Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Orange County, Texas
EPA puts Orange County in Zone 3, its lowest radon zone, and only 11 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
0.0%
Calcasieu Parish
- Calcasieu Parish
- 0.0%
1 of 6 neighbours have 30+ tests, 2007 to 2016
Nearest county
0.0%
Galveston County, 82 miles
- Galveston
- 0.0%
- Texas
- 10.4%
Share at 4+ pCi/L, 83 tests, 2007 to 2016
Ground above low
None
27.3 pts below Texas
- Orange
- 0.0%
- Texas
- 27.3%
Share of land USGS rates moderate or high potential
Tests reported
11
Too few for a share
- Orange
- 11
- 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 Orange 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
Orange County, At a glance
Orange 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 Orange County, 2008 to 2017, laboratory
CDC holds 11 reported tests for Orange County over the 2008 to 2017 laboratory totals, with a median of 0.8 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Orange County beside the counties around it is how this page reads it.
What these figures count
Only 11 tests were reported to CDC for Orange 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).
Orange County, Compared
Orange County radon figures, compared
Calculated by Radon411CDC's largest figure for Orange County rests on 11 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 9.1 points and no rank or comparison is drawn from it. Results reached as high as 1.9 pCi/L, with a middle value of 0.8 pCi/L.
Calcasieu Parish, LA, 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, Galveston County (82 miles away) at 0.0%, Harris County (92 miles away) at 3.1% and Montgomery County (97 miles away) at 7.1% 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 Orange 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.
Orange County, Geology
The ground under Orange County
PredictedUSGS's geologic map puts all of Orange County's mapped land in one class: low radon potential. The map puts 86.4% of Orange County in the area it calls Coastal Plain and 13.5% in Delta. USGS gives the first a radon index of 7 and the second 6, both in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Coastal Plain | Cretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite. | Low | 7 | 86.4% |
| Delta | Alluvium and marsh. | Low | 6 | 13.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Orange County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Orange 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
Orange County, Local resources
Radon testing and mitigation in Orange 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
Orange County, Questions
Questions about radon in Orange County
Are radon levels high in Orange County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Orange County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.8 pCi/L. Calcasieu Parish, LA, 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 Orange County?
Orange County borders 6 counties: Jefferson County, TX, Calcasieu Parish, LA, Hardin County, TX, Cameron Parish, LA, Newton County, TX and Jasper County, TX.
Products
Orange County, Products
Testing a home in Orange County
No CDC figure names Orange County; the nearest county with one, Galveston County (82 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 Orange County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
MonitorAEGTEST
HOUND-1085 palm-sized rechargeable radon detector
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Orange County, Bordering counties
Counties bordering Orange County
Calculated by Radon411- Radon levels in Jefferson County, TXEPA zone 3
4.8%at or above 4 pCi/L
Median 0.1 pCi/L · 21 tests
- Radon levels in Calcasieu Parish, LAEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 59 tests
- Radon levels in Hardin County, TXEPA zone 3
0.0%at or above 4 pCi/L
Median 0.7 pCi/L · 7 tests
- Radon levels in Cameron Parish, LAEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 1 test
- Radon levels in Jasper County, TXEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 2 tests
- Radon levels in Newton County, TXEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Orange County, Cities and towns
Cities and towns in Orange County
The Census Bureau estimates 86,266 residents in Orange County for July 1, 2025, 1,507 more than in 2020 (+1.8%). That works out to 258 people per square mile of land. Port Arthur, the largest place on its list (55,804 residents in all), extends beyond Orange County, so no share of the total is worked out for it. CDC's 11 reported tests for 2008 to 2017 work out to 0.1 per 1,000 residents (2025 estimate), close to Texas' 0.1.
From Port Arthur to Rose City, CDC publishes no figure by town: each reads Orange County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Port Arthurextends beyond Orange County | 55,804 | −0.4% | Counted whole |
| Orange | 19,419 | +0.8% | 22.5% |
| Bridge City | 9,645 | +2.4% | 11.2% |
| Vidor | 9,597 | −1.3% | 11.1% |
| West Orange | 3,391 | −1.7% | 3.9% |
| Pinehurst | 2,206 | −1.0% | 2.6% |
| Pine Forest | 504 | +0.8% | 0.6% |
| Rose City | 344 | +5.2% | 0.4% |
8 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 Orange County is counted whole, so it has no share.
Orange County, Homes
Homes in Orange County
Of Orange County's 37,681 homes, 69% are detached houses, against 65% across Texas; 18% are mobile homes. The homes are older than Texas' as a whole: half were built before 1982 (1990 for Texas), and 17% date from before 1960. Owners live in 75% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.
| Homes | Orange County | Texas |
|---|---|---|
| Housing units | 37,681 | 11,890,808 |
| Detached houses | 69% | 65% |
| In buildings of 5 or more | 8% | 21% |
| Mobile homes | 18% | 7% |
| Built before 1960 | 17% | 13% |
| Built since 2000 | 29% | 37% |
| Middle year built | 1982 | 1990 |
| Owner-occupied | 75% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.