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Radio Frequency

Radio frequency nonionizing radiation in a community exposed to radio and television broadcasting.

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Burch JB, Clark M, Yost MG, Fitzpatrick CT, Bachand AM, Ramaprasad J, Reif JS. · 2006

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RF radiation from broadcast towers varies up to 30-fold based on visibility and changes significantly over time at most locations.

Plain English Summary

Summary written for general audiences

Researchers measured radio frequency radiation levels at 280 homes near Denver's broadcasting towers over 2.5 days, then repeated measurements 1-2 years later. They found that RF exposure varied dramatically based on distance, elevation, and line-of-sight visibility to transmitters, with homes having clear views of towers experiencing 13-30 times higher radiation levels. Most importantly, RF levels changed significantly over time, with only 25% of outdoor and 38% of indoor measurements remaining stable after 1-2 years.

Why This Matters

This study reveals a critical flaw in how we assess RF exposure from broadcasting infrastructure. The finding that RF levels changed dramatically over time at most locations challenges the common assumption that living near broadcast towers means consistent exposure. The 13-30 times difference in radiation levels between homes with clear views versus obstructed views of transmitters demonstrates how dramatically geography affects your daily RF dose. What this means for you is that proximity alone doesn't determine your exposure. The reality is that your home's specific location, elevation, and what's blocking the signal path to nearby towers can make an enormous difference in your RF exposure levels. This research also highlights why single-point-in-time measurements used in many health studies may miss the full picture of long-term exposure patterns.

Exposure Information

Specific exposure levels were not quantified in this study.

Study Details

This study quantified RF exposures among 280 residents living near the broadcasting transmitters for Denver, Colorado.

RF power densities outside and inside each residence were obtained, and a global positioning system ...

The greatest differences appeared among homes within 1 km of the transmitters. Overall, there were n...

This study demonstrated that both spatial and temporal factors contribute to residential RF exposure and that GPS/GIS technologies can improve RF exposure assessment and reduce exposure misclassification.

Cite This Study
Burch JB, Clark M, Yost MG, Fitzpatrick CT, Bachand AM, Ramaprasad J, Reif JS. (2006). Radio frequency nonionizing radiation in a community exposed to radio and television broadcasting. Environ Health Perspect. 114(2):248-253, 2006.
Show BibTeX
@article{jb_2006_radio_frequency_nonionizing_radiation_1935,
  author = {Burch JB and Clark M and Yost MG and Fitzpatrick CT and Bachand AM and Ramaprasad J and Reif JS.},
  title = {Radio frequency nonionizing radiation in a community exposed to radio and television broadcasting.},
  year = {2006},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/16451862/},
}
PubMed: 16451862

Cited By (34 papers)

Quick Questions About This Study

Yes, radio tower radiation levels change significantly over time. A Denver study found that only 25% of outdoor and 38% of indoor RF measurements remained stable after 1-2 years, showing that exposure levels fluctuate considerably in residential areas.
Homes with clear views of TV and radio towers experience 13-30 times higher radiation levels than homes without direct visibility. This dramatic difference occurs even at distances of 1-3 kilometers from broadcasting transmitters.
Yes, elevation significantly affects radiation exposure from broadcasting towers. The Denver study found that increasing elevation, along with proximity and line-of-sight visibility, were each associated with elevated RF exposures from radio and television transmitters.
Yes, GPS and GIS technologies can significantly improve radiation exposure assessment accuracy. Researchers found these tools help reduce exposure misclassification by better accounting for spatial factors like distance, elevation, and transmitter visibility.
No, radiation exposure varies dramatically within 1 kilometer of broadcast towers. The study found the greatest differences in RF levels appeared among homes within this distance, with exposure depending on elevation and tower visibility.