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Radon Levels in Jackson County, Texas

EPA puts Jackson County in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2008 to 2017, laboratory totals). 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

  • Nearest county

    3.4%

    Fort Bend County, 63 miles

    Fort Bend
    3.4%
    Texas
    10.4%

    Share at 4+ pCi/L, 117 tests, 2007 to 2016

  • Ground above low

    None

    27.3 pts below Texas

    Jackson
    0.0%
    Texas
    27.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    1

    Too few for a share

    Jackson
    1
    Needed
    30

    2008 to 2017, laboratory

  • 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

Read a result for Jackson County

Starts at EPA's action level

4.0pCi/L

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

EPA’s reading of 4.0 pCi/L

At or above 4 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 at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.

Interpret this readingWhat a fix costs

The data

Jackson County, At a glance

Jackson County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Jackson 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 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Jackson County, 2008 to 2017, laboratory

CDC holds 1 reported test for Jackson County over the 2008 to 2017 laboratory totals, a result of 0.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Jackson County beside the counties around it is how this page reads it.

What these figures count

Only 1 test was reported to CDC for Jackson County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2007 to 2017 (every CDC figure on file).

How to read these figures

Jackson County, Compared

Jackson County radon figures, compared

Calculated by Radon411

CDC's largest figure for Jackson County rests on 1 test over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 100.0 points and no rank or comparison is drawn from it. Results reached as high as 0.1 pCi/L, with a middle value of 0.1 pCi/L.

The nearest counties with a figure are Fort Bend County (63 miles away) at 3.4%, Brazoria County (70 miles away) at 6.3% and Harris County (95 miles away) at 3.1%. Pooled across 140 Texas counties, 10.4% of reported tests reached that level; across every county in the country with a figure, 35.8%.

Statewide for the same period, Randall County reported the highest share (71.4%) and Nueces County the lowest (0.0%). EPA's 1993 map puts Jackson County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.

Texas, the United States and the counties around Jackson County, 2007 to 2016, laboratory
AreaTestsAt or above 4 pCi/LMedian
Texas, pooled140 counties, pooled4,54810.4%Not pooled
United States, pooled2,666 counties, pooled1,939,02535.8%Not pooled
Randall Countyhighest in the state8471.4%6.2 pCi/L
Nueces Countylowest in the state450.0%0.6 pCi/L
Matagorda County, TXborders it633.3%0.1 pCi/L
Lavaca County, TXborders it30.0%0.1 pCi/L
Victoria County, TXborders it50.0%0.6 pCi/L
Wharton County, TXborders it90.0%0.5 pCi/L
Colorado County, TXborders it10.0%1.5 pCi/L
The nearest Texas counties to Jackson County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Fort Bend County63 mi1173.4%0.2 pCi/L
Brazoria County70 mi326.3%0.3 pCi/L
Harris County95 mi7753.1%0.2 pCi/L
Galveston County102 mi830.0%0.2 pCi/L
Nueces County106 mi450.0%0.6 pCi/L
Montgomery County113 mi857.1%0.6 pCi/L
Brazos County119 mi490.0%0.2 pCi/L
Travis County120 mi4089.3%0.8 pCi/L
Jackson County ten-year laboratory totals, against Texas' pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestTexas, pooledChange from the row before
2008 to 201710.0%0.1 pCi/L0.1 pCi/L10.2%Level
2007 to 201610.0%0.1 pCi/L0.1 pCi/L10.4%First on file

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

Jackson County, Geology

The ground under Jackson County

Predicted

USGS's geologic map puts all of Jackson County's mapped land in one class: low radon potential. All of it lies in the area the map calls Coastal Plain, to which USGS gives a radon index of 7, in the low band (5 to 8).

USGS's geologic areas under Jackson County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Coastal PlainCretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite.Low7100%

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

Jackson County beside the ground around it

Across Texas 0.5% of the land is rated high; none of Jackson County's is. None of the 6 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Jackson County, the 6 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Jackson CountyZone 3100%NoneNone
Victoria CountyZone 3100%NoneNone
Wharton CountyZone 3100%NoneNone
Lavaca CountyZone 3100%NoneNone
Matagorda CountyZone 384.5%NoneNone
Calhoun CountyZone 375.2%NoneNone
Colorado CountyZone 3100%NoneNone
Texas254 counties, pooled by land areaVaries72.4%26.8%0.5%

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

Local help

Jackson County, Local resources

Radon testing and mitigation in Jackson County

What Texas's program says
Licensing of radon professionals
There are no radon certification requirements for the State of Texas at this time, but the National Radon Proficiency Program lists radon testers and mitigators within Texas that have passed a rigorous national certification program.

What it means

Jackson County, Questions

Questions about radon in Jackson County

Are radon levels high in Jackson County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Jackson County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Of the 8 nearest counties with a figure, within 120 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 9.3%.

Which counties border Jackson County?

Jackson County borders 6 counties: Victoria County, Wharton County, Lavaca County, Matagorda County, Calhoun County and Colorado County.

Products

Jackson County, Products

Testing a home in Jackson County

No CDC figure names Jackson County; the nearest county with one, Fort Bend County (63 miles away), reported 3.4% of its tests at or above 4 pCi/L over the 2007 to 2016 laboratory totals, the only reading nearby until a test of this home. 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 Jackson County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Jackson County homes, compared

Explore

Jackson County, Bordering counties

Counties bordering Jackson County

Calculated by Radon411

Jackson County, Cities and towns

Cities and towns in Jackson County

The Census Bureau estimates 15,393 residents in Jackson County for July 1, 2025, 396 more than in 2020 (+2.6%). That works out to 19 people per square mile of land. Its largest town, Edna, has 6,088 residents, 39.6% of the total. Together its 3 incorporated places hold 54.0% of those residents; the other 46.0% live outside any of them. Reported testing is thin here: 1 test over 2008 to 2017, or 0.1 for every 1,000 residents (2025 estimate), where Texas as a whole comes to 0.1.

From Edna to La Ward, CDC publishes no figure by town: each reads Jackson County's.

The cities and towns in Jackson County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Edna6,088+1.3%39.6%
Ganado2,009+1.9%13.1%
La Ward210+14.8%1.4%

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).

Jackson County, Homes

Homes in Jackson County

Of Jackson County's 7,021 homes, 74% are detached houses, against 65% across Texas; 15% are mobile homes. The homes are older than Texas' as a whole: half were built before 1976 (1990 for Texas), and 29% date from before 1960. 70% of occupied homes are lived in by their owner (Texas: 63%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Jackson County, Texas, 2019 to 2023
HomesJackson CountyTexas
Housing units7,02111,890,808
Detached houses74%65%
In buildings of 5 or more8%21%
Mobile homes15%7%
Built before 196029%13%
Built since 200020%37%
Middle year built19761990
Owner-occupied70%63%

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