Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in St. Lucie County, Florida
EPA puts St. Lucie County in Zone 3, its lowest radon zone, and only 9 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
3.2%
19.6 pts below FL
- St. Lucie
- 3.2%
- Florida
- 22.8%
2,223 tests, 2022
Median result
1.2pCi/L
Below action level
- St. Lucie
- 1.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2022
Tests reported
2,223
8th of 40 by tests
- St. Lucie
- 2,223
- Miami-Dade
- 9,033
Reported to CDC before any fix, 2022
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Florida
22 of 40
Middle half
- St. Lucie
- 3.2%
- Palm Beach
- 54.7%
By share, of 40 with 30+ tests
Read a result for St. Lucie County
Starts at St. Lucie County's median, 1.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.2 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. St. Lucie County's median reported result, 2022.
The data
St. Lucie County, At a glance
St. Lucie County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 94% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for St. Lucie County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 17.4% |
| 2015 | 0.0% |
| 2016 | 43.6% |
| 2017 | 46.6% |
| 2018 | 25.0% |
| 2019 | 0.0% |
| 2020 | 0.0% |
| 2021 | 5.4% |
| 2022 | 3.2% |
| 2023 | 0.0% |
2023: 0.0%. Across these years the share ran from 0.0% to 46.6%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 9 tests were reported to CDC for St. Lucie County over 2023, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
St. Lucie County, Compared
St. Lucie County radon figures, compared
Calculated by Radon411Only 72 of 2,223 radon tests reported for St. Lucie County in 2022 reached 4 pCi/L (3.2%). The median result, 1.2 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 8.5 pCi/L.
The newest figure, in 2023, counts only 9 tests (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 2,223-test figure.
Across 54 Florida counties pooled together, 22.8% of tests reached that level, so St. Lucie County runs 19.6 points below its state. Against the national pool of 23.9%, the gap is 20.7 points lower. Its place in the state: 22nd of 40 Florida counties with 30 or more tests for the same period.
Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 3.2% share point the same way here. Of 2 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 0.0% (Martin County) to 13.8% (Indian River County).
Below the action level, 1,806 tests (81.2%) came in under 2 pCi/L, against 52.6% statewide, and 345 tests (15.5%) fell between 2 and 4, against 24.6% statewide. Over 5 years of annual figures the share fell 40.4 points, from 43.6% in 2016 to 3.2% in 2022; its peak was 46.6% in 2017. USGS geology rates 94% of the county's land low radon potential.
The busiest year on file was 2022, with 2,223 tests reported; the quietest, 2019, had 1.
St. Lucie CountyFlorida, pooled
3.2% % of tests22.8% % of tests
| Year | Tests | St. Lucie County, at or above 4 pCi/L | Florida, pooled |
|---|---|---|---|
| 2016 | 78 | 43.6% | 24.3% |
| 2017 | 58 | 46.6% | 21.7% |
| 2020 | 36 | 0.0% | 23.2% |
| 2021 | 93 | 5.4% | 15.4% |
| 2022 | 2,223 | 3.2% | 22.8% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
St. Lucie County, Geology
The ground under St. Lucie County
PredictedUSGS's geologic map puts all of St. Lucie County's mapped land in one class: low radon potential. The map puts 92.1% of St. Lucie County in the area it calls Gulf/Atlantic Lowland and Central Highland and 2.2% in Coastal barrier islands. USGS gives both 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 | 92.1% |
| Coastal barrier islands | Sand, silt, clay, gravel | Low | 6 | 2.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
St. Lucie County beside the ground around it
Across Florida 7.1% of the land is rated moderate; none of St. Lucie County's is. None of the 3 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
St. Lucie County, Local resources
Radon testing and mitigation in St. Lucie County
- Florida’s Radon ProgramFlorida’s Radon Program, run by Florida Department of Health, licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Florida.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Protect your family by requesting a FREE radon test kit.
- Compare kits
- Professionals in Florida77 professionals are listed in Florida.
What Florida's program says
- Phone
- 850-245-4288
- PHtoxicology@FLhealth.gov
- Licensing of radon professionals
Florida Statutes require the certification of businesses and individuals providing radon services or any other radon related activity.
What it means
St. Lucie County, Questions
Questions about radon in St. Lucie County
Are radon levels high in St. Lucie County?
In 2023, 0.0% of the radon tests reported to CDC for St. Lucie County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.5 pCi/L. Of 40 Florida counties with 30 or more tests for the same period, 21 reported a higher share; pooled, the state comes to 22.8%.
Which counties border St. Lucie County?
St. Lucie County borders 3 counties: Indian River County, Martin County and Okeechobee County.
Products
St. Lucie County, Products
Testing a home in St. Lucie County
In St. Lucie County, 3.2% of 2,223 tests reported to CDC in 2022 reached 4 pCi/L, against 22.8% pooled across Florida. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in St. Lucie County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorAEGTEST
HOUND-3699 radon monitor with a 2.1-inch touchscreen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
First reading: Within 1 hour
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
St. Lucie County, Bordering counties
Counties bordering St. Lucie County
Calculated by Radon411- Radon levels in Indian River CountyEPA zone 3
13.8%at or above 4 pCi/L
Median 0.5 pCi/L · 87 tests · 10.6 points above St. Lucie County
- Radon levels in Martin CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.5 pCi/L · 1,284 tests · 3.2 points below St. Lucie County
- Radon levels in Okeechobee CountyEPA zone 3
No CDC figure for 2022; its page reads it against its own neighbours.
St. Lucie County, Cities and towns
Cities and towns in St. Lucie County
St. Lucie County is growing: the Census Bureau puts it at 402,449 residents on July 1, 2025, up 21.4% from 331,453 in 2020. That works out to 704 people per square mile of land. Port St. Lucie alone is home to 268,062 of them, 66.6% of the total. Together its 3 incorporated places hold 79.6% of those residents; the other 20.4% live outside any of them. Testing is reported here more often than across the state: CDC's 2,223 reported tests for 2022 come to 5.5 for every 1,000 residents (2025 estimate), against 2.6 for Florida.
From Port St. Lucie to St. Lucie Village, CDC publishes no figure by town: each reads St. Lucie County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Port St. Lucie | 268,062 | +29.6% | 66.6% |
| Fort Pierce | 51,737 | +8.8% | 12.9% |
| St. Lucie Village | 642 | +1.7% | 0.2% |
3 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).
St. Lucie County, Homes
Homes in St. Lucie County
Of St. Lucie County's 154,930 homes, 71% are detached houses, against 55% across Florida; 14% are in buildings of five or more homes. Half of its homes were built before 1994, close to Florida's 1988: 5% date from before 1960 and 40% from 2000 or later. Owners live in 78% of the occupied homes (Florida: 67%), so for most households a test and a fix are their own to order.
| Homes | St. Lucie County | Florida |
|---|---|---|
| Housing units | 154,930 | 10,082,356 |
| Detached houses | 71% | 55% |
| In buildings of 5 or more | 14% | 25% |
| Mobile homes | 7% | 8% |
| Built before 1960 | 5% | 10% |
| Built since 2000 | 40% | 30% |
| Middle year built | 1994 | 1988 |
| Owner-occupied | 78% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.