You will find links below to other federal, state and international government environmental radiation monitoring networks. The data provided on these websites is not validated or verified by EPA. 

The following links exit the site Exit

Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) Exit
CTBTO has a network of radionuclide monitoring stations across the world that detect radionuclide particles and noble gases like xenon.

Canadian Monitoring System
Canada's Fixed Point Surveillance (FPS) network monitors public doses from radioactive materials in air.

SURFRAD Network (National Ocean and Atmospheric Administration - NOAA)
The SURFRAD Network monitors surface radiation at eight locations in the continental United States.

Idaho Department of Environmental Quality
The Idaho Department of Environmental Quality performs “real-time” radiation measurements to monitor and gauge exposure rates in the environment on and around the Idaho National Laboratory.