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 Calcasieu Parish, Louisiana
EPA puts Calcasieu Parish in Zone 3, its lowest radon zone, and only 3 radon tests from it are on file with CDC (2022). 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
- Calcasieu Parish
- 0.0%
- Louisiana
- 0.8%
333 tests, 2020
Median result
0.2pCi/L
Below action level
- Calcasieu Parish
- 0.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2020
Tests reported
333
2nd of 13 by tests
- Calcasieu Parish
- 333
- 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
- Calcasieu Parish
- 0.0%
- Lafayette Parish
- 19.0%
By share, of 13 with 30+ tests
Read a result for Calcasieu Parish
Starts at Calcasieu 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. Calcasieu Parish's median reported result, 2020.
The data
Calcasieu Parish, At a glance
Calcasieu 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 Calcasieu Parish, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2015 | 0.0% |
| 2017 | 0.0% |
| 2018 | 0.0% |
| 2019 | 0.0% |
| 2020 | 0.0% |
| 2021 | 0.0% |
| 2022 | 0.0% |
2022: 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 Calcasieu Parish over 2022, 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: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).
Calcasieu Parish, Compared
Calcasieu Parish radon figures, compared
Calculated by Radon411Only 0 of 333 radon tests reported for Calcasieu Parish in 2020 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 1.1 pCi/L.
The newest figure, in 2022, counts only 3 tests (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 333-test figure.
Across 18 Louisiana counties pooled together, 0.8% of tests reached that level, so Calcasieu 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.
Below the action level, 333 tests (100.0%) came in under 2 pCi/L, against 94.9% statewide, and 0 tests (0.0%) fell between 2 and 4, against 4.2% statewide. Over 5 years of annual figures the share held within 2 points, from 0.0% in 2017 to 0.0% in 2021; its peak was 0.0% in 2017. USGS geology rates 100% of the county's land low radon potential.
The busiest year on file was 2020, with 333 tests reported; the quietest, 2022, had 3.
Calcasieu ParishLouisiana, pooled
| Year | Tests | Calcasieu Parish, at or above 4 pCi/L | Louisiana, pooled |
|---|---|---|---|
| 2017 | 153 | 0.0% | 2.6% |
| 2018 | 189 | 0.0% | 0.5% |
| 2019 | 123 | 0.0% | 2.0% |
| 2020 | 333 | 0.0% | 0.8% |
| 2021 | 216 | 0.0% | 3.9% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Calcasieu Parish, Geology
The ground under Calcasieu Parish
PredictedUSGS's geologic map puts all of Calcasieu Parish's mapped land in one class: low radon potential. The map puts 54.6% of Calcasieu Parish in the area it calls Terraces and Prairies and 45.3% 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 | 54.6% |
| Delta | Alluvium and marsh. | Low | 6 | 45.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Calcasieu Parish beside the ground around it
Neither Calcasieu Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 5 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Calcasieu Parish, Local resources
Radon testing and mitigation in Calcasieu 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
Calcasieu Parish, Questions
Questions about radon in Calcasieu Parish
Are radon levels high in Calcasieu Parish?
In 2022, 0.0% of the radon tests reported to CDC for Calcasieu Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.7 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 Calcasieu Parish?
Calcasieu Parish borders 5 counties: Beauregard Parish, LA, Cameron Parish, LA, Jefferson Davis Parish, LA, Orange County, TX and Newton County, TX.
Products
Calcasieu Parish, Products
Testing a home in Calcasieu Parish
In Calcasieu Parish, 0.0% of 333 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 Calcasieu 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
Monitor
Corentium Home battery digital radon detector
- C-NRPP 2024/25: Approved
- Battery
- Screen
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Calcasieu Parish, Bordering counties
Counties bordering Calcasieu Parish
Calculated by Radon411counties bordering Calcasieu Parish: 1 of 5
Calcasieu Parish, Cities and towns
Cities and towns in Calcasieu Parish
About 208,466 people live in Calcasieu Parish by the Census Bureau's estimate for July 1, 2025, 8,008 fewer than in 2020 (−3.7%). That works out to 196 people per square mile of land. Its largest town, Lake Charles, has 82,676 residents, 39.7% of the total. Together its 6 incorporated places hold 56.2% of those residents; the other 43.8% live outside any of them. Testing is reported here more often than across the state: CDC's 333 reported tests for 2020 come to 1.6 for every 1,000 residents (2025 estimate), against 0.4 for Louisiana.
From Lake Charles to DeQuincy, CDC publishes no figure by town: each reads Calcasieu Parish's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Lake Charles | 82,676 | −2.6% | 39.7% |
| Sulphur | 20,492 | −6.0% | 9.8% |
| Westlake | 4,763 | −3.8% | 2.3% |
| Iowa | 3,301 | −3.8% | 1.6% |
| Vinton | 3,115 | −8.3% | 1.5% |
| DeQuincy | 2,878 | −7.6% | 1.4% |
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).
Calcasieu Parish, Homes
Homes in Calcasieu Parish
Of Calcasieu Parish's 94,462 homes, 68% are detached houses, against 65% across Louisiana; 15% are mobile homes. Half of its homes were built before 1988, close to Louisiana's 1982: 18% date from before 1960 and 35% from 2000 or later. 72% 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 | Calcasieu Parish | Louisiana |
|---|---|---|
| Housing units | 94,462 | 2,094,002 |
| Detached houses | 68% | 65% |
| In buildings of 5 or more | 10% | 11% |
| Mobile homes | 15% | 13% |
| Built before 1960 | 18% | 19% |
| Built since 2000 | 35% | 27% |
| Middle year built | 1988 | 1982 |
| Owner-occupied | 72% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.