This page has some figures for average exposure levels to Extremely Low Frequency (ELF) Magnetic Fields from some selected common household appliances.
First of all, let's remember that because a mechanism of action has not been established, relying on magnetic-field levels only in an attempt to protect yourself, might give you a FALSE SENSE OF SECURITY. These figures also neglect other emissions at different frequencies, (relevant to VDTs) and electric fields.
But even given the unknowns, a gross representation of magnetic field strength might at least allow us to:
- arrange our homes so we spend less time near high-current appliances,
- moderate or curtail the use of some appliances we feel may not be justified,
- just get a better overview of where the fields in our homes come from.
Remember that magnetic fields come from moving electric current, so the more current your appliance uses, the greater the magnetic field; for a given line voltage, (ie: 120 VAC), the greater the power in WATTS, the greater the current, and the resulting magnetic field. Even small electric motors are big magnetic field sources.
You can purchase an inexpensive Gaussmeter from the EMR Alliance for about $40 to do baseline measurements around your home.
The following table is populated with data that orignated from the IEEE [1]
Magnetic Field in Milligauss
| Appliance | At 4 inches (10 cm) | At 1 foot (30 cm) | At 3 feet (1 m) |
| Blenders | 50 - 220 | 5.2 - 17 | 0.3 - 1.1 |
| Can openers | 1300 - 4000 | 31 - 280 | 0.5 - 7.0 |
| Clothes dryers | 4.8 - 110 | 1.5 - 29 | 0.1 - 1 |
| Clothes washers | 2.3 - 3 | 0.8 - 3.0 | 0.2 - 0.48 |
| Coffee makers | 6 - 29 | 0.9 - 1.2 | <0.1 |
| Crock pots | 8 - 23 | 0.8 - 1.3 | <0.1 |
| Drills | 350 - 500 | 22 - 31 | 0.8 - 2.0 |
| Electric shavers | 14.0 - 1600 | 0.8 - 90 | <0.1 - 3.3 |
| Faust blowers | 3 - 120 | 0.25 - 37 | <0.1 - 3.1 |
| Flourescent desk lamps | 100 - 200 | 6 - 20 | 0.2 - 2.1 |
| Flourescent fixtures | 40 - 123 | 2 - 32 | <0.1 - 2.8 |
| Hair dryers | 3 - 1400 | <0.1 - 70 | <0.1 - 2.8 |
| Irons | 12 - 45 | 1.2 - 3.1 | 0.1 - 0.2 |
| Mixers | 58 - 1400 | 5 - 100 | 0.15 - 2.0 |
| Portable heaters | 11 - 280 | 1.5 - 40 | 0.1 - 2.5 |
| Sabre and circular saws | 200 - 2100 | 9 - 210 | 0.2 to 10.0 |
| Televisions | 4.8 - 100 | 0.4 - 20 | <0.1 - 1.5 |
| Toasters | 10 - 60 | 0.6 - 7.0 | <0.1 - 0.11 |
| Vacuum cleaners | 230 - 1300 | 20 - 180 | 1.2 - 18.0 |
Anecdotally, I have an electric stove with an 1800 WATT quick-heating burner. These are the measurements I have made on this one burner:
Magnetic Field in Milligauss
| Appliance | At 6 inches (15 cm) | At 1 foot (30 cm) | At 3 feet (1 m) |
Electric stove (one burner) | 100
| 9 | <1 |
Household Appliance Magnetic Field Data
The IEEE table above was in all probability populated with data from the following data set.[2]
"This presentation utilizes data that was provided by the EMF RAPID Measurements Database and contributed by James Gauger of IIT Research Institute."
This is a flat file database, I didn't bother to normalize it into tables. The side effect is that there are some appliances that are arranged as subcategories, that I don't agree with; for instance, most people do not consider a humidifier to be a fan, nor do they consider a hot-air pop-corn popper to be a form of blender. However, it may be useful to see the original data that the above table was presumably based upon.
Below, you may select a type of appliance from the list, and a table will be created from the official EMF RAPID Household Appliance Magnetic Field Data database, with all records for that category of appliance displayed.
Here is the record structure of the original data-set:
| 1 Item ID | 2 Category | 3 Description | 4 Distance | 5 Memo | 6 Field Strength |
- Item ID: A unique identifier for each appliance measured.
- Category: The general category of the tested appliance.
- Description: A sub-category for appliances.
- Distance: The distance measured in feet, from appliance under test.
- Memo: A memo field for measurement criteria.
- Field Strength: Measured in milligauss.
Note that the Category will not be displayed for every record, and the order of fields will be different on the output from the query. Output will be arranged like this:
| 1 Item ID | 2 Description | 3 Distance | 4 Field Strength | 5 Memo |
Distance will be displayed in INCHES, not feet; magnetic field will be in milligauss, (mG); (for fields expressed in µTeslas, (µT), divide by ten.)