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 Catahoula Parish, Louisiana
EPA puts Catahoula Parish in Zone 3, its lowest radon zone, and most reported tests there come back low, though 0.0% of 63 (2021) reached 4 pCi/L. 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%
3.9 pts below LA
- Catahoula Parish
- 0.0%
- Louisiana
- 3.9%
63 tests, 2021
Median result
0.2pCi/L
Below action level
- Catahoula Parish
- 0.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2021
Tests reported
63
12th of 14 by tests
- Catahoula Parish
- 63
- Ascension Parish
- 522
Reported to CDC before any fix, 2021
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
3 of 14
Top quarter
- Catahoula Parish
- 0.0%
- Caddo Parish
- 20.1%
By share, of 14 with 30+ tests
Read a result for Catahoula Parish
Starts at Catahoula 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. Catahoula Parish's median reported result, 2021.
The data
Catahoula Parish, At a glance
Catahoula 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 Catahoula Parish, 2021
Under 2 pCi/L: 100%2 to 4 pCi/L: 0%4 pCi/L and above: 0%
Of 63 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 63 | 100.0% |
| 2 to 4 pCi/L | 0 | 0.0% |
| 4 pCi/L and above | 0 | 0.0% |
What these figures count
These are the 63 tests reported to CDC for Catahoula Parish over 2021, many from homes being sold or already suspected of a problem: they describe the parish's reported tests, not this house.
Measured: CDC tracking data. Measured data period: 2021.
Catahoula Parish, Compared
Catahoula Parish radon figures, compared
Calculated by Radon411Only 0 of 63 radon tests reported for Catahoula Parish in 2021 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 0.2 pCi/L.
Across 21 Louisiana counties pooled together, 3.9% of tests reached that level, so Catahoula Parish runs 3.9 points below its state. Against the national pool of 24.4%, the gap is 24.4 points lower. Its place in the state: 3rd of 14 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. Avoyelles Parish, the one bordering county with a figure for the same period, reported 0.0%.
Below the action level, 63 tests (100.0%) came in under 2 pCi/L, against 92.3% statewide, and 0 tests (0.0%) fell between 2 and 4, against 3.8% statewide. 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.
Catahoula Parish, Geology
The ground under Catahoula Parish
PredictedUSGS's geologic map puts all of Catahoula Parish's mapped land in one class: low radon potential. All of it lies in the area the map calls Floodplain, 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 |
|---|---|---|---|---|
| Floodplain | Alluvium, marsh, silt, and clay. | 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.
Catahoula Parish beside the ground around it
Neither Catahoula Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 6 parishes that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Catahoula Parish, Local resources
Radon testing and mitigation in Catahoula 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
Catahoula Parish, Questions
Questions about radon in Catahoula Parish
Are radon levels high in Catahoula Parish?
In 2021, 0.0% of the radon tests reported to CDC for Catahoula Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.2 pCi/L. Of 14 Louisiana counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 3.9%.
Which counties border Catahoula Parish?
Catahoula Parish borders 6 parishes: LaSalle Parish, Concordia Parish, Avoyelles Parish, Caldwell Parish, Franklin Parish and Tensas Parish.
Products
Catahoula Parish, Products
Testing a home in Catahoula Parish
In Catahoula Parish, 0.0% of 63 tests reported to CDC in 2021 reached 4 pCi/L, against 3.9% 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 Catahoula Parish.
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
MonitorX-Sense
XR0B-SR battery digital radon monitor with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Catahoula Parish, Bordering parishes
Parishes bordering Catahoula Parish
Calculated by Radon411- Radon levels in Avoyelles ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 216 tests · 0.0 points above Catahoula Parish
- Radon levels in Caldwell ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 1.0 pCi/L · 3 tests · 0.0 points above Catahoula Parish
- Radon levels in LaSalle ParishEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in Concordia ParishEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in Franklin ParishEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in Tensas ParishEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
Catahoula Parish, Cities and towns
Cities and towns in Catahoula Parish
Catahoula Parish has been losing residents: from 8,846 in 2020 to 8,223 on July 1, 2025, a fall of 7.0% by the Census Bureau's estimates. That works out to 12 people per square mile of land. No town dominates: Jonesville, the largest, has 1,531 residents, 18.6% of the total. Together its 3 incorporated places hold 25.8% of those residents; the other 74.2% live outside any of them. Testing is reported here more often than across the state: CDC's 63 reported tests for 2021 come to 7.7 for every 1,000 residents (2025 estimate), against 0.7 for Louisiana.
From Jonesville to Harrisonburg, CDC publishes no figure by town: each reads Catahoula Parish's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Jonesville | 1,531 | −10.8% | 18.6% |
| Sicily Island | 330 | −9.6% | 4.0% |
| Harrisonburg | 261 | −7.4% | 3.2% |
3 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).
Catahoula Parish, Homes
Homes in Catahoula Parish
Of Catahoula Parish's 4,447 homes, 56% are detached houses, against 65% across Louisiana; 36% are mobile homes. Half of its homes were built before 1979, close to Louisiana's 1982: 16% date from before 1960 and 20% from 2000 or later. Owners live in 76% of the occupied homes (Louisiana: 67%), so for most households a test and a fix are their own to order.
| Homes | Catahoula Parish | Louisiana |
|---|---|---|
| Housing units | 4,447 | 2,094,002 |
| Detached houses | 56% | 65% |
| In buildings of 5 or more | 5% | 11% |
| Mobile homes | 36% | 13% |
| Built before 1960 | 16% | 19% |
| Built since 2000 | 20% | 27% |
| Middle year built | 1979 | 1982 |
| Owner-occupied | 76% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.