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 Tensas Parish, Louisiana
EPA puts Tensas Parish in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Nearest county
0.0%
East Baton Rouge Parish, 102 miles
- East Baton Rouge Parish
- 0.0%
- Louisiana
- 2.8%
Share at 4+ pCi/L, 48 tests, 2006 to 2015
Ground above low
None
Level with Louisiana
- Tensas Parish
- 0.0%
- Louisiana
- 0.0%
Share of land USGS rates moderate or high potential
Tests reported
0
None published
A home here needs its own test
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 Tensas 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
Tensas Parish, At a glance
Tensas 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
No CDC test figures here
CDC has published no radon test figures for Tensas Parish. East Baton Rouge Parish, 102 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Tensas Parish, Compared
Tensas Parish radon figures, compared
Calculated by Radon411Tensas Parish has no radon test figure of its own from CDC, whose counts over the 2006 to 2015 laboratory totals name 37 other Louisiana counties and leave it out. Pooled across 37 Louisiana counties, 2.8% of reported tests reached that level; across every county in the country with a figure, 36.3%.
The nearest counties with a figure are East Baton Rouge Parish (102 miles away) at 0.0%, Tangipahoa Parish (110 miles away) at 0.0% and Jefferson Parish (169 miles away) at 1.5%. 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 Tensas 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.
Tensas Parish, Geology
The ground under Tensas Parish
PredictedUSGS's geologic map puts all of Tensas Parish's mapped land in one class: low radon potential. 99.3% 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 | 99.3% |
| Mississippi Alluvial Plain | Alluvial sand, silt, gravel, and clay. | Low | 8 | 0.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Tensas Parish beside the ground around it
Neither Tensas Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 8 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Tensas Parish, Local resources
Radon testing and mitigation in Tensas 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
Tensas Parish, Questions
Questions about radon in Tensas Parish
Are radon levels high in Tensas Parish?
No CDC testing statistics are published here for Tensas Parish, Louisiana yet. Of the 4 nearest counties with a figure, within 171 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 1.5%.
Which counties border Tensas Parish?
Tensas Parish borders 8 counties: Claiborne County, MS, Franklin Parish, LA, Jefferson County, MS, Madison Parish, LA, Adams County, MS, Warren County, MS, Catahoula Parish, LA and Concordia Parish, LA.
Products
Tensas Parish, Products
Testing a home in Tensas Parish
No CDC figure names Tensas Parish; the nearest county with one, East Baton Rouge Parish (102 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 Tensas 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
Tensas Parish, Bordering counties
Counties bordering Tensas Parish
Calculated by Radon411- Radon levels in Franklin Parish, LAEPA zone 3
100.0%at or above 4 pCi/L
Median 5.7 pCi/L · 1 test
- Radon levels in Concordia Parish, LAEPA zone 3
0.0%at or above 4 pCi/L
Median 2.6 pCi/L · 1 test
- Radon levels in Claiborne County, MSEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Jefferson County, MSEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Madison Parish, LAEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Adams County, MSEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Warren County, MSEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Catahoula Parish, LAEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Tensas Parish, Cities and towns
Cities and towns in Tensas Parish
Tensas Parish has been losing residents: from 4,107 in 2020 to 3,700 on July 1, 2025, a fall of 9.9% by the Census Bureau's estimates. Spread over its land, that is 6.1 people to the square mile. Its largest town, Newellton, has 799 residents, 21.6% of the total. Together its 3 incorporated places hold 55.0% of those residents; the other 45.0% live outside any of them. CDC publishes no radon test count for Tensas Parish; across Louisiana its counts for 2006 to 2015 come to 0.1 tests for every 1,000 residents (2025 estimate).
From Newellton to Waterproof, CDC publishes no figure by town: each reads Tensas Parish's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Newellton | 799 | −10.1% | 21.6% |
| St. Joseph | 746 | −9.8% | 20.2% |
| Waterproof | 489 | −10.8% | 13.2% |
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).
Tensas Parish, Homes
Homes in Tensas Parish
Tensas Parish is a place of houses on their own lots: 79% of its 2,804 homes are detached single-family houses, against 65% across Louisiana. The homes are older than Louisiana's as a whole: half were built before 1973 (1982 for Louisiana), and 25% date from before 1960. 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 | Tensas Parish | Louisiana |
|---|---|---|
| Housing units | 2,804 | 2,094,002 |
| Detached houses | 79% | 65% |
| In buildings of 5 or more | 3% | 11% |
| Mobile homes | 17% | 13% |
| Built before 1960 | 25% | 19% |
| Built since 2000 | 13% | 27% |
| Middle year built | 1973 | 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.