Statutes, codes, and regulations
Code of Massachusetts Regulations
Department 105 CMR - DEPARTMENT OF PUBLIC HEALTH
Title 105 CMR 122.000 - Nonionizing Radiation Limits For: The General Public From Non-occupational Exposure To Electromagnetic Fields, Employees From Occupational Exposure To Electro-magnetic Fields, And Exposure From Microwave Ovens
Section 122.015 - Non-occupational Radiofrequency Exposure Limits for the General Public

105 CMR, § 122.015

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Current through Register 1538, January 3, 2025
Section 122.015 - Non-occupational Radiofrequency Exposure Limits for the General Public
(A) No person shall knowingly operate or allow for the operation of a radiofrequency machine in a manner that exposes or may expose any member of the public in a regularly occupied space within the Commonwealth of Massachusetts, to a radiofrequency electromagnetic field which has a mean squared electric or magnetic field strength or an equivalent plane wave free-space power density in excess of the applicable Radiofrequency Exposure Limits listed in 105 CMR 122.015: Table I.
(B) In the event of scan failure or other failure in the normal parameters of the scanning operation causing a change in angular velocity, amplitude duration, or rate of exposure, no radiofrequency machine which emits scanned radiofrequency radiation in areas accessible to the public shall be operated without protective measures to prevent exposure in excess of the radiofrequency exposure limits listed in 105 CMR 122.015: Table I.

105 CMR 122.015: TABLE I

NON-OCCUPATIONAL RADIOFREQUENCY EXPOSURE LIMITS FOR THE GENERAL PUBLIC1

Frequency Range

Maximum Allowed Mean Squared Electric Field Strength (V/m)2

Maximum Allowed Mean Squared Magnetic Field Strength (A/m)2

Maximum Allowed Equivalent Plane Wave Free Space Power Density2 (mW/cm2)

300kHz-3MHz

80,000

0.5

20.0

3MHz-30MHz

800(900/f2)

0.005(900/f2)

180/f2

30MHz-300MHz

800

0.005

0.2

300MHz-1500MHz

800(f/300)

0.005(f/300)

f/1500

1500MHz-100GHz

4,000

0.025

1.0

As used in Table I:

f = frequency in megahertz (MHz)

V = voltage in volts

A = current in amperes

m = length in meters

cm2 = area in square centimeters

mW = power in milliwatts

For mixed or broadband fields consisting of a number of frequencies for which different Radiofrequency Protection Guides are listed in 105 CMR 122.015: Table I, the fraction of the Radiofrequency Exposure Limits incurred within each frequency interval shall be determined, and the sum of all such fractions shall not exceed unity.

105 CMR, § 122.015