8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Whole Body / General

A Review of International Microwave Exposure Guides

Bioeffects Seen

JON R. SWANSON, VERNON E. ROSE, CHARLES H. POWELL · 1970

Share:

International microwave safety standards varied dramatically from the start, revealing policy gaps that persist today.

Plain English Summary

Summary written for general audiences

This 1970 review examined international microwave exposure guidelines, comparing safety standards between the US, Russia, Poland, and England. The study found significant differences between countries, with the US Air Force initially setting limits at 10 milliwatts per square centimeter in 1958. The analysis revealed that various nations had developed different approaches to protecting workers from microwave radiation based on their interpretation of biological evidence.

Why This Matters

This historical review reveals how fractured international consensus was on microwave safety from the very beginning of the wireless age. The fact that different countries established wildly different exposure limits based on the same scientific evidence shows how political and economic considerations influenced public health policy. What's particularly striking is that this review was published in 1970, yet we're still dealing with the same fundamental disagreements about EMF safety standards today. The 10 milliwatt per square centimeter limit established by the US Air Force became the foundation for many current guidelines, despite being based on limited 1950s research focused only on heating effects. This pattern of setting standards first and asking questions later has defined EMF policy for decades, leaving the public exposed to technologies whose long-term effects remain largely unknown.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
JON R. SWANSON, VERNON E. ROSE, CHARLES H. POWELL (1970). A Review of International Microwave Exposure Guides.
Show BibTeX
@article{a_review_of_international_microwave_exposure_guides_g4652,
  author = {JON R. SWANSON and VERNON E. ROSE and CHARLES H. POWELL},
  title = {A Review of International Microwave Exposure Guides},
  year = {1970},
  
  
}

Quick Questions About This Study

The United States Air Force established the first official microwave exposure limit in 1958, setting a maximum of 10 milliwatts per square centimeter. This became the foundation for many current EMF safety guidelines still used today.
Countries interpreted the same scientific evidence differently, leading to varying safety standards. Political, economic, and military considerations influenced how each nation balanced potential health risks against technological benefits and industrial interests.
The review compared microwave exposure guidelines from the United States, England, Russia, Poland, and other nations. Each country had developed different approaches to protecting workers from occupational microwave radiation exposure.
The development of radar and range-finder equipment in the early 1940s led to considerable increases in higher frequency microwave generating equipment use, creating new occupational exposure concerns that required safety guidelines.
Many organizations moved beyond simple exposure limits to incorporate other biological response factors. This represented recognition that microwave effects involved more complex interactions than just basic power density measurements.