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 to collect and publish environmental data from all over the world.

Chiaki Hayashi

Board of Directors


Chiaki Hayashi is the Co-Founder of Loftwork, a new style of creative company that boasts a network of over 30,000 creators. Hayashi pioneered the adoption of Project Management Body of Knowledge (PMBOK) guidelines in the creative industries in Japan, and has penned the book Web Project Management Standards. Hayashi is a member of the Good Design Awards Screening Committee, and a chairman of Hidakuma that aims to up-cycle the resources into a form of regional value through the utilization of digital fabrication and technology.

Helen Turvey

Board of Directors


Helen has spent the past 2 decades working to make philanthropy better. She is honored to have spent over half of that as CEO of the Shuttleworth Foundation. She is also on the board of several organizations that drive open ideals, including the Mozilla Foundation and the Open Knowledge Foundation.

Joi Ito

Board of Directors, Co-Founder


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.

Andrea Polidori, Ph.D.

Board of Directors

Los Angeles

Dr. Andrea Polidori is the Advanced Monitoring Technologies Manager at the South Coast AQMD in the Science and Technology Advancement Division. His primary responsibilities include the overall management of all South Coast AQMD special monitoring programs and related projects. He has been leading the design, development and implementation of the Air Quality Sensor Performance Evaluation Center (AQ-SPEC), a program created to conduct comprehensive performance tests of commercially available low-cost air quality sensors.

Mark Frauenfelder

Board of Directors

Los Angeles

Mark Frauenfelder is a research director at Institute for the Future, and is the founder of the technology and culture website Boing Boing. He was the founding editor-in-chief of Make magazine and He designed Billy Idol’s CD covers and has written for The New York Times Magazine, The Atlantic, Popular Science, Business Week, The Hollywood Reporter, Wired, and other national publications.

Sean Bonner

Global Director, Co-Founder


Sean Bonner is an entrepreneur, publisher, activist, artist and enthusiast with deep focus on community independence and distributed (crowd sourced) actions. He is an Associate Professor at Keio University in Tokyo and a Shuttleworth Foundation Fellow.

Ray Ozzie

Board of Directors, 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, and serves as CEO of Blues Wireless.

Beth Noveck

Board of Directors

New York

Beth Simone Noveck directs the Governance Lab (GovLab) and its MacArthur Research Network on Opening Governance. She is a Professor in Technology, Culture, and Societyand affiliated faculty at the Center for Urban Science and Progress at New York University’s Tandon School of Engineering and a Fellow at NYU’s Institute for Public Knowledge.

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. She received mayoral recognition by San Francisco for her use of technology to assist the City in meeting its green house gas reduction goals.

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.

Douglas Rushkoff

Board of Directors

New York

Douglas Rushkoff is the host of the Team Human podcast and author of Team Human as well as a dozen other bestselling books on media, technology, and culture. He is Professor of Media Theory and Digital Economics at CUNY/Queens. He's written graphic novels and made television documentaries. He lives in New York, and lectures about media, society, and economics around the world.

Karien Bezuidenhout


Cape Town

Zachary Chang



Azby Brown

Lead Researcher


Robin Scheibler

Embedded Software


Andrew Todd

API Support


Andrew Norcross

Word Pressing


Hugh Choi

Korea Outreach


Jun Yamadera

Outreach & Technical Support

Aizu Wakamatsu

Yuka Hayashi

Design Thinking / Kittychan


Norio Watanabe

Education & Workshops


Mat Schaffer

API Master


Toshikatsu Watanabe

Outreach & Advocacy


Jun Murai

Advisor, Keio SFC


Edouard Lafargue

Android App Development

Palo Alto

Kiki Tanaka



Joe Moross



Rob Oudendijk

Servers & Device Prototyping


Cesar Harada

Safecast Asia

Hong Kong

Eito Katagiri

API Support


Tara Brown

Education & Outreach


Jory Felice

Los Angeles Coordinator

Los Angeles

Kiyoshi Kurokawa



Nick Dolezal

Maps & Apps


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.)