Energy Guide

EMF & RF Safety Levels - A Comparative Guide ScanTech
www.scantech7.com 214.912.4691
Hypothesized & Observed Animal Sensitivies to Magnetic Fields
Honeybees 0.25 mG
Homing Pigeons 0.1 mG
Sharks & Whales 0.5 mG
Lowest level to cause reaction in Electromagnetically Sensitive Patients 0.1 - 0.2 mG
Swedish Safety standard 1.0 mG (proposed US EPA standard)
California Safety Limit for Public Schools 1.2 mG
Indoor EMF levels (when good wiring practices followed) 0.1 – 1.2 mG
New Swiss Standard 2.5 mG ELF 0.25 mG VLF
Maximum residential levels in Brentwood TN & Irvine, CA 4 mG
Cancer researchers concerned with recent powerline issues are coming up with many reports on oncological effects of
very low-level 1 mG ELF electromagnetic fields
Leukemia studies which link low level EMF fields 2 - 4 mG
A study (Ahlbom & Feychting, 1993) reported that at 2 mG and above, exposed children were 2.7 times as likely to de-
velop cancer as unexposed children, and at 3 mG and above, the odds rose to 3.8 times as likely!
Computer Monitors - VDTs should produce magnetic fields of no more than 2 mG at a distance of 30 cm (about 1 ft) from
the front surface of the monitor and 50 cm (about 1 ft 8 in) from the sides and back of the monitor.
The TCO'92 standard has become a de facto standard in the VDT industry worldwide. A 1999 standard, promulgated by
the Swedish TCO (known as the TCO'99 standard), provides for international and environmental labeling of personal
computers. Many computer monitors marketed in the U.S. are certified as compliant with TCO'99 for low magnetic fields.
Indoor EMF levels with poor wiring practice 3 – 20 mG
Hotspots near breaker boxes, transformers 20 – 2000 mG
Directly beneath high voltage lines 2 – 250 mG
Amount which affects CRT computer monitors (flat screens immune) 10 mG
STRONGER EMF FIELDS
(please note that the DC Magnetic Fields listed are not generally attributed as having negative health effects -
and in fact, a number of alternative health experts actually recommend using magnets for healing and fitness)
Earth DC Magnetic Field (natural) 330 mG(equator) – 670 mG (poles)
Earth DC Magnetic Fields (affected by building structure) 200 mG – 800 mG
Recommended Limit for Pacemakers 1000 mG (1 Gauss)
Refrigerator Magnet (thin label type) 10 Gauss
Magnetic Field which could erase magnetic data 10 Gauss
Average Bar Magnet (DC) 100 Gauss
Independent research finds a change in blood behavior 500 Gauss
Strongest Inexpensive Ferrite Magnets 1000 Gauss
High magnetic field levels exceeding 100 Gauss (100,000 mG) may cause a temporary visual flickering sensation
called magnetophosphenes which disappears when the field is removed.
Gauss required to affect / erase magnetic tape 2000 - 3000 Gauss
Magnets used in Biomagnetic Therapy (DC) 300 - 3000 Gauss
High Powered Neodymium N42 - N45 Magnets (DC) 7500 - 9200 Gauss