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Radon Levels in Martinsville city, Virginia

EPA puts Martinsville city in Zone 3, its lowest radon zone, and 27.3% of its 33 reported radon tests (2008 to 2017, laboratory totals) 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

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  • Share at 4+ pCi/L

    27.3%

    3.1 pts below VA

    Martinsville city
    27.3%
    Virginia
    30.4%

    33 tests, 2008 to 2017

  • Median result

    1.8pCi/L

    Below action level

    Martinsville city
    1.8 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    33

    82nd of 84 by tests

    Martinsville city
    33
    Fairfax
    8,657

    Reported to CDC before any fix, 2008 to 2017

  • 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 Virginia

    60 of 84

    Middle half

    Martinsville city
    27.3%
    Russell
    67.3%

    By share, of 84 with 30+ tests

Read a result for Martinsville city

Starts at Martinsville city's median, 1.8 pCi/L

1.8pCi/L

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

EPA’s reading of 1.8 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. Martinsville city's median reported result, 2008 to 2017.

Interpret this reading

The data

Martinsville city, At a glance

Martinsville city at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Martinsville city 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: High across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Martinsville city, 2008 to 2017, laboratory

Reported results by concentration band, Martinsville city, 2008 to 2017, laboratory
Under 2 pCi/L: 52%2 to 4 pCi/L: 21%4 pCi/L and above: 27%

Of 33 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Martinsville city, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L1751.5%
2 to 4 pCi/L721.2%
4 pCi/L and above927.3%
What these figures count

These are the 33 tests reported to CDC for Martinsville city over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Martinsville city, Compared

Martinsville city radon figures, compared

Calculated by Radon411

Martinsville city's 33 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.8 pCi/L and a maximum of 9.8 pCi/L, and 27.3% reached 4 pCi/L. Virginia as a whole (131 Virginia counties, pooled) comes to 30.4%: 3.1 points higher than here.

Among its state's counties it ranks 60th of 84 Virginia counties with 30 or more tests for the same period. Statewide for the same period, Russell County reported the highest share (67.3%) and Norfolk city the lowest (2.7%).

Below the action level, 17 tests (51.5%) came in under 2 pCi/L, against 44.7% statewide, and 7 tests (21.2%) fell between 2 and 4, against 24.9% statewide. CDC's ten-year totals for Martinsville city went from 55 tests (2005 to 2014) to 33 (2008 to 2017), the share going from 16.4% to 27.3%.

EPA's 1993 zone map puts Martinsville city in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land high radon potential.

Henry County, the one bordering county with a figure for the same period, reported 35.7%.

Martinsville city against Virginia, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Martinsville city
Martinsville city3327.3%1.8 pCi/LThis county
Virginia, pooled131 counties, pooled53,19930.4%Not pooled+3.1 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+8.4 points
Russell Countyhighest in the state4967.3%6.7 pCi/L+40.0 points
Norfolk citylowest in the state732.7%0.5 pCi/L−24.6 points
Henry County, VAborders it11535.7%2.7 pCi/L+8.4 points
Where Martinsville city's reported results fell, 2008 to 2017, laboratory, beside Virginia and the United States
ResultMartinsville city testsMartinsville city shareVirginia shareU.S. shareAgainst Virginia
Under 2 pCi/L1751.5%44.7%39.6%+6.8 points
2 to 4 pCi/L721.2%24.9%24.7%−3.7 points
4 pCi/L and above927.3%30.4%35.7%−3.1 points
Martinsville city ranked among the 84 Virginia counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Wise County55 of 845328.3%1.3 pCi/L
Fluvanna County56 of 8438828.1%2.5 pCi/L
Powhatan County57 of 845028.0%1.7 pCi/L
Richmond city58 of 8452027.7%2.1 pCi/L
Loudoun County59 of 844,45727.4%1.8 pCi/L
Martinsville city60 of 843327.3%1.8 pCi/L
Henrico County61 of 8460727.0%2.1 pCi/L
Fredericksburg city62 of 8437526.1%2.3 pCi/L
Roanoke city63 of 841,01025.9%2.3 pCi/L
Lynchburg city64 of 8475325.9%2.2 pCi/L
Albemarle County65 of 842,17924.7%2.1 pCi/L
Martinsville city ten-year laboratory totals, against Virginia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestVirginia, pooledChange from the row before
2008 to 20173327.3%1.8 pCi/L9.8 pCi/L30.4%+4.0 points
2007 to 20164323.3%1.7 pCi/L9.8 pCi/L30.6%+1.3 points
2006 to 20154122.0%1.8 pCi/L9.8 pCi/L30.7%+5.6 points
2005 to 20145516.4%1.4 pCi/L9.8 pCi/L30.3%First on file

