In-home EMF testing in St. Louis, MOA clear, honest reading of your home's invisible fields.
ClearfieldEMF is a professional in-home EMF testing service for the entire St. Louis metro — and, by arrangement, for projects across the greater Midwest. We measure the electric, magnetic, and radiofrequency levels in your home and explain exactly what the numbers mean.
Calibrated instruments Plain-language reports St. Louis metro & Midwest
Why homeowners choose ClearfieldEMF
Calibrated instruments
Dedicated, professionally calibrated instruments — not a phone app.
Plain-language reports
Room-by-room numbers with context, in a report anyone can follow.
Testing comes first
The reading and the report come before any talk of fixes — and remediation is always optional.
Trusted locallyServing the St. Louis metro since 2018
Why a measurement
We replace a vague worry with an actual number.
Most people who call us aren't panicking. They've just got a question they can't answer by looking around — a new smart meter on the wall, a bedroom that backs onto the breaker panel, a router sitting a little too close to a child's pillow. A measurement turns that hunch into something you can actually see.
We're also straight about the science. The strong, immediate effects of these fields are well understood, but the long-term effects of everyday low-level exposure are still genuinely debated. What testing gives you isn't a health verdict — it's a clear, documented picture of your own home.
All four EMF types measured every visit
Familiar with St. Louis housing, old and new
Honest reporting first — remediation only if you want it
People say EMF as if it's one number. It isn't — and a meter for one tells you nothing about the others. Every visit covers all four.
Electric fields
Volts per meter — V/m
Come from voltage — any wire in the wall and anything plugged in, switched on or not. Often most relevant in bedrooms, where you spend long, still hours close to the walls.
Come from current flowing — appliance motors, the panel, and utility lines down the street. They pass through walls almost untouched, so locating them matters most.
Come from transmitters — Wi-Fi, cell signal, cordless phones, and the smart meter outside. RF rises and falls with use, so we read it both at rest and under load.
High-frequency noise riding on your home's wiring, often from dimmers and electronics. Its health effects are still debated, but we'll measure it so you have the full picture.
From the first call to a finished report, here's exactly what to expect.
1
Request a quote
Tell us about the property — its age, the rooms you're concerned about, and what prompted the question. You get a flat price before anything is booked.
2
The walkthrough
We measure room by room with calibrated meters for all four EMF types. A typical home takes 1.5 to 2 hours, and you're welcome to follow along.
3
Your written report
Within 1 to 3 business days you get a plain-language report: numbers for each room, what's driving them, and a short list of practical notes — written so anyone can act on it.
Fixing what we find
Testing tells you where you stand. Remediation is the next step.
A report is only useful if you can act on it. When a reading is higher than you'd like, we can take it from there — remediation is a separate, optional service, quoted on its own so you decide with the numbers in front of you.
Practical, source-first fixesWe start with the cause — rerouted wiring, corrected grounding, relocated equipment — before reaching for shielding.
Handled in-house, start to finishWe handle all remediation work ourselves.
A clear, separate quoteRemediation is never bundled into your test. You see exactly what each fix costs and choose what's worth doing.
Dedicated meters kept in calibration — the difference between a guess and a reading you can rely on.
No pressure to fix
We report the numbers plainly. If remediation makes sense we'll say so, but the decision — and the timing — is always yours.
Reports in plain English
You get the numbers and what they mean for your home — not a spec sheet that needs its own translator.
Local knowledge
Century-old brick in South City and new construction in O'Fallon behave differently. Knowing both helps.
4
EMF types measured on every visit
1.5–2 hrs
Typical single-family walkthrough
1–3 days
Plain-language report after your visit
Service area
Based in St. Louis. Available across the Midwest.
The St. Louis metro is home, and it's where most of our week is spent. We also travel for projects throughout the greater Midwest — so if you're outside the metro, it's still worth asking.
Primary service area
The St. Louis metro, both sides of the river
Regular scheduling, standard pricing, and no travel charge. Most homes in these areas can be booked within about a week.
