Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Jefferson Davis Parish, Louisiana
EPA puts Jefferson Davis Parish in Zone 3, its lowest radon zone, and only 3 radon tests from it are on file with CDC (2018). 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 7 neighbours have 30+ tests, 2006 to 2015
Nearest county
0.0%
Calcasieu Parish, 33 miles
- Calcasieu Parish
- 0.0%
- Louisiana
- 2.8%
Share at 4+ pCi/L, 59 tests, 2006 to 2015
Ground above low
None
Level with Louisiana
- Jefferson Davis Parish
- 0.0%
- Louisiana
- 0.0%
Share of land USGS rates moderate or high potential
Tests reported
3
Too few for a share
- Jefferson Davis Parish
- 3
- Needed
- 30
2018
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 Jefferson Davis Parish
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
Jefferson Davis Parish, At a glance
Jefferson Davis 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 Jefferson Davis Parish, 2018
CDC holds 3 reported tests for Jefferson Davis Parish in 2018, with a median of 5.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Jefferson Davis Parish beside the counties around it is how this page reads it.
What these figures count
Only 3 tests were reported to CDC for Jefferson Davis Parish over 2018, 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. Measured data period: 2018.
Jefferson Davis Parish, Compared
Jefferson Davis Parish radon figures, compared
Calculated by Radon411CDC's largest figure for Jefferson Davis Parish rests on 3 tests in 2018, 3 of them at or above 4 pCi/L, so each test moves its share by 33.3 points and no rank or comparison is drawn from it. Results reached as high as 5.9 pCi/L, with a middle value of 5.9 pCi/L.
Calcasieu Parish, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L. Farther out, East Baton Rouge Parish (104 miles away) at 0.0%, Tangipahoa Parish (146 miles away) at 0.0% and Jefferson Parish (164 miles away) at 1.5% have figures too. Pooled across 37 Louisiana counties, 2.8% of reported tests reached that level; across every county in the country with a figure, 36.3%.
Statewide for the same period, Jefferson Parish reported the highest share (1.5%) and Tangipahoa Parish the lowest (0.0%). EPA's 1993 map puts Jefferson Davis Parish 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.
Jefferson Davis Parish, Geology
The ground under Jefferson Davis Parish
PredictedUSGS's geologic map puts all of Jefferson Davis Parish's mapped land in one class: low radon potential. The map puts 66.9% of Jefferson Davis Parish in the area it calls Terraces and Prairies and 33.1% in Delta. USGS gives the first a radon index of 8 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 |
|---|---|---|---|---|
| Terraces and Prairies | Clay, sandy clay, silt, sand, and some gravel. | Low | 8 | 66.9% |
| Delta | Alluvium and marsh. | Low | 6 | 33.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Jefferson Davis Parish beside the ground around it
Neither Jefferson Davis Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 7 parishes that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Jefferson Davis Parish, Local resources
Radon testing and mitigation in Jefferson Davis 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
Jefferson Davis Parish, Questions
Questions about radon in Jefferson Davis Parish
Are radon levels high in Jefferson Davis Parish?
In 2018, 100.0% of the radon tests reported to CDC for Jefferson Davis Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.9 pCi/L. Calcasieu Parish, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L.
Which counties border Jefferson Davis Parish?
Jefferson Davis Parish borders 7 parishes: Acadia Parish, Allen Parish, Calcasieu Parish, Beauregard Parish, Evangeline Parish, Cameron Parish and Vermilion Parish.
Products
Jefferson Davis Parish, Products
Testing a home in Jefferson Davis Parish
No CDC figure names Jefferson Davis Parish; the nearest county with one, Calcasieu Parish (33 miles away), reported 0.0% of its tests at or above 4 pCi/L over the 2006 to 2015 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 Jefferson Davis 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
Monitor
Wave Radon battery smart radon monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- App only
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Best radon monitors for Jefferson Davis Parish homes, compared
Explore
Jefferson Davis Parish, Bordering parishes
Parishes bordering Jefferson Davis Parish
Calculated by Radon411- Radon levels in Acadia ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.7 pCi/L · 1 test
- Radon levels in Calcasieu ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 59 tests
- Radon levels in Evangeline ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.7 pCi/L · 2 tests
- Radon levels in Cameron ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 1 test
- Radon levels in Allen ParishEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Beauregard ParishEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Vermilion ParishEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Jefferson Davis Parish, Cities and towns
Cities and towns in Jefferson Davis Parish
About 31,471 people live in Jefferson Davis Parish by the Census Bureau's estimate for July 1, 2025, 766 fewer than in 2020 (−2.4%). That works out to 48 people per square mile of land. Its largest town, Jennings, has 9,235 residents, 29.3% of the total. Together its 5 incorporated places hold 51.7% of those residents; the other 48.3% live outside any of them. Reported testing is thin here: 3 tests over 2018, or 0.1 for every 1,000 residents (2025 estimate), where Louisiana as a whole comes to 0.5.
From Jennings to Fenton, CDC publishes no figure by town: each reads Jefferson Davis Parish's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Jennings | 9,235 | −5.8% | 29.3% |
| Welsh | 3,286 | −1.4% | 10.4% |
| Lake Arthur | 2,569 | −0.9% | 8.2% |
| Elton | 974 | −1.9% | 3.1% |
| Fenton | 217 | −6.5% | 0.7% |
5 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).
Jefferson Davis Parish, Homes
Homes in Jefferson Davis Parish
Of Jefferson Davis Parish's 14,107 homes, 73% are detached houses, against 65% across Louisiana; 20% are mobile homes. Half of its homes were built before 1981, close to Louisiana's 1982: 27% date from before 1960 and 24% 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 | Jefferson Davis Parish | Louisiana |
|---|---|---|
| Housing units | 14,107 | 2,094,002 |
| Detached houses | 73% | 65% |
| In buildings of 5 or more | 3% | 11% |
| Mobile homes | 20% | 13% |
| Built before 1960 | 27% | 19% |
| Built since 2000 | 24% | 27% |
| Middle year built | 1981 | 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.