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Radon Levels in Volusia County, Florida

EPA puts Volusia County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 1.2% of 163 (2023) reached 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    1.2%

    17.3 pts below FL

    Volusia
    1.2%
    Florida
    18.5%

    163 tests, 2023

  • Median result

    0.6pCi/L

    Below action level

    Volusia
    0.6 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2023

  • Tests reported

    163

    18th of 30 by tests

    Volusia
    163
    Broward
    2,165

    Reported to CDC before any fix, 2023

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

  • Rank in Florida

    21 of 30

    Middle half

    Volusia
    1.2%
    Marion
    44.5%

    By share, of 30 with 30+ tests

Read a result for Volusia County

Starts at Volusia County's median, 0.6 pCi/L

0.6pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 0.6 pCi/L

Below 2 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Volusia County's median reported result, 2023.

Interpret this reading

The data

Volusia County, At a glance

Volusia County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Volusia County as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

USGS geologic potential: Low across 98% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Volusia County, 2023

Share of reported tests at or above 4 pCi/L, by year, Volusia County
Share of reported tests at or above 4 pCi/L, by year, Volusia County
YearShare of reported tests at or above 4 pCi/L
20140.0%
20150.0%
20168.3%
20170.0%
20181.1%
20192.8%
20200.6%
20210.0%
20220.0%
20231.2%

2023: 1.2%. Across these years the share ran from 0.0% to 8.3%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 163 tests reported to CDC for Volusia County over 2023, many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.

Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

How to read these figures

Volusia County, Compared

Volusia County radon figures, compared

Calculated by Radon411

Only 2 of 163 radon tests reported for Volusia County in 2023 reached 4 pCi/L (1.2%). The median result, 0.6 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 10.4 pCi/L.

Across 49 Florida counties pooled together, 18.5% of tests reached that level, so Volusia County runs 17.3 points below its state. Against the national pool of 33.4%, the gap is 32.2 points lower. Its place in the state: 21st of 30 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 1.2% share point the same way here. Of 5 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 0.0% (Brevard County) to 44.5% (Marion County).

Below the action level, 156 tests (95.7%) came in under 2 pCi/L, against 57.3% statewide, and 5 tests (3.1%) fell between 2 and 4, against 24.2% statewide. Over 8 years of annual figures the share held within 2 points, from 0.0% in 2015 to 1.2% in 2023; its peak was 2.8% in 2019. USGS geology rates 98% of the county's land low radon potential.

The busiest year on file was 2022, with 354 tests reported; the quietest, 2014, had 11.

Share of reported tests at or above 4 pCi/L by year, Volusia County against Florida2015 to 2023, years with 30 or more tests: Volusia County 0.0% to 1.2%, the state's pooled share 18.5% in 2023.
Volusia CountyFlorida, pooled
Share of reported tests at or above 4 pCi/L by year, Volusia County against Florida: data table
YearTestsVolusia County, at or above 4 pCi/LFlorida, pooled
2015940.0%26.5%
2017300.0%21.7%
20181891.1%23.5%
2019362.8%29.6%
20201740.6%23.2%
20213510.0%15.4%
20223540.0%22.8%
20231631.2%18.5%
Volusia County against Florida, the United States and nearby counties, 2023
AreaTestsAt or above 4 pCi/LMedianDifference from Volusia County
Volusia County1631.2%0.6 pCi/LThis county
Florida, pooled49 counties, pooled16,58918.5%Not pooled+17.3 points
United States, pooled642 counties, pooled128,74033.4%Not pooled+32.2 points
Palm Beach Countyhighest in the state1,52640.1%3.0 pCi/L+38.9 points
Clay Countylowest in the state360.0%1.0 pCi/L−1.2 points
Flagler County, FLborders it2100.0%6.4 pCi/L+98.8 points
Marion County, FLborders it18244.5%3.6 pCi/L+43.3 points
Orange County, FLborders it1,1079.5%0.9 pCi/L+8.3 points
Seminole County, FLborders it1901.6%0.6 pCi/L+0.4 points
Lake County, FLborders it1590.0%0.6 pCi/L−1.2 points
Brevard County, FLborders it2050.0%0.7 pCi/L−1.2 points
Putnam County, FLborders it100.0%0.9 pCi/L−1.2 points
Where Volusia County's reported results fell, 2023, beside Florida and the United States
ResultVolusia County testsVolusia County shareFlorida shareU.S. shareAgainst Florida
Under 2 pCi/L15695.7%57.3%41.4%+38.4 points
2 to 4 pCi/L53.1%24.2%25.2%−21.1 points
4 pCi/L and above21.2%18.5%33.4%−17.3 points
Volusia County ranked among the 30 Florida counties with 30 or more tests, by share at or above 4 pCi/L, 2023
CountyRankTestsAt or above 4 pCi/LMedian
Duval County16 of 307926.2%0.4 pCi/L
Pinellas County17 of 305595.9%1.2 pCi/L
Wakulla County18 of 30313.2%0.8 pCi/L
Seminole County19 of 301901.6%0.6 pCi/L
Osceola County20 of 30701.4%1.2 pCi/L
Volusia County21 of 301631.2%0.6 pCi/L
Pasco County22 of 301640.6%0.8 pCi/L
Brevard County23 of 302050.0%0.7 pCi/L
Lake County23 of 301590.0%0.6 pCi/L
Bay County23 of 301330.0%0.4 pCi/L
St. Johns County23 of 30960.0%0.7 pCi/L
Volusia County radon tests by year, against Florida's pooled share
YearTestsAt or above 4 pCi/LMedianHighestFlorida, pooledChange from the row before
20231631.2%0.6 pCi/L10.4 pCi/L18.5%+1.2 points
20223540.0%0.6 pCi/L3.1 pCi/L22.8%Level
20213510.0%0.2 pCi/L2.9 pCi/L15.4%−0.6 points
20201740.6%0.4 pCi/L10.0 pCi/L23.2%−2.2 points
2019362.8%1.0 pCi/L9.1 pCi/L29.6%+1.7 points
20181891.1%0.7 pCi/L4.7 pCi/L23.5%+1.1 points
2017300.0%1.1 pCi/L2.7 pCi/L21.7%−8.3 points
2016128.3%1.4 pCi/L4.3 pCi/L24.3%+8.3 points
2015940.0%0.4 pCi/L2.2 pCi/L26.5%Level
2014110.0%1.3 pCi/L2.0 pCi/L25.7%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Volusia County, Geology

