I ran across these two maps that track radioactivity in the local environment. I didn’t realize that the United States has so many detection devices along major highways. Take 1-95 in Northern Virginia. Around 2006 the DHS and the EPA started placing these detectors along major routes, and you drive under them all day long and you likely had no clue what they are. After the earthquake and tsunami in Japan in 2011, which caused the Fukushima radiation spill. Several non-profit organizations started to rapidly deploy sensors. In 2015, the EPA started to disable their sensors as they were not working and the non-profit organizations were not only deploying more of them faster than the EPA could, but their sensors were more functional than the EPAs.
The two websites are:
Joint Research Centre – Radioactivity Environmental Monitoring
The map on their website shows measurements of environmental radioactivity in the form of gamma dose rate averages and maxima for the last 24 hours. The measurements originate from approximately 5500 stations.
Safecast is an international volunteer drive non-profit organization. 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. Safecast has an app for iOS only.