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 LaSalle Parish, Louisiana
EPA puts LaSalle 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, 101 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
- LaSalle 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 LaSalle 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
LaSalle Parish, At a glance
LaSalle 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 LaSalle Parish. East Baton Rouge Parish, 101 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
LaSalle Parish, Compared
LaSalle Parish radon figures, compared
Calculated by Radon411No CDC figure names LaSalle Parish, in any year or ten-year total; over the 2006 to 2015 laboratory totals, the agency's counts reach 37 Louisiana counties without it. 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 (101 miles away) at 0.0%, Calcasieu Parish (122 miles away) at 0.0% and Tangipahoa Parish (127 miles away) at 0.0%. 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 LaSalle 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.
LaSalle Parish, Geology
The ground under LaSalle Parish
PredictedUSGS's geologic map puts all of LaSalle Parish's mapped land in one class: low radon potential. The map puts 43.5% of LaSalle Parish in the area it calls Floodplain and 42.2% in Old Uplands, with one smaller area beside them. USGS gives both 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 | 43.5% |
| Old Uplands | Clays, silts, sands, and ironstone. | Low | 7 | 42.2% |
| Terraces and Prairies | Clay, sandy clay, silt, sand, and some gravel. | Low | 8 | 14.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
LaSalle Parish beside the ground around it
Neither LaSalle Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 6 parishes that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
LaSalle Parish, Local resources
Radon testing and mitigation in LaSalle 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
LaSalle Parish, Questions
Questions about radon in LaSalle Parish
Are radon levels high in LaSalle Parish?
No CDC testing statistics are published here for LaSalle Parish, Louisiana yet. Of the 4 nearest counties with a figure, within 178 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 1.5%.
Which counties border LaSalle Parish?
LaSalle Parish borders 6 parishes: Catahoula Parish, Grant Parish, Winn Parish, Caldwell Parish, Rapides Parish and Avoyelles Parish.
Products
LaSalle Parish, Products
Testing a home in LaSalle Parish
No CDC figure names LaSalle Parish; the nearest county with one, East Baton Rouge Parish (101 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 LaSalle 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
lüft plug-in radon and indoor air quality monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Wi-Fi, Bluetooth
- App only
First reading: Within 90 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
LaSalle Parish, Bordering parishes
Parishes bordering LaSalle Parish
Calculated by Radon411- Radon levels in Grant ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 3.9 pCi/L · 2 tests
- Radon levels in Winn ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 1 test
- Radon levels in Rapides ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 4 tests
- Radon levels in Catahoula ParishEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Caldwell ParishEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Avoyelles ParishEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
LaSalle Parish, Cities and towns
Cities and towns in LaSalle Parish
The Census Bureau estimates 15,154 residents in LaSalle Parish for July 1, 2025, 330 more than in 2020 (+2.2%). That works out to 24 people per square mile of land. Its largest town, Jena, has 4,229 residents, 27.9% of the total. CDC publishes no radon test count for LaSalle Parish; across Louisiana its counts for 2006 to 2015 come to 0.1 tests for every 1,000 residents (2025 estimate).
From Jena to Tullos, CDC publishes no figure by town: each reads LaSalle Parish's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Jena | 4,229 | +1.6% | 27.9% |
| Olla | 1,325 | +2.2% | 8.7% |
| Urania | 1,155 | +1.7% | 7.6% |
| Tullosextends beyond LaSalle Parish | 310 | +0.3% | Counted whole |
4 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 LaSalle Parish is counted whole, so it has no share.
LaSalle Parish, Homes
Homes in LaSalle Parish
Of LaSalle Parish's 6,203 homes, 69% are detached houses, against 65% across Louisiana; 27% are mobile homes. Half of its homes were built before 1980, close to Louisiana's 1982: 26% date from before 1960 and 22% from 2000 or later. Owners live in 83% of the occupied homes (Louisiana: 67%), so for most households a test and a fix are their own to order.
| Homes | LaSalle Parish | Louisiana |
|---|---|---|
| Housing units | 6,203 | 2,094,002 |
| Detached houses | 69% | 65% |
| In buildings of 5 or more | under 1% | 11% |
| Mobile homes | 27% | 13% |
| Built before 1960 | 26% | 19% |
| Built since 2000 | 22% | 27% |
| Middle year built | 1980 | 1982 |
| Owner-occupied | 83% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.