hugh Choi

Korea Outreach


Joe Moross



Nick Dolezal

Maps & Apps


Andrew Norcross

Word Pressing


Kiki Tanaka



Beth Noveck

Advisor, NYU GovLab

New York

Tara Brown

Education & Outreach


Karien Bezuidenhout


Cape Town

Andrew Todd

API Support


Zachary Chang



Mat Schaffer

API Master


Robin Scheibler

Embedded Software


Jun Yamadera

Outreach & Technical Support

Aizu Wakamatsu

Chiaki Hayashi



Rob Oudendijk

Servers & Device Prototyping


Kiyoshi Kurokawa



Jory Felice

Los Angeles Coordinator

Los Angeles

Edouard Lafargue

Android App Development

Palo Alto

Azby Brown

Lead Researcher


For a more detailed history of Safecast's early days, please read this.

(Safecast is a registered trademark and can not be used without permission.)