Atlas
Miami, FL
Listed for: Testing
Verified:Florida state license
Call Atlas at (305) 882-8200No website listed
Locations and reports
Radon in Miami, Florida
EPA puts Miami-Dade County, where Miami is, in Zone 2, its middle radon zone, and 39.6% of its 1,919 reported radon tests (2023) were at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
39.6%
21.1 pts above FL
- Miami-Dade
- 39.6%
- Florida
- 18.5%
Miami-Dade, 3rd of 30 in FL, 2023
Median result
2.8pCi/L
Below action level
- Miami-Dade
- 2.8 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Miami-Dade's tests, 2023
Nearest county
9.4%
Broward, 31 miles
- Broward
- 9.4%
- Miami-Dade
- 39.6%
2,165 tests, 2023
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
Miami-Dade, where Miami is
Tests reported
1,919
In Miami-Dade
- Miami-Dade
- 1,919
- Broward
- 2,165
Reported to CDC before any fix, 2023
Read a result for Miami
Starts at Miami-Dade County's median, 2.8 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.8 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Miami-Dade County's median reported result, 2023.
The data
Miami, What is published
What is published for Miami
Information:
Every figure for Miami is a county's
Radon data is published by county, not by city, so for Miami it is Miami-Dade County's: its EPA zone (Zone 2) and the 1,919 tests reported to CDC for 2023. Only a test tells you about one home.
Miami covers 36 square miles of land, all of it in Miami-Dade County. Its 489,812 residents live 13,608 to the square mile.
Miami, Counties
The county Miami lies in
MeasuredMiami-Dade County's EPA zone and the figures CDC publishes for it, 2023.
Miami-Dade CountyZone 2Moderate predicted potential
- 39.6%
- Reported tests at or above 4 pCi/L
- 2.8 pCi/L
- Median reported result
- 1,919 tests
- Tests reported to CDC
- 10
- Annual years on file
Miami-Dade County ranks 3rd of 30 Florida counties with 30 or more tests for that period, 21.1 points above the 18.5% pooled across Florida's counties, 6.2 points above the national pool of 33.4%.
Measured from the middle of Miami, the nearest counties with a CDC figure for 2023 are Broward County (31 miles, 9.4% of 2,165 tests), Palm Beach County (62 miles, 40.1% of 1,526 tests) and Collier County (74 miles, 22.7% of 1,607 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 1.4% to 40.1%; the farthest of them, Manatee County, is 175 miles away at 11.0%.
The directory lists 3 businesses with an address in Miami, 2 for testing and 1 for mitigation. Florida's other cities with a page of their own: Naples, Gainesville, Venice and Fort Myers.
The counties around Miami
By distance from the middle of Miami; counties with 30 or more tests.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2023.
Miami, Geology
The ground under Miami
PredictedUSGS's geologic map puts all of Miami's mapped land in one class: low radon potential. 71.4% of it lies in the area the map calls Gulf/Atlantic Lowland and Central Highland, to which USGS gives a radon index of 6, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Gulf/Atlantic Lowland and Central Highland | sand, silt, clay, gravel | Low | 6 | 71.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Miami beside its county and Florida
Miami-Dade County as a whole has 17.5% of its land rated moderate; none of that ground lies under Miami. Across Florida 7.1% of the land is rated moderate; none of Miami's is.
The map rates the ground, not the air in any home.
Miami, Homes
Homes in Miami
Miami has 219,809 homes, and many share a building: 60% are in buildings of five or more, 23% are detached houses, against 39% across Miami-Dade County. Half of its homes were built before 1978, close to Miami-Dade County's 1980: 31% date from before 1960 and 34% from 2000 or later. Most occupied homes here are rented: owners live in 31% (Miami-Dade County: 52%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Miami | Miami-Dade County | Florida |
|---|---|---|---|
| Housing units | 219,809 | 1,085,414 | 10,082,356 |
| Detached houses | 23% | 39% | 55% |
| In buildings of 5 or more | 60% | 44% | 25% |
| Mobile homes | 1% | 1% | 8% |
| Built before 1960 | 31% | 21% | 10% |
| Built since 2000 | 34% | 23% | 30% |
| Middle year built | 1978 | 1980 | 1988 |
| Owner-occupied | 31% | 52% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.
Local help
Miami, Professionals
Radon professionals listed in Miami
Businesses whose listed city is Miami, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.
Radon professionals listed in Miami: 1 of 3
3 listings with Miami as the city. See radon mitigation and testing in Miami, or all radon professionals in Florida.
Miami, Local resources
Local resources for Miami
Who to ask in Florida: its radon program, test kits and professionals.
What it means
Miami, Questions
Questions about radon in Miami
What radon zone is Miami in?
Miami has no zone of its own: it shares Miami-Dade County's, Zone 2, the map's middle class: a predicted county average of 2 to 4 pCi/L.
What are radon levels in Miami?
Around Miami, 39.6% of 1,919 tests reported from Miami-Dade County for 2023 reached 4 pCi/L or more, so a high result is no surprise here. The median reported result was 2.8 pCi/L.
Should I test my home in Miami?
Yes. Miami-Dade County reported about 760 of its 1,919 tests at or above 4 pCi/L. That is above Florida's pooled 18.5%, and ranks Miami-Dade County 3rd of the 30 Florida counties with 30 or more tests. Which homes they were, no map can say. How to test a home.
What ground is Miami built on, as far as radon goes?
USGS's geologic map puts 71.4% of Miami on one named area, "Gulf/Atlantic Lowland and Central Highland", rated low for radon potential, radon index 6.
Is radon higher in the counties around Miami?
It depends which way you go. 1 of the 8 nearest counties with a figure report a larger share than Miami-Dade County's 39.6% and 7 a smaller one: from Osceola County (1.4%, 167 miles off) to Palm Beach County (40.1%, 62 miles off).
Who tests for or fixes radon in Miami?
Miami is the address of 3 businesses in Radon411's directory, 2 listed for testing and 1 for mitigation. Each entry names the public list it came from. Radon professionals in Miami.
The answers use the published figures of Miami-Dade County, the county Miami lies in.
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