Learn About Radiation Units
Different terms and units are used to measure radioactivity and estimate health effects.
Calculate Your Radiation Dose
Try our Radiation Dose Calculator
You can estimate your yearly dose from natural, technological, and medical sources of ionizing radiation.
Understand Radiation Health Effects
Radiation Communication Tools
Pre-scripted messages for emergency response
Q&As and templates for users of the 2017 Protective Action Guide (PAG) Manual
EPA sets environmental standards and provides technical expertise to protect human health and the environment from the use of radioactive materials. EPA standards set protective limits on the radioactivity in soil, water and air that comes from human activities. The Agency supports other federal, state and local agencies by developing federal guidance and technical reports on radiation protection, and assists in response to radiological emergencies.
RadTown is the EPA’s radiation education website. Students can learn about the different types, sources, and uses of radioactive material. Teachers can download classroom materials and fact sheets about various radiation topics that are related to everyday life.