Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Hunt County, Texas
EPA puts Hunt County in Zone 3, its lowest radon zone, and only 4 radon tests from it are 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
7.7%
Collin County
- Collin
- 7.7%
1 of 8 neighbours have 30+ tests, 2007 to 2016
Nearest county
7.7%
Collin County, 29 miles
- Collin
- 7.7%
- Texas
- 10.4%
Share at 4+ pCi/L, 284 tests, 2007 to 2016
Ground above low
None
27.3 pts below Texas
- Hunt
- 0.0%
- Texas
- 27.3%
Share of land USGS rates moderate or high potential
Tests reported
5
Too few for a share
- Hunt
- 5
- Needed
- 30
2005 to 2014, 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 Hunt 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
Hunt County, At a glance
Hunt 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 Hunt County, 2008 to 2017, laboratory
CDC holds 4 reported tests for Hunt County over the 2008 to 2017 laboratory totals, with a median of 2.0 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Hunt County beside the counties around it is how this page reads it.
What these figures count
Only 4 tests were reported to CDC for Hunt 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).
Hunt County, Compared
Hunt County radon figures, compared
Calculated by Radon411CDC's largest figure for Hunt County rests on 5 tests over the 2005 to 2014 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 20.0 points and no rank or comparison is drawn from it. Results reached as high as 9.4 pCi/L, with a middle value of 1.6 pCi/L.
Collin County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 7.7% of its tests at or above 4 pCi/L. Farther out, Dallas County (47 miles away) at 8.7%, Denton County (60 miles away) at 7.2% and Smith County (70 miles away) at 9.1% 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 Hunt 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.
Hunt County, Geology
The ground under Hunt County
PredictedUSGS's geologic map puts all of Hunt County's mapped land in one class: low radon potential. All of it lies in the area the map calls East Texas Province, to which USGS gives 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 |
|---|---|---|---|---|
| East Texas Province | Cretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite. | Low | 6 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Hunt County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Hunt County's is. Of the 8 counties that border it, 2 have more moderate-potential ground, Fannin County the most at 82.5%.
The map rates the ground, not the air in any home.
Local help
Hunt County, Local resources
Radon testing and mitigation in Hunt 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
Hunt County, Questions
Questions about radon in Hunt County
Are radon levels high in Hunt County?
Over the 2008 to 2017 laboratory totals, 25.0% of the radon tests reported to CDC for Hunt County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.0 pCi/L. Collin County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 7.7% of its tests at or above 4 pCi/L.
Which counties border Hunt County?
Hunt County borders 8 counties: Rockwall County, Rains County, Delta County, Collin County, Hopkins County, Kaufman County, Fannin County and Van Zandt County.
Products
Hunt County, Products
Testing a home in Hunt County
No CDC figure names Hunt County; the nearest county with one, Collin County (29 miles away), reported 7.7% 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 Hunt 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-1011S rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Hunt County, Bordering counties
Counties bordering Hunt County
Calculated by Radon411- Radon levels in Hopkins CountyEPA zone 3
100.0%at or above 4 pCi/L
Median 5.0 pCi/L · 1 test
- Radon levels in Rockwall CountyEPA zone 3
18.8%at or above 4 pCi/L
Median 1.2 pCi/L · 16 tests
- Radon levels in Collin CountyEPA zone 3
7.7%at or above 4 pCi/L
Median 1.0 pCi/L · 284 tests
- Radon levels in Kaufman CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.3 pCi/L · 4 tests
- Radon levels in Fannin CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 1 test
- Radon levels in Van Zandt CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 6 tests
- Radon levels in Rains CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Delta CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Hunt County, Cities and towns
Cities and towns in Hunt County
Hunt County is growing: the Census Bureau puts it at 123,336 residents on July 1, 2025, up 23.0% from 100,260 in 2020. That works out to 147 people per square mile of land. Its largest town, Greenville, has 37,069 residents, 30.1% of the total. Reported testing is thin here: 5 tests over 2005 to 2014, or under 0.1 for every 1,000 residents (2025 estimate), where Texas as a whole comes to 0.1.
From Greenville to Neylandville, CDC publishes no figure by town: each reads Hunt County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Greenville | 37,069 | +31.2% | 30.1% |
| Royse Cityextends beyond Hunt County | 28,307 | +105.4% | Counted whole |
| Josephineextends beyond Hunt County | 10,208 | +347.1% | Counted whole |
| Commerce | 9,928 | +9.3% | 8.0% |
| Caddo Mills | 5,715 | +282.8% | 4.6% |
| West Tawakoni | 2,261 | +19.2% | 1.8% |
| Quinlan | 1,601 | +14.3% | 1.3% |
| Wolfe City | 1,503 | +7.4% | 1.2% |
| Celeste | 925 | +13.9% | 0.7% |
| Lone Oak | 817 | +26.3% | 0.7% |
| Campbell | 613 | +13.3% | 0.5% |
| Union Valley | 544 | +43.2% | 0.4% |
- Hawk Cove
- Neylandville
14 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 Hunt County is counted whole, so it has no share.
Hunt County, Homes
Homes in Hunt County
Of Hunt County's 41,973 homes, 68% are detached houses, against 65% across Texas; 17% are mobile homes. Half of its homes were built before 1988, close to Texas' 1990: 11% date from before 1960 and 33% from 2000 or later. 71% 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 | Hunt County | Texas |
|---|---|---|
| Housing units | 41,973 | 11,890,808 |
| Detached houses | 68% | 65% |
| In buildings of 5 or more | 10% | 21% |
| Mobile homes | 17% | 7% |
| Built before 1960 | 11% | 13% |
| Built since 2000 | 33% | 37% |
| Middle year built | 1988 | 1990 |
| Owner-occupied | 71% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.