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 Avoyelles Parish, Louisiana
EPA puts Avoyelles Parish in Zone 3, its lowest radon zone, and most reported tests there come back low, though 0.0% of 216 (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
- Avoyelles Parish
- 0.0%
- Louisiana
- 3.9%
216 tests, 2021
Median result
0.2pCi/L
Below action level
- Avoyelles Parish
- 0.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2021
Tests reported
216
6th of 14 by tests
- Avoyelles Parish
- 216
- 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
- Avoyelles Parish
- 0.0%
- Caddo Parish
- 20.1%
By share, of 14 with 30+ tests
Read a result for Avoyelles Parish
Starts at Avoyelles 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. Avoyelles Parish's median reported result, 2021.
The data
Avoyelles Parish, At a glance
Avoyelles 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 Avoyelles Parish, 2021
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 0.0% |
| 2018 | 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 216 tests reported to CDC for Avoyelles 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: 2016 to 2021 (every CDC figure on file).
Avoyelles Parish, Compared
Avoyelles Parish radon figures, compared
Calculated by Radon411Only 0 of 216 radon tests reported for Avoyelles Parish in 2021 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 1.2 pCi/L.
Across 21 Louisiana counties pooled together, 3.9% of tests reached that level, so Avoyelles 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. Of 2 neighbours with a figure, all 2 reported a larger share at or above 4 pCi/L; the spread is 0.0% (Catahoula Parish) to 0.0% (Rapides Parish).
Below the action level, 216 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 216 tests reported; the quietest, 2018, had 3.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Avoyelles Parish, Geology
The ground under Avoyelles Parish
PredictedUSGS's geologic map puts all of Avoyelles Parish's mapped land in one class: low radon potential. The map puts 77.1% of Avoyelles Parish in the area it calls Floodplain and 22.9% in Terraces and Prairies. USGS gives the first a radon index of 7 and the second 8, both 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 | 77.1% |
| Terraces and Prairies | Clay, sandy clay, silt, sand, and some gravel. | Low | 8 | 22.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Avoyelles Parish beside the ground around it
Neither Avoyelles Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 8 parishes that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Avoyelles Parish, Local resources
Radon testing and mitigation in Avoyelles 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
Avoyelles Parish, Questions
Questions about radon in Avoyelles Parish
Are radon levels high in Avoyelles Parish?
In 2021, 0.0% of the radon tests reported to CDC for Avoyelles Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.2 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 Avoyelles Parish?
Avoyelles Parish borders 8 parishes: Concordia Parish, Pointe Coupee Parish, St. Landry Parish, Rapides Parish, Evangeline Parish, Catahoula Parish, West Feliciana Parish and LaSalle Parish.
Products
Avoyelles Parish, Products
Testing a home in Avoyelles Parish
In Avoyelles Parish, 0.0% of 216 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 Avoyelles 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
Avoyelles Parish, Bordering parishes
Parishes bordering Avoyelles Parish
Calculated by Radon411- Radon levels in Rapides ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.3 pCi/L · 192 tests · 0.0 points above Avoyelles Parish
- Radon levels in Catahoula ParishEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 63 tests · 0.0 points above Avoyelles Parish
- Radon levels in Concordia ParishEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in Pointe Coupee ParishEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in St. Landry ParishEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in Evangeline ParishEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in West Feliciana ParishEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
- Radon levels in LaSalle ParishEPA zone 3
No CDC figure for 2021; its page reads it against its own neighbours.
Avoyelles Parish, Cities and towns
Cities and towns in Avoyelles Parish
About 37,941 people live in Avoyelles Parish by the Census Bureau's estimate for July 1, 2025, 1,704 fewer than in 2020 (−4.3%). That works out to 46 people per square mile of land. No town dominates: Marksville, the largest, has 4,744 residents, 12.5% of the total. Together its 9 incorporated places hold 38.3% of those residents; the other 61.7% live outside any of them. Testing is reported here more often than across the state: CDC's 216 reported tests for 2021 come to 5.7 for every 1,000 residents (2025 estimate), against 0.7 for Louisiana.
From Marksville to Plaucheville, CDC publishes no figure by town: each reads Avoyelles Parish's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Marksville | 4,744 | −6.2% | 12.5% |
| Bunkie | 3,138 | −6.1% | 8.3% |
| Cottonport | 1,916 | −5.3% | 5.0% |
| Simmesport | 1,400 | −4.2% | 3.7% |
| Mansura | 1,260 | −5.0% | 3.3% |
| Moreauville | 928 | −4.9% | 2.4% |
| Hessmer | 740 | −4.8% | 2.0% |
| Evergreen | 208 | −4.1% | 0.5% |
| Plaucheville | 208 | −6.3% | 0.5% |
9 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).
Avoyelles Parish, Homes
Homes in Avoyelles Parish
Of Avoyelles Parish's 18,323 homes, 70% are detached houses, against 65% across Louisiana; 20% are mobile homes. Half of its homes were built before 1980, close to Louisiana's 1982: 23% date from before 1960 and 22% from 2000 or later. 69% 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 | Avoyelles Parish | Louisiana |
|---|---|---|
| Housing units | 18,323 | 2,094,002 |
| Detached houses | 70% | 65% |
| In buildings of 5 or more | 2% | 11% |
| Mobile homes | 20% | 13% |
| Built before 1960 | 23% | 19% |
| Built since 2000 | 22% | 27% |
| Middle year built | 1980 | 1982 |
| Owner-occupied | 69% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.