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

Martinsville city, Geology

The ground under Martinsville city

Predicted

USGS's geologic map puts all of Martinsville city's mapped land in one class: high radon potential. All of it lies in the area the map calls Inner Piedmont, to which USGS gives a radon index of 12, in the high band (12 to 17).

USGS's geologic areas under Martinsville city
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Inner PiedmontGranite, pegmatites, granitic gneiss, schist and gneiss, slate, and phyllite.High12100%

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

Martinsville city beside the ground around it

Martinsville city has more high-potential ground than Virginia as a whole: 100% of its land against 47.9%. Of the one county that borders it, none has as large a share of high-potential ground; Henry County comes nearest at 97.9%.

Share of land by USGS radon potential: Martinsville city, the county bordering it and Virginia
AreaEPA zoneLow potentialModerate potentialHigh potential
Martinsville cityZone 3NoneNone100%
Henry CountyZone 1None2.1%97.9%
Virginia133 counties, pooled by land areaVaries20.6%30.0%47.9%

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

Local help

Martinsville city, Local resources

Radon testing and mitigation in Martinsville city

What Virginia's program says
Phone
(804) 864-8161
Email
Radon@vdh.virginia.gov
Licensing of radon professionals
The Code of Virginia requires that Radon testers and mitigators be currently certified by either the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB).

What it means

Martinsville city, Questions

Questions about radon in Martinsville city

Are radon levels high in Martinsville city?

Over the 2008 to 2017 laboratory totals, 27.3% of the radon tests reported to CDC for Martinsville city, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.8 pCi/L. Of 84 Virginia counties with 30 or more tests for the same period, 59 reported a higher share; pooled, the state comes to 30.4%.

Which counties border Martinsville city?

Martinsville city borders 1 county: Henry County.

Products

Martinsville city, Products

Testing a home in Martinsville city

In Martinsville city, 27.3% of 33 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 30.4% pooled across Virginia. 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 Martinsville city.

Test kits and monitors3

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Best radon monitors for Martinsville city homes, compared

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Martinsville city, Bordering counties

Counties bordering Martinsville city

Calculated by Radon411

Martinsville city, Cities and towns

Cities and towns in Martinsville city

The Census Bureau estimates 13,849 residents in Martinsville city for July 1, 2025, 371 more than in 2020 (+2.8%). Packed into its land, that is 1,264 people per square mile. Martinsville, its one incorporated place, has 13,849 residents, 100.0% of the total. Reported testing is thin here: 33 tests over 2008 to 2017, or 2.4 for every 1,000 residents (2025 estimate), where Virginia as a whole comes to 6.0.

Martinsville is the one incorporated place here; CDC publishes no figure by town, so it reads Martinsville city's.

Martinsville, Martinsville city: residents on July 1, 2025
PlaceResidentsSince 2020Share of residents
Martinsville13,849+2.8%100.0%

One incorporated place, 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).

Martinsville city, Homes

Homes in Martinsville city

Of Martinsville city's 7,031 homes, 73% are detached houses, against 61% across Virginia; 15% are in buildings of five or more homes. The homes are older than Virginia's as a whole: half were built before 1959 (1984 for Virginia), and 53% date from before 1960. 57% of occupied homes are lived in by their owner (Virginia: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Martinsville city, Virginia, 2019 to 2023
HomesMartinsville cityVirginia
Housing units7,0313,654,784
Detached houses73%61%
In buildings of 5 or more15%19%
Mobile homes1%4%
Built before 196053%19%
Built since 20005%25%
Middle year built19591984
Owner-occupied57%67%

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