Search any US address to see nearby cell towers, transmission lines, and substations — and get a combined exposure score for both RF and ELF.
Not sure where to start? Take the 90-second exposure quiz
Or watch the 56-second explainerTracking 570,622 transmitters · FCC ASR · OpenCelliD · HIFLD · filings synced daily
01 · How it works
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Search any US address or use your current location to check what's nearby.
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Cell towers, power lines, and substations on an interactive map, with exact distances.
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A clear 0–100 EMF score, so you can make informed decisions about where you live.
RF (towers · 2 mi) + ELF (power grid · 1 mi) = EMF SCORE 0–100
Lower is better · RF covers towers within 2 mi · ELF covers power lines & substations within 1 mi
Free — no signup required
02 · Live map
We track 570,622 cell towers and 94,619 power lines across the US. Check any address to see exactly what's nearby — and how close.
Free on the App Store
Measure real-time EMF readings with your phone — at home, at work, or while house hunting.
03 · Field guide
What it is, where it comes from, and what the research actually says.
Basics
What electromagnetic fields are, where they come from, and why people worry about them.
Distance
How close is too close to a cell tower or power line? What to check before buying or renting.
Mitigation
Practical steps to lower EMF at home — from free changes to full shielding.
Professional testing
Connect with certified EMF consultants in your area who can assess your home, identify exposure sources, and recommend solutions.
04 · The board
Highest exposure
Based on average city scores. Learn about our methodology
Explore All Cities05 · By state
Compare EMF levels across states to find lower-exposure areas.
8 cities
1 city
12 cities
2 cities
155 cities
14 cities
11 cities
1 city
06 · News wire
A small New Hampshire town just became a case study in how much power local residents actually have when a wireless company wants to put a cell tower in their backyard. The Hancock Planning Board voted 3-1 to deny an application from Industrial Tower and Wireless to build a cell tower off Lee Farm Road — and now the company is suing the town over that denial.
The Pentagon just announced a new chapter in military tech that's worth understanding if you pay attention to electromagnetic exposure: the Department of Defense has selected four directed energy systems for a year-long counter-drone pilot program. The systems — AeroVironment's Palletized High-Energy Laser, Epirus' Leonidas high-powered microwave system, Kord's Firefly high-energy laser, and Boeing's Compact Laser Weapon System — will be tested by Joint Interagency Task Force 401 to see how they perform against real-world drone threats.
A UK company called Cambridge Heartwear has reportedly been awarded a £184 million NHS tender to supply what's being described as the world's first medical-grade, wirelessly charged, reusable ECG wearable. Beyond the headline details, specifics about the device's design, rollout timeline, and wireless charging specs haven't been widely detailed, but the news is already generating interest among people who pay close attention to wearable tech and the wireless signals that come with it.
07 · Articles
WiFi 6E and 7 added a third band. The FCC holds indoor 6 GHz access points to a lower power density than 5 GHz — here is what that changes at home.
A Dexcom G7 transmits at 1.0 mW for a few seconds every five minutes. Here are the real radio numbers for Dexcom and Libre sensors, from the manuals.
Nest and ecobee thermostats carry a WiFi radio, a Bluetooth radio, and now a radar sensor. What each one emits, and which one actually matters.
The spinning turret on a robot vacuum is an eye-safe laser, not a radio. The WiFi is the real emitter — and it spends most of the day parked on the dock.
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