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 Vernon Parish, Louisiana
EPA puts Vernon 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%
0.8 pts below LA
- Vernon Parish
- 0.0%
- Louisiana
- 0.8%
72 tests, 2020
Median result
0.5pCi/L
Below action level
- Vernon Parish
- 0.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2020
Tests reported
72
8th of 13 by tests
- Vernon Parish
- 72
- Jefferson Parish
- 339
Reported to CDC before any fix, 2020
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 13
Top quarter
- Vernon Parish
- 0.0%
- Lafayette Parish
- 19.0%
By share, of 13 with 30+ tests
Read a result for Vernon Parish
Starts at Vernon Parish's median, 0.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.5 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. Vernon Parish's median reported result, 2020.
The data
Vernon Parish, At a glance
Vernon 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 Vernon Parish, 2021
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2017 | 0.0% |
| 2020 | 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 Vernon 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: 2017 to 2021 (every CDC figure on file).
Vernon Parish, Compared
Vernon Parish radon figures, compared
Calculated by Radon411Only 0 of 72 radon tests reported for Vernon Parish in 2020 reached 4 pCi/L (0.0%). The median result, 0.5 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 2.2 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 72-test figure.
Across 18 Louisiana counties pooled together, 0.8% of tests reached that level, so Vernon Parish runs 0.8 points below its state. Against the national pool of 25.5%, the gap is 25.5 points lower. Its place in the state: 3rd of 13 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. Rapides Parish, the one bordering county with a figure for the same period, reported 0.0%.
Below the action level, 66 tests (91.7%) came in under 2 pCi/L, against 94.9% statewide, and 6 tests (8.3%) fell between 2 and 4, against 4.2% statewide. USGS geology rates 100% of the county's land low radon potential.
The busiest year on file was 2020, with 72 tests reported; the quietest, 2021, had 3.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Vernon Parish, Geology
The ground under Vernon Parish
PredictedUSGS's geologic map puts all of Vernon Parish's mapped land in one class: low radon potential. All of it lies in the area the map calls Terraces and Prairies, to which USGS gives a radon index of 8, 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 | 99.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Vernon Parish beside the ground around it
Neither Vernon Parish nor Louisiana as a whole has any land USGS rates above low potential. 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
Vernon Parish, Local resources
Radon testing and mitigation in Vernon 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
Vernon Parish, Questions
Questions about radon in Vernon Parish
Are radon levels high in Vernon Parish?
In 2021, 0.0% of the radon tests reported to CDC for Vernon Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.4 pCi/L. Of 13 Louisiana counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 0.8%.
Which counties border Vernon Parish?
Vernon Parish borders 6 counties: Sabine Parish, LA, Beauregard Parish, LA, Allen Parish, LA, Rapides Parish, LA, Natchitoches Parish, LA and Newton County, TX.
Products
Vernon Parish, Products
Testing a home in Vernon Parish
In Vernon Parish, 0.0% of 72 tests reported to CDC in 2020 reached 4 pCi/L, against 0.8% 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 Vernon 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
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
Vernon Parish, Bordering counties
Counties bordering Vernon Parish
Calculated by Radon411- Radon levels in Rapides Parish, LAEPA zone 3
0.0%at or above 4 pCi/L
Median 0.7 pCi/L · 48 tests · 0.0 points above Vernon Parish
- Radon levels in Sabine Parish, LAEPA zone 3
No CDC figure for 2020; its page reads it against its own neighbours.
- Radon levels in Beauregard Parish, LAEPA zone 3
No CDC figure for 2020; its page reads it against its own neighbours.
- Radon levels in Allen Parish, LAEPA zone 3
No CDC figure for 2020; its page reads it against its own neighbours.
- Radon levels in Natchitoches Parish, LAEPA zone 3
No CDC figure for 2020; its page reads it against its own neighbours.
- Radon levels in Newton County, TXEPA zone 3
No CDC figure for 2020; its page reads it against its own neighbours.
Vernon Parish, Cities and towns
Cities and towns in Vernon Parish
Vernon Parish has been losing residents: from 48,632 in 2020 to 45,091 on July 1, 2025, a fall of 7.3% by the Census Bureau's estimates. That works out to 34 people per square mile of land. DeRidder, the largest place on its list (9,503 residents in all), extends beyond Vernon Parish, so no share of the total is worked out for it. Testing is reported here more often than across the state: CDC's 72 reported tests for 2020 come to 1.6 for every 1,000 residents (2025 estimate), against 0.4 for Louisiana.
From DeRidder to Hornbeck, CDC publishes no figure by town: each reads Vernon Parish's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| DeRidderextends beyond Vernon Parish | 9,503 | −3.9% | Counted whole |
| Leesville | 5,210 | −7.7% | 11.6% |
| New Llano | 2,015 | −8.8% | 4.5% |
| Rosepine | 1,454 | −6.9% | 3.2% |
| Anacoco | 788 | −7.4% | 1.7% |
| Simpson | 542 | −6.9% | 1.2% |
| Hornbeck | 398 | −6.1% | 0.9% |
7 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 Vernon Parish is counted whole, so it has no share.
Vernon Parish, Homes
Homes in Vernon Parish
Mobile homes are 24% of Vernon Parish's 22,073 homes and detached houses 50%, against 65% across Louisiana. Half of its homes were built before 1988, close to Louisiana's 1982: 11% date from before 1960 and 31% from 2000 or later. 56% of occupied homes are lived in by their owner (Louisiana: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Vernon Parish | Louisiana |
|---|---|---|
| Housing units | 22,073 | 2,094,002 |
| Detached houses | 50% | 65% |
| In buildings of 5 or more | 6% | 11% |
| Mobile homes | 24% | 13% |
| Built before 1960 | 11% | 19% |
| Built since 2000 | 31% | 27% |
| Middle year built | 1988 | 1982 |
| Owner-occupied | 56% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.