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 Tangipahoa Parish, Louisiana
EPA puts Tangipahoa Parish in Zone 3, its lowest radon zone, and most reported tests there come back low, though 0.0% of 42 (2021) reached 4 pCi/L. 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%
3.9 pts below LA
- Tangipahoa Parish
- 0.0%
- Louisiana
- 3.9%
42 tests, 2021
Median result
0.9pCi/L
Below action level
- Tangipahoa Parish
- 0.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2021
Tests reported
42
14th of 14 by tests
- Tangipahoa Parish
- 42
- Ascension Parish
- 522
Reported to CDC before any fix, 2021
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 14
Top quarter
- Tangipahoa Parish
- 0.0%
- Caddo Parish
- 20.1%
By share, of 14 with 30+ tests
Read a result for Tangipahoa Parish
Starts at Tangipahoa Parish's median, 0.9 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.9 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. Tangipahoa Parish's median reported result, 2021.
The data
Tangipahoa Parish, At a glance
Tangipahoa 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 Tangipahoa Parish, 2021
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2015 | 0.0% |
| 2016 | 0.0% |
| 2017 | 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
These are the 42 tests reported to CDC for Tangipahoa Parish over 2021, many from homes being sold or already suspected of a problem: they describe the parish's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2021. Measured data period: 2005 to 2021 (every CDC figure on file).
Tangipahoa Parish, Compared
Tangipahoa Parish radon figures, compared
Calculated by Radon411Only 0 of 42 radon tests reported for Tangipahoa Parish in 2021 reached 4 pCi/L (0.0%). The median result, 0.9 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 1.6 pCi/L.
Across 21 Louisiana counties pooled together, 3.9% of tests reached that level, so Tangipahoa Parish runs 3.9 points below its state. Against the national pool of 24.4%, the gap is 24.4 points lower. Its place in the state: 3rd of 14 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. St. Tammany Parish, the one bordering county with a figure for the same period, reported 0.0%.
Below the action level, 42 tests (100.0%) came in under 2 pCi/L, against 92.3% statewide, and 0 tests (0.0%) fell between 2 and 4, against 3.8% statewide. USGS geology rates 100% of the county's land low radon potential.
The busiest year on file was 2021, with 42 tests reported; the quietest, 2015, had 3.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Tangipahoa Parish, Geology
The ground under Tangipahoa Parish
PredictedUSGS's geologic map puts all of Tangipahoa Parish's mapped land in one class: low radon potential. The map puts 83.4% of Tangipahoa Parish in the area it calls Terraces and 16.6% 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 | Clays, siltstone, and sandstone. | Low | 8 | 83.4% |
| Delta | Alluvium and marsh. | Low | 6 | 16.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Tangipahoa Parish beside the ground around it
Neither Tangipahoa Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 7 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Tangipahoa Parish, Local resources
Radon testing and mitigation in Tangipahoa 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
Tangipahoa Parish, Questions
Questions about radon in Tangipahoa Parish
Are radon levels high in Tangipahoa Parish?
In 2021, 0.0% of the radon tests reported to CDC for Tangipahoa Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.9 pCi/L. Of 14 Louisiana counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 3.9%.
Which counties border Tangipahoa Parish?
Tangipahoa Parish borders 7 counties: Livingston Parish, LA, St. Helena Parish, LA, St. Tammany Parish, LA, Washington Parish, LA, St. John the Baptist Parish, LA, Pike County, MS and Amite County, MS.
Products
Tangipahoa Parish, Products
Testing a home in Tangipahoa Parish
In Tangipahoa Parish, 0.0% of 42 tests reported to CDC in 2021 reached 4 pCi/L, against 3.9% 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 Tangipahoa 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
Tangipahoa Parish, Bordering counties
Counties bordering Tangipahoa Parish
Calculated by Radon411- Radon levels in St. Tammany Parish, LAEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 93 tests · 0.0 points above Tangipahoa Parish
- Radon levels in Livingston Parish, LAEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in St. Helena Parish, LAEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in Washington Parish, LAEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in Pike County, MSEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in Amite County, MSEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
Tangipahoa Parish, Cities and towns
Cities and towns in Tangipahoa Parish
Tangipahoa Parish is growing: the Census Bureau puts it at 141,346 residents on July 1, 2025, up 5.8% from 133,651 in 2020. That works out to 179 people per square mile of land. No town dominates: Hammond, the largest, has 24,032 residents, 17.0% of the total. Together its 8 incorporated places hold 29.6% of those residents; the other 70.4% live outside any of them. Reported testing is thin here: 42 tests over 2021, or 0.3 for every 1,000 residents (2025 estimate), where Louisiana as a whole comes to 0.7.
From Hammond to Tangipahoa, CDC publishes no figure by town: each reads Tangipahoa Parish's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Hammond | 24,032 | +22.5% | 17.0% |
| Ponchatoula | 7,755 | −1.0% | 5.5% |
| Amite City | 4,081 | +1.7% | 2.9% |
| Kentwood | 2,217 | +2.4% | 1.6% |
| Independence | 1,665 | +2.1% | 1.2% |
| Roseland | 910 | +2.8% | 0.6% |
| Tickfaw | 691 | +2.7% | 0.5% |
| Tangipahoa | 456 | +6.3% | 0.3% |
8 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).
Tangipahoa Parish, Homes
Homes in Tangipahoa Parish
Of Tangipahoa Parish's 58,663 homes, 66% are detached houses, against 65% across Louisiana; 20% are mobile homes. Much of Tangipahoa Parish is recent building: 38% of its homes have gone up since 2000 and the middle year built is 1992, against 1982 for Louisiana. 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 | Tangipahoa Parish | Louisiana |
|---|---|---|
| Housing units | 58,663 | 2,094,002 |
| Detached houses | 66% | 65% |
| In buildings of 5 or more | 5% | 11% |
| Mobile homes | 20% | 13% |
| Built before 1960 | 9% | 19% |
| Built since 2000 | 38% | 27% |
| Middle year built | 1992 | 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.