Find out what's actually in the room.
You can't see an electromagnetic field, and you can't judge one by looking at the room it's in. EMF testing measures the fields actually present in a building — where they come from, how strong they are, and how much of that reaches the desk you work at or the bed you sleep in. Our certified inspectors survey the property and give you readings tied to real locations, not one number for the whole house.
Electromagnetic fields, or EMF, consist of energy waves that are emitted by electrical devices. EMF testing is used to evaluate the health effects of electromagnetic radiation in a building. Our body also produces electromagnetic fields, but these fields are low in intensity. Exposure to high-intensity electromagnetic fields from external sources — such as appliances, power lines and electronic devices — can potentially impact our health over time.
Conducting EMF testing is often an essential component of creating a safe living or working environment, as one of our environmental services. By identifying sources of electromagnetic radiation, it becomes possible to reduce potential exposure and promote overall well-being in indoor spaces.
Electromagnetic fields are produced by the voltage present in an electrical system. Higher voltage means a stronger electric field — which is why these four source groups behave so differently from one another.
Power Lines & Service Entry
EMF · SUPPLYIn suburban and urban areas, many people live close to overhead powerlines, which means they are exposed to strong artificial electromagnetic fields. These carry the highest voltages anywhere near a property, and the point where that supply enters the building — the meter, the service entry and the panel — is usually the single strongest location inside it.
Household Appliances
EMF · APPLIANCESMicrowaves and other household appliances draw the most current in the building, so the fields around them are strongest while they are actually running. Motors and heating elements are the reason — and the field drops away just as quickly once the cycle finishes.
Electronics & Screens
EMF · ELECTRONICSCell phones, televisions and computers draw far less current than a dryer — but they are usually a great deal closer to a person, and running for far longer. Proximity and duration are what make this group worth measuring, not raw strength.
Wiring & Power Strips
EMF · WIRINGPower strips — and any other item that carries voltage — produce a field of their own, including the wiring running inside the walls. This is the group people forget, because it is invisible: bundled cable behind a desk, a bed headboard against a wired wall, or a media console full of adapters.
Everyday devices that produce electromagnetic fields
The electromagnetic spectrum shows that EMFs fall into two categories. The difference between them is the difference between a reading worth noting and a reading worth acting on.
Where a source sits on the spectrum decides what its measurement actually means. Almost everything in a home falls on the non-ionizing side — so a number on its own tells you very little until you know which category produced it.
Non-Ionizing
LOWER ENERGYThese have relatively little impact on human health. They are not known to damage DNA or human cells. This is the category the overwhelming majority of what a survey finds in a building belongs to.
Ionizing
HIGHER ENERGYThese have harmful effects on human health and can potentially damage DNA and human cells. They carry enough energy to strip electrons from atoms — which is precisely what the household side of the spectrum cannot do.
The electromagnetic spectrum, non-ionizing through ionizing
Some people report a consistent set of symptoms they associate with being around electromagnetic fields. Testing can't diagnose that — but it can tell you what is actually present where you spend your time.
Electromagnetic hypersensitivity (ES) is a physiological disorder characterized by symptoms directly brought on by exposure to electromagnetic fields. It produces neurological and allergic-type symptoms. Symptoms may include but are not limited to:
This list is informational and is not a diagnosis. Symptoms like these have many possible causes — speak with a physician about the symptoms themselves. What an EMF survey contributes is the other half of the picture: a record of what fields are actually present in the rooms you use, and where they come from.
A useful EMF survey isn't one number for the house. It is a set of readings tied to specific sources and specific distances — because both of those change the answer.
Locate what's actually producing fields: the panel and service entry, proximity to overhead or underground lines, appliance placement, and where the wiring runs relative to the rooms people use most.
Readings are taken at each identified source, with appliances measured under normal operation — a microwave that isn't running tells you nothing about a microwave that is.
The same readings are repeated at occupied distance — at the desk, the bed, the sofa, the crib. Because field strength falls off sharply with distance, this is the number that actually describes your exposure.
Every reading is recorded against its location, its source and the distance it was taken from, so the results can be compared, revisited later, and acted on where it makes sense to.
There is no way to see an electromagnetic field, and no way to judge one by looking at the room it's in. A survey replaces the guess with a measurement.
Every appliance that carries voltage produces a field of its own
It is worth doing if you live close to power lines, if you are moving into a property whose electrical system you don't know, if a home office or a child's bedroom shares a wall with the panel — or simply if you'd rather know than wonder.
Most of what a result asks of you is unglamorous: moving a bed away from a wall, relocating a power strip, rearranging a desk. The value is in knowing which of those is worth doing — and which would change nothing at all.
Get an idea of the format and the items listed in an environmental testing report before you book — then schedule your EMF testing when you're ready.
