Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Red River County, Texas
EPA puts Red River County in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Nearest county
9.1%
Smith County, 87 miles
- Smith
- 9.1%
- Texas
- 10.4%
Share at 4+ pCi/L, 33 tests, 2007 to 2016
Ground above low
20.6%
6.7 pts below Texas
- Red River
- 20.6%
- Texas
- 27.3%
Share of land USGS rates moderate or high potential
Tests reported
0
None published
A home here needs its own test
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 Red River 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
Red River County, At a glance
Red River County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 79% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
No CDC test figures here
CDC has published no radon test figures for Red River County. Smith County, 87 miles away, is the nearest county with a figure over the 2007 to 2016 laboratory totals.
Red River County, Compared
Red River County radon figures, compared
Calculated by Radon411Red River County has no radon test figure of its own from CDC, whose counts over the 2007 to 2016 laboratory totals name 140 other Texas counties and leave it out. Pooled across 140 Texas counties, 10.4% of reported tests reached that level; across every county in the country with a figure, 35.8%.
The nearest counties with a figure are Smith County (87 miles away) at 9.1%, Collin County (93 miles away) at 7.7% and Dallas County (116 miles away) at 8.7%. 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 Red River County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 79% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Red River County, Geology
The ground under Red River County
PredictedMost of the ground under Red River County is one class on USGS's geologic map: 79.4% of its land is low radon potential, with 20.6% moderate. The map puts 78.9% of Red River County in the area it calls East Texas Province and 20.6% in Cretaceous Gulfian series. USGS gives the first a radon index of 6, in the low band (5 to 8), and the second 10, in the moderate band (9 to 11).
| 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 | 78.9% |
| Cretaceous Gulfian series | Cretaceous sandstone, shale, limestone, siltstone. | Moderate | 10 | 20.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Red River County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Red River County's is. Of the 8 counties that border it, 2 have more moderate-potential ground, Lamar County the most at 72.8%.
The map rates the ground, not the air in any home.
Local help
Red River County, Local resources
Radon testing and mitigation in Red River 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
Red River County, Questions
Questions about radon in Red River County
Are radon levels high in Red River County?
No CDC testing statistics are published here for Red River County, Texas yet. Of the 8 nearest counties with a figure, within 228 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 17.1%.
Which counties border Red River County?
Red River County borders 8 counties: Titus County, TX, Franklin County, TX, Lamar County, TX, Morris County, TX, McCurtain County, OK, Bowie County, TX, Delta County, TX and Choctaw County, OK.
Products
Red River County, Products
Testing a home in Red River County
No CDC figure names Red River County; the nearest county with one, Smith County (87 miles away), reported 9.1% 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 Red River 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
MonitorForensics Detectors
FD-65-RADON rechargeable radon detector with a color screen
- 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
Red River County, Bordering counties
Counties bordering Red River County
Calculated by Radon411- Radon levels in Choctaw County, OKEPA zone 3
100.0%at or above 4 pCi/L
Median 4.8 pCi/L · 2 tests
- Radon levels in Titus County, TXEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 1 test
- Radon levels in Lamar County, TXEPA zone 3
0.0%at or above 4 pCi/L
Median 0.3 pCi/L · 6 tests
- Radon levels in Morris County, TXEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 3 tests
- Radon levels in Franklin County, TXEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in McCurtain County, OKEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Bowie County, TXEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Delta County, TXEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Red River County, Cities and towns
Cities and towns in Red River County
The Census Bureau estimates 11,816 residents in Red River County for July 1, 2025, 252 more than in 2020 (+2.2%). That works out to 11 people per square mile of land. Its largest town, Clarksville, has 2,908 residents, 24.6% of the total. CDC publishes no radon test count for Red River County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).
From Clarksville to Annona, CDC publishes no figure by town: each reads Red River County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Clarksville | 2,908 | +2.3% | 24.6% |
| Bogata | 1,118 | +3.4% | 9.5% |
| Detroit | 713 | +1.3% | 6.0% |
| Deportextends beyond Red River County | 552 | Level | Counted whole |
| Avery | 432 | +3.6% | 3.7% |
| Annona | 185 | +0.5% | 1.6% |
6 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 Red River County is counted whole, so it has no share.
Red River County, Homes
Homes in Red River County
Red River County is a place of houses on their own lots: 75% of its 6,186 homes are detached single-family houses, against 65% across Texas. The homes are older than Texas' as a whole: half were built before 1981 (1990 for Texas), and 18% 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 | Red River County | Texas |
|---|---|---|
| Housing units | 6,186 | 11,890,808 |
| Detached houses | 75% | 65% |
| In buildings of 5 or more | 4% | 21% |
| Mobile homes | 15% | 7% |
| Built before 1960 | 18% | 13% |
| Built since 2000 | 21% | 37% |
| Middle year built | 1981 | 1990 |
| Owner-occupied | 70% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.