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 St. Bernard Parish, Louisiana
EPA puts St. Bernard 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
Nearest county
1.5%
Jefferson Parish, 35 miles
- Jefferson Parish
- 1.5%
- Louisiana
- 2.8%
Share at 4+ pCi/L, 67 tests, 2006 to 2015
Ground above low
None
Level with Louisiana
- St. Bernard Parish
- 0.0%
- Louisiana
- 0.0%
Share of land USGS rates moderate or high potential
Tests reported
3
Too few for a share
- St. Bernard 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 St. Bernard 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
St. Bernard Parish, At a glance
St. Bernard Parish at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 62% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for St. Bernard Parish, 2018
CDC holds 3 reported tests for St. Bernard Parish in 2018, with a median of 0.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). St. Bernard Parish beside the counties around it is how this page reads it.
What these figures count
Only 3 tests were reported to CDC for St. Bernard 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.
St. Bernard Parish, Compared
St. Bernard Parish radon figures, compared
Calculated by Radon411CDC's largest figure for St. Bernard Parish rests on 3 tests in 2018, 0 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 0.9 pCi/L, with a middle value of 0.9 pCi/L.
The nearest counties with a figure are Jefferson Parish (35 miles away) at 1.5%, Tangipahoa Parish (73 miles away) at 0.0% and East Baton Rouge Parish (103 miles away) at 0.0%. 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 St. Bernard Parish in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 62% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
St. Bernard Parish, Geology
The ground under St. Bernard Parish
PredictedUSGS's geologic map puts all of St. Bernard Parish's mapped land in one class: low radon potential. 62.2% of it lies in the area the map calls Delta, to which USGS gives a radon index of 6, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Delta | Alluvium and marsh. | Low | 6 | 62.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
St. Bernard Parish beside the ground around it
Neither St. Bernard Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 2 parishes that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
St. Bernard Parish, Local resources
Radon testing and mitigation in St. Bernard 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
St. Bernard Parish, Questions
Questions about radon in St. Bernard Parish
Are radon levels high in St. Bernard Parish?
In 2018, 0.0% of the radon tests reported to CDC for St. Bernard Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.9 pCi/L. Of the 4 nearest counties with a figure, within 229 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 1.5%.
Which counties border St. Bernard Parish?
St. Bernard Parish borders 2 parishes: Orleans Parish and Plaquemines Parish.
Products
St. Bernard Parish, Products
Testing a home in St. Bernard Parish
No CDC figure names St. Bernard Parish; the nearest county with one, Jefferson Parish (35 miles away), reported 1.5% 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 St. Bernard 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
Corentium Home 2 battery digital radon monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Screen, app
Method: Alpha spectrometry
Readings: Every 60 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
St. Bernard Parish, Bordering parishes
Parishes bordering St. Bernard Parish
Calculated by Radon411- Radon levels in Orleans ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 27 tests
- Radon levels in Plaquemines ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.5 pCi/L · 2 tests
St. Bernard Parish, Residents
Who lives in St. Bernard Parish
The Census Bureau estimates 45,642 residents in St. Bernard Parish for July 1, 2025, 1,784 more than in 2020 (+4.1%). That works out to 121 people per square mile of land. 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.
Census lists no incorporated place in St. Bernard Parish: every home in it reads the county's figures.
Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).
St. Bernard Parish, Homes
Homes in St. Bernard Parish
Of St. Bernard Parish's 18,004 homes, 72% are detached houses, against 65% across Louisiana; 7% are mobile homes. Half of its homes were built before 1980, close to Louisiana's 1982: 15% date from before 1960 and 25% from 2000 or later. 70% 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 | St. Bernard Parish | Louisiana |
|---|---|---|
| Housing units | 18,004 | 2,094,002 |
| Detached houses | 72% | 65% |
| In buildings of 5 or more | 6% | 11% |
| Mobile homes | 7% | 13% |
| Built before 1960 | 15% | 19% |
| Built since 2000 | 25% | 27% |
| Middle year built | 1980 | 1982 |
| Owner-occupied | 70% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.