The depth of penetration of radiation into tissue is a function of frequency with greater penetration at lower frequencies

Smart meters interfering with town radios

Woodstock Sentinel Review

Electronic interference from Hydro One
smart meters is forcing the Town of Ingersoll to replace radios linking key municipal offices. On Monday, council gave approval to transfer $4000 from the town's ...


Glasser: PG&E crossing the line on SmartMeters

Lake County News

Pointing media to the PG&E Web site which had stated that 39000 SmartMeters had been installed in Lake County when at that point in time, only 2500 meters had actually been installed. 2. Declaring a delay installation list that customers can be ...



April 13, 2011. Swanson and colleagues from the International Labour Office (Geneva, Switzerland) and the Bureau of Occupational Safety and Health, Public Health Services (Cincinnati, Ohio) reviewed guidelines for microwave radiation and published their review in the American Industrial Hygiene Association Journal, Vol. 31: 623-629 (1970).

Below is some information from this article. My comments appear in square brackets. To convert from mW/cm2 to microW/cm2 multiple by 1000.

United States

1. From 1940s to 1970s the use of microwave emitting equipment had increased considerably.

2. In the United States radio frequencies (RF) from 10 to 10,000 MHz were classified as microwave radiation, while in Europe the range was from 300 to 300,000 MHz. [NOTE: We now use the European range to delineate the microwave part of the radio frequency spectrum.]

3. By 1970, scientists recognized that parts of the body that are unable to dissipate heat are the most vulnerable to microwave radiation. This includes the lens of the eye (cataracts) and the reproductive organs (sterility or degenerative changes).

4. Depth of penetration of radiation into tissue is a function of frequency with greater penetration at lower frequencies.

5. In the United States the first guidelines were established during the Tri-Service conference, held in 1957. Below is a quote about the guidelines:

It was the opinion of those participating in the Conference that there were not sufficient data to determine safe exposure levels for each frequency, or ranges of frequencies, within the microwave region; therefore, a level of 10 mW/cm2 [10,000 microW/cm2] was selected for all frequencies. The U.S. Air Force, in adopting this exposure level in May 1958, applied it to the frequency range of 300 to 30,000 MHz and established it as a maximum permissible exposure level, which could not be exceeded. The only factor considered in this criterion is the power density level. Such factors as time of exposure, ambient environmental temperatures that could have an increased or decreased effect on the bodys thermal response, the frequency of the microwave energy, effects of multifrequency exposures, differing sensitivity of various body organs, and effect of air currents on cooling the body are not considered, although they are all recognized as factors that might affect biological response.

[NOTE: It was clear in 1970 that the US guidelines were somewhat arbitrary, were based on thermal effects only, and did not include other factors that influence biological and health consequences. This guideline has since been lowered from 10 to 1 mW/cm2 but is still 100 to 1000 times higher than guidelines in other countries.]

For more information and to download the pdf visit . .. ..

Dr Magda Havas


The future as Industry Canada sees it

Another member sent this as well, which pertains to the 700 MHz range.



Mast Cell Activation Syndrome

Is this also EHS?

The Role of the Brain and Mast Cells in MCS


Informant: Martin Weatherall

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