Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Red River Parish, Louisiana
EPA puts Red River Parish in Zone 3, its lowest radon zone, and only 3 radon tests from it are on file with CDC (2021). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
0.0%
0.5 pts below LA
- Red River Parish
- 0.0%
- Louisiana
- 0.5%
102 tests, 2018
Median result
0.2pCi/L
Below action level
- Red River Parish
- 0.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2018
Tests reported
102
7th of 12 by tests
- Red River Parish
- 102
- Jefferson Parish
- 504
Reported to CDC before any fix, 2018
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Louisiana
2 of 12
Top quarter
- Red River Parish
- 0.0%
- Lafayette Parish
- 8.0%
By share, of 12 with 30+ tests
Read a result for Red River Parish
Starts at Red River Parish's median, 0.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.2 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Red River Parish's median reported result, 2018.
The data
Red River Parish, At a glance
Red River Parish 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 Red River Parish, 2021
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2018 | 0.0% |
| 2021 | 0.0% |
2021: 0.0%. Across these years the share ran from 0.0% to 0.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 3 tests were reported to CDC for Red River Parish over 2021, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the parish nor this house.
Measured: CDC tracking data. Figure above: 2021. Measured data period: 2005 to 2021 (every CDC figure on file).
Red River Parish, Compared
Red River Parish radon figures, compared
Calculated by Radon411Only 0 of 102 radon tests reported for Red River Parish in 2018 reached 4 pCi/L (0.0%). The median result, 0.2 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 0.6 pCi/L.
The newest figure, in 2021, counts only 3 tests (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 102-test figure.
Across 28 Louisiana counties pooled together, 0.5% of tests reached that level, so Red River Parish runs 0.5 points below its state. Against the national pool of 29.1%, the gap is 29.1 points lower. Its place in the state: 2nd of 12 Louisiana counties with 30 or more tests for the same period.
Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 0.0% share point the same way here. Of 2 neighbours with a figure, all 2 reported a larger share at or above 4 pCi/L; the spread is 0.0% (Caddo Parish) to 0.0% (De Soto Parish).
Below the action level, 102 tests (100.0%) came in under 2 pCi/L, against 97.2% statewide, and 0 tests (0.0%) fell between 2 and 4, against 2.3% statewide. USGS geology rates 100% of the county's land low radon potential.
The busiest year on file was 2018, with 102 tests reported; the quietest, 2021, had 3.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Red River Parish, Geology
The ground under Red River Parish
PredictedUSGS's geologic map puts all of Red River Parish's mapped land in one class: low radon potential. All of it lies in the area the map calls Old Uplands, to which USGS gives 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 |
|---|---|---|---|---|
| Old Uplands | Clays, silts, sands, and ironstone. | Low | 7 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Red River Parish beside the ground around it
Neither Red River Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 5 parishes that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Red River Parish, Local resources
Radon testing and mitigation in Red River Parish
- Louisiana's radon programLouisiana Department of Environmental QualityLouisiana's radon program answers questions about testing, mitigation and the rules in Louisiana.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- See the Louisiana directoryNo professionals are listed in Louisiana yet. The state program can point you to registered testers and mitigators.
What it means
Red River Parish, Questions
Questions about radon in Red River Parish
Are radon levels high in Red River Parish?
In 2021, 0.0% of the radon tests reported to CDC for Red River Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.6 pCi/L. Of 12 Louisiana counties with 30 or more tests for the same period, 1 reported a higher share; pooled, the state comes to 0.5%.
Which counties border Red River Parish?
Red River Parish borders 5 parishes: Bienville Parish, Natchitoches Parish, De Soto Parish, Bossier Parish and Caddo Parish.
Products
Red River Parish, Products
Testing a home in Red River Parish
In Red River Parish, 0.0% of 102 tests reported to CDC in 2018 reached 4 pCi/L, against 0.5% pooled across Louisiana. 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 Parish.
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-1011 rechargeable radon detector with a 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 Parish, Bordering parishes
Parishes bordering Red River Parish
Calculated by Radon411- Radon levels in Bossier ParishEPA zone 3
11.1%at or above 4 pCi/L
Median 0.5 pCi/L · 27 tests · 11.1 points above Red River Parish
- Radon levels in De Soto ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 84 tests · 0.0 points above Red River Parish
- Radon levels in Caddo ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 111 tests · 0.0 points above Red River Parish
- Radon levels in Bienville ParishEPA zone 3
No CDC figure for 2018; its page reads it against its own neighbours.
- Radon levels in Natchitoches ParishEPA zone 3
No CDC figure for 2018; its page reads it against its own neighbours.
Red River Parish, Cities and towns
Cities and towns in Red River Parish
Red River Parish has been losing residents: from 7,583 in 2020 to 7,165 on July 1, 2025, a fall of 5.5% by the Census Bureau's estimates. That works out to 18 people per square mile of land. Its largest town, Coushatta, has 1,623 residents, 22.7% of the total. Together its 4 incorporated places hold 35.7% of those residents; the other 64.3% live outside any of them. Testing is reported here more often than across the state: CDC's 102 reported tests for 2018 come to 14.2 for every 1,000 residents (2025 estimate), against 0.5 for Louisiana.
From Coushatta to Edgefield, CDC publishes no figure by town: each reads Red River Parish's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Coushatta | 1,623 | −7.0% | 22.7% |
| Martin | 494 | −5.4% | 6.9% |
| Hall Summit | 256 | −4.1% | 3.6% |
| Edgefield | 187 | −7.9% | 2.6% |
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).
Red River Parish, Homes
Homes in Red River Parish
Of Red River Parish's 3,599 homes, 57% are detached houses, against 65% across Louisiana; 36% are mobile homes. Half of its homes were built before 1980, close to Louisiana's 1982: 11% date from before 1960 and 30% from 2000 or later. Owners live in 77% of the occupied homes (Louisiana: 67%), so for most households a test and a fix are their own to order.
| Homes | Red River Parish | Louisiana |
|---|---|---|
| Housing units | 3,599 | 2,094,002 |
| Detached houses | 57% | 65% |
| In buildings of 5 or more | 3% | 11% |
| Mobile homes | 36% | 13% |
| Built before 1960 | 11% | 19% |
| Built since 2000 | 30% | 27% |
| Middle year built | 1980 | 1982 |
| Owner-occupied | 77% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.