St. Louis City & County
Central West End
South City
Tower Grove
Clayton
Kirkwood
Webster Groves
University City
Ladue
Creve Coeur
Chesterfield
Ballwin
Maryland Heights
Florissant
Affton
Oakville
St. Charles County
St. Charles
St. Peters
O'Fallon
Wentzville
Cottleville
Lake Saint Louis
Dardenne Prairie
Weldon Spring
Surrounding Missouri counties
Jefferson County
Franklin County
Warren County
Lincoln County
Arnold
Festus
Imperial
Washington
Union
Wildwood
Metro East, Illinois
Edwardsville
Glen Carbon
Belleville
O'Fallon, IL
Collinsville
Alton
Granite City
Waterloo
Don't see your town listed? If you're within about an hour of downtown St. Louis, you're almost certainly covered. Send us the address
Beyond the metro
Projects across the greater Midwest
Distance work is a normal part of what we do. The same instruments, the same walkthrough, and the same plain-language report — just a bit more planning around the calendar.
Missouri and Illinois, statewideColumbia, Jefferson City, Springfield, Kansas City, Champaign, and the Chicago area.
Neighboring Midwest statesKansas, Iowa, Nebraska, Indiana, Kentucky, and Wisconsin — and farther by arrangement.
Travel quoted up frontAny mileage or overnight cost is folded into your flat quote before you book, so nothing appears afterward.
Grouped visits welcomeMore than one property, a family member nearby, or interested neighbors? We can often cover them on the same trip.
Regional trips are scheduled in blocks, so distance visits are usually booked two to three weeks out.
Outside the St. Louis area? Ask anyway.
Tell us where you are and what you'd like measured, and we'll come back with a straight answer: whether we can reach you, what the travel adds, and the dates we have open. If the distance genuinely doesn't work, we'll tell you that too — and point you toward what to look for elsewhere.
Send a few details and we'll reply within one business day with a flat price and a couple of dates that work. Prefer to talk it through first? That's normal — and there's no charge for the conversation.
Get a free quote
Just four quick fields to get started.
A reply within a business dayWith a flat quote — no obligation.
A visit that fits your scheduleWeekday and Saturday slots available.
Before you book
Questions people ask first.
What does a visit cost?
You get a flat price before you book, based on the home's size and location. Home assessments start at $349. There's no hourly meter running and no add-ons mid-visit — the figure you agree to is the figure you pay.
How long does it take?
About 1.5 to 2 hours for a typical single-family home. Larger houses, or homes where you'd like every room covered in detail, can run a little longer — we'll give you an estimate when we talk.
Do I need to prepare anything?
No — and it's better if you don't. Leave appliances, the router, and everything else exactly as they normally are, so the readings reflect how the home actually runs day to day.
Will you tell me my home is dangerous?
That's not a call we make, and you should be wary of anyone who does. We report what the meters read and compare it to common reference points. We won't hand you a health verdict the science can't actually back up.
Can you fix what you find?
Yes. If the report identifies something worth addressing, we offer remediation as a separate, optional service. It's quoted separately so you can review the findings and decide what's right for your home. We handle all remediation work ourselves, and there's never any pressure to book it.
How much does remediation cost?
It depends entirely on what the readings show — a rerouted circuit and a relocated router are worlds apart in scope. Once your report is done, we'll walk through the options and price each one separately, so you can take on as much or as little as makes sense. Testing never commits you to anything further.
Which areas do you cover?
The whole St. Louis metro is our primary area — St. Louis City and County, St. Charles County, the surrounding Missouri counties (Jefferson, Franklin, Warren, Lincoln), and the Metro East side in Illinois, including towns like Kirkwood, Webster Groves, Florissant, O'Fallon, Wentzville, Edwardsville, and Belleville. Beyond the metro, we travel for projects across the greater Midwest — Missouri and Illinois statewide, plus neighboring states — with any travel cost included in your quote up front. If you're farther out, contact us and we'll confirm availability for your dates. See the service area for the full picture.
