Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Jim Wells County, Texas
EPA puts Jim Wells 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
Highest bordering
0.0%
Nueces County
- Nueces
- 0.0%
1 of 6 neighbours have 30+ tests, 2007 to 2016
Nearest county
0.0%
Nueces County, 29 miles
- Nueces
- 0.0%
- Texas
- 10.4%
Share at 4+ pCi/L, 45 tests, 2007 to 2016
Ground above low
None
27.3 pts below Texas
- Jim Wells
- 0.0%
- Texas
- 27.3%
Share of land USGS rates moderate or high potential
Tests reported
1
Too few for a share
- Jim Wells
- 1
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Jim Wells County
Starts at EPA's action level
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
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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.
The data
Jim Wells County, At a glance
Jim Wells County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
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 Jim Wells County, 2008 to 2017, laboratory
CDC holds 1 reported test for Jim Wells 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). Jim Wells County beside the counties around it is how this page reads it.
What these figures count
Only 1 test was reported to CDC for Jim Wells 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: 2005 to 2017 (every CDC figure on file).
Jim Wells County, Compared
Jim Wells County radon figures, compared
Calculated by Radon411CDC's largest figure for Jim Wells 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.
Nueces County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L. Farther out, Bexar County (121 miles away) at 6.6%, Travis County (180 miles away) at 9.3% and Fort Bend County (187 miles away) at 3.4% have figures too. 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 Jim Wells 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.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Jim Wells County, Geology
The ground under Jim Wells County
PredictedUSGS's geologic map puts all of Jim Wells County's mapped land in one class: low radon potential. The map puts 76.9% of Jim Wells County in the area it calls South Texas Plain and 23.1% in Coastal Plain. USGS gives both a radon index of 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| South Texas Plain | Cretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite. | Low | 7 | 76.9% |
| Coastal Plain | Cretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite. | Low | 7 | 23.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Jim Wells County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Jim Wells County's is. None of the 6 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Jim Wells County, Local resources
Radon testing and mitigation in Jim Wells County
- Texas Radon GroupTexas Radon Group, run by Texas Tech University, does not license radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Texas.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
The Texas Radon Group offers free radon test kits for Texas individuals who qualify.
- Compare kits
- Professionals in Texas7 professionals are listed in Texas.
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
Jim Wells County, Questions
Questions about radon in Jim Wells County
Are radon levels high in Jim Wells County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Jim Wells County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Nueces County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L.
Which counties border Jim Wells County?
Jim Wells County borders 6 counties: Nueces County, Duval County, Kleberg County, San Patricio County, Live Oak County and Brooks County.
Products
Jim Wells County, Products
Testing a home in Jim Wells County
No CDC figure names Jim Wells County; the nearest county with one, Nueces County (29 miles away), reported 0.0% 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 Jim Wells 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
Monitor
EcoBlu plug-in digital radon monitor with a display
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Jim Wells County, Bordering counties
Counties bordering Jim Wells County
Calculated by Radon411- Radon levels in Nueces CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.6 pCi/L · 45 tests
- Radon levels in San Patricio CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 1 test
- Radon levels in Duval CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Kleberg CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Live Oak CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Brooks CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Jim Wells County, Cities and towns
Cities and towns in Jim Wells County
Jim Wells County's population has barely moved since 2020: 38,804 residents on July 1, 2025 against 38,888 then, by the Census Bureau's estimates. That works out to 45 people per square mile of land. Its largest town, Alice, has 17,550 residents, 45.2% of the total. Reported testing is thin here: 1 test over 2008 to 2017, or under 0.1 for every 1,000 residents (2025 estimate), where Texas as a whole comes to 0.1.
From Alice to Orange Grove, CDC publishes no figure by town: each reads Jim Wells County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Alice | 17,550 | −1.7% | 45.2% |
| San Diegoextends beyond Jim Wells County | 3,503 | −6.3% | Counted whole |
| Premont | 2,401 | −2.2% | 6.2% |
| Orange Grove | 1,178 | +0.8% | 3.0% |
4 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). A place that extends beyond Jim Wells County is counted whole, so it has no share.
Jim Wells County, Homes
Homes in Jim Wells County
Of Jim Wells County's 16,207 homes, 73% are detached houses, against 65% across Texas; 15% are mobile homes. The homes are older than Texas' as a whole: half were built before 1981 (1990 for Texas), and 20% date from before 1960. 67% 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 | Jim Wells County | Texas |
|---|---|---|
| Housing units | 16,207 | 11,890,808 |
| Detached houses | 73% | 65% |
| In buildings of 5 or more | 6% | 21% |
| Mobile homes | 15% | 7% |
| Built before 1960 | 20% | 13% |
| Built since 2000 | 24% | 37% |
| Middle year built | 1981 | 1990 |
| Owner-occupied | 67% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.