The ground under Volusia County

Predicted

USGS's geologic map puts all of Volusia County's mapped land in one class: low radon potential. 98.3% 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).

USGS's geologic areas under Volusia County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Gulf/Atlantic Lowland and Central Highlandsand, silt, clay, gravelLow698.3%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Volusia County beside the ground around it

Across Florida 7.1% of the land is rated moderate; none of Volusia County's is. Of the 7 counties that border it, 1 has more moderate-potential ground, Marion County the most at 31.4%.

Share of land by USGS radon potential: Volusia County, the 7 counties bordering it and Florida
AreaEPA zoneLow potentialModerate potentialHigh potential
Volusia CountyZone 398.3%NoneNone
Seminole CountyZone 3100%NoneNone
Orange CountyZone 3100%NoneNone
Flagler CountyZone 3100%NoneNone
Lake CountyZone 3100%NoneNone
Putnam CountyZone 3100%NoneNone
Brevard CountyZone 382.5%NoneNone
Marion CountyZone 268.6%31.4%None
Florida67 counties, pooled by land areaVaries89.7%7.1%None

The map rates the ground, not the air in any home.

Local help

Volusia County, Local resources

Radon testing and mitigation in Volusia County

Listed radon businesses with an address in Volusia County:

Listed radon professionals by town: New Smyrna Beach

What Florida's program says
Phone
850-245-4288
Email
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

Volusia County, Questions

Questions about radon in Volusia County

Are radon levels high in Volusia County?

In 2023, 1.2% of the radon tests reported to CDC for Volusia County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.6 pCi/L. Of 30 Florida counties with 30 or more tests for the same period, 20 reported a higher share; pooled, the state comes to 18.5%.

Which counties border Volusia County?

Volusia County borders 7 counties: Seminole County, Orange County, Flagler County, Lake County, Putnam County, Brevard County and Marion County.

Products

Volusia County, Products

Testing a home in Volusia County

In Volusia County, 1.2% of 163 tests reported to CDC in 2023 reached 4 pCi/L, against 18.5% 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 Volusia County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Volusia County homes, compared

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Volusia County, Bordering counties

Counties bordering Volusia County

Calculated by Radon411

Volusia County, Cities and towns

Cities and towns in Volusia County

Volusia County is growing: the Census Bureau puts it at 606,573 residents on July 1, 2025, up 9.1% from 555,791 in 2020. That works out to 551 people per square mile of land. No town dominates: Deltona, the largest, has 100,267 residents, 16.5% of the total. Reported testing is thin here: 163 tests over 2023, or 0.3 for every 1,000 residents (2025 estimate), where Florida as a whole comes to 0.7.

From Deltona to Pierson, CDC publishes no figure by town: each reads Volusia County's.

The 12 largest cities and towns in Volusia County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Deltona100,267+6.6%16.5%
Daytona Beach88,471+22.4%14.6%
Port Orange66,395+5.8%10.9%
DeLand46,346+21.3%7.6%
Ormond Beach44,692+3.6%7.4%
New Smyrna Beach33,182+9.0%5.5%
Edgewater24,795+7.1%4.1%
DeBary23,544+5.9%3.9%
Orange City15,309+19.8%2.5%
South Daytona13,894+7.1%2.3%
Holly Hill13,268+2.2%2.2%
Flagler Beachextends beyond Volusia County5,595+8.5%Counted whole
  • Daytona Beach Shores
  • Ponce Inlet
  • Lake Helen
  • Oak Hill
  • Pierson

17 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Volusia County is counted whole, so it has no share.

Volusia County, Homes

Homes in Volusia County

Of Volusia County's 277,851 homes, 65% are detached houses, against 55% across Florida; 18% are in buildings of five or more homes. Half of its homes were built before 1986, close to Florida's 1988: 11% date from before 1960 and 26% from 2000 or later. 73% of occupied homes are lived in by their owner (Florida: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Volusia County, Florida, 2019 to 2023
HomesVolusia CountyFlorida
Housing units277,85110,082,356
Detached houses65%55%
In buildings of 5 or more18%25%
Mobile homes8%8%
Built before 196011%10%
Built since 200026%30%
Middle year built19861988
Owner-occupied73%67%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.