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BASIS FOR THE NIOSH RADIOFREQUENCY AND MICROWAVE RADIATION CRITERIA DOCUMENT

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Zorach (Zory) R. Glaser, Ph.D. · 1979

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NIOSH recognized RF health risks serious enough to warrant safety standards four decades before smartphones became ubiquitous.

Plain English Summary

Summary written for general audiences

This 1979 conference paper by Z. Glaser provided the scientific foundation for NIOSH's criteria document on radiofrequency and microwave radiation safety standards. The work synthesized existing research on RF and microwave health effects to establish occupational exposure guidelines. This represents one of the earliest comprehensive government efforts to translate EMF research into practical safety recommendations.

Why This Matters

This foundational NIOSH document represents a pivotal moment in EMF health policy - the first serious attempt by a major U.S. health agency to grapple with mounting evidence of radiofrequency health effects. What makes this particularly significant is the timing: 1979 predates the wireless revolution by decades, yet scientists were already concerned enough about RF exposure to develop formal safety criteria. The reality is that these early warnings were largely ignored as the telecommunications industry exploded in the following decades. Today's ubiquitous wireless devices expose us to RF levels that would have been unimaginable in 1979, yet our safety standards remain rooted in this era's understanding of biological effects.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 300 kHz to 300 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 300 kHz to 300 GHzPower lines50/60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study.

Study Details

To develop a criteria document and recommended standard for occupational exposure to radiofrequency (RF) and microwave radiation to protect workers from these radiations, based on extensive literature review, field studies, and expert consultations.

NIOSH conducted extensive literature reviews (over 5,000 citations, 3,000 relevant articles), field ...

Recommended occupational exposure limits for frequencies 300 kHz to 300 GHz with specific limits for...

The recommended standard provides protection for workers exposed to RF and microwave radiation, with limits based on human absorption characteristics and bioeffects data. The standard includes provisions for monitoring, medical surveillance, work practices, engineering controls, and recordkeeping. The limits are designed to prevent adverse effects over a 10-hour workshift, 40-hour workweek, over a working lifetime.

Cite This Study
Zorach (Zory) R. Glaser, Ph.D. (1979). BASIS FOR THE NIOSH RADIOFREQUENCY AND MICROWAVE RADIATION CRITERIA DOCUMENT.
Show BibTeX
@article{basis_for_the_niosh_radiofrequency_and_microwave_radiation_criteria_document_g6024,
  author = {Zorach (Zory) R. Glaser and Ph.D.},
  title = {BASIS FOR THE NIOSH RADIOFREQUENCY AND MICROWAVE RADIATION CRITERIA DOCUMENT},
  year = {1979},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

NIOSH developed scientific criteria for protecting workers from radiofrequency and microwave radiation exposure. This document synthesized existing research on RF health effects to establish occupational safety guidelines and exposure limits for workplace environments.
Growing scientific evidence of biological effects from radiofrequency exposure prompted NIOSH to develop formal safety criteria. The agency recognized potential health risks to workers in industries using RF equipment, decades before consumer wireless devices became widespread.
The criteria document addressed both radiofrequency and microwave radiation from various sources. This included industrial heating equipment, communications systems, radar installations, and other RF-generating devices used in occupational settings during the late 1970s.
This foundational document shows government scientists recognized RF health risks decades before smartphones existed. Today's wireless devices expose the general population to radiofrequency levels that were primarily occupational concerns when NIOSH first developed these safety criteria.
This represents one of the first comprehensive U.S. government efforts to translate RF research into practical safety standards. It established the scientific basis for protecting workers from electromagnetic radiation before wireless technology became a consumer phenomenon.