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 Rapides Parish, Louisiana
EPA puts Rapides Parish in Zone 3, its lowest radon zone, and most reported tests there come back low, though 0.0% of 204 (2022) 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%
0.4 pts below LA
- Rapides Parish
- 0.0%
- Louisiana
- 0.4%
204 tests, 2022
Median result
0.4pCi/L
Below action level
- Rapides Parish
- 0.4 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2022
Tests reported
204
3rd of 9 by tests
- Rapides Parish
- 204
- Caddo Parish
- 486
Reported to CDC before any fix, 2022
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
2 of 9
Top quarter
- Rapides Parish
- 0.0%
- Caddo Parish
- 1.9%
By share, of 9 with 30+ tests
Read a result for Rapides Parish
Starts at Rapides Parish's median, 0.4 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.4 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. Rapides Parish's median reported result, 2022.
The data
Rapides Parish, At a glance
Rapides 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 Rapides Parish, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2018 | 0.0% |
| 2019 | 7.1% |
| 2020 | 0.0% |
| 2021 | 0.0% |
| 2022 | 0.0% |
2022: 0.0%. Across these years the share ran from 0.0% to 7.1%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 204 tests reported to CDC for Rapides Parish over 2022, 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: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).
Rapides Parish, Compared
Rapides Parish radon figures, compared
Calculated by Radon411Only 0 of 204 radon tests reported for Rapides Parish in 2022 reached 4 pCi/L (0.0%). The median result, 0.4 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 0.9 pCi/L.
Across 12 Louisiana counties pooled together, 0.4% of tests reached that level, so Rapides Parish runs 0.4 points below its state. Against the national pool of 23.9%, the gap is 23.9 points lower. Its place in the state: 2nd of 9 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.
Below the action level, 204 tests (100.0%) came in under 2 pCi/L, against 98.1% statewide, and 0 tests (0.0%) fell between 2 and 4, against 1.5% statewide. Over 6 years of annual figures the share held within 2 points, from 0.0% in 2016 to 0.0% in 2022; its peak was 7.1% in 2019. USGS geology rates 100% of the county's land low radon potential.
The busiest year on file was 2022, with 204 tests reported; the quietest, 2017, had 12.
Rapides ParishLouisiana, pooled
| Year | Tests | Rapides Parish, at or above 4 pCi/L | Louisiana, pooled |
|---|---|---|---|
| 2016 | 30 | 0.0% | 2.0% |
| 2018 | 111 | 0.0% | 0.5% |
| 2019 | 42 | 7.1% | 2.0% |
| 2020 | 48 | 0.0% | 0.8% |
| 2021 | 192 | 0.0% | 3.9% |
| 2022 | 204 | 0.0% | 0.4% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Rapides Parish, Geology
The ground under Rapides Parish
PredictedUSGS's geologic map puts all of Rapides Parish's mapped land in one class: low radon potential. 97.4% of it lies in the area the map calls Terraces and Prairies, to which USGS gives a radon index of 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Terraces and Prairies | Clay, sandy clay, silt, sand, and some gravel. | Low | 8 | 97.4% |
| Floodplain | Alluvium, marsh, silt, and clay. | Low | 7 | 2.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Rapides Parish beside the ground around it
Neither Rapides Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 7 parishes that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Rapides Parish, Local resources
Radon testing and mitigation in Rapides 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
Rapides Parish, Questions
Questions about radon in Rapides Parish
Are radon levels high in Rapides Parish?
In 2022, 0.0% of the radon tests reported to CDC for Rapides Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.4 pCi/L. Of 9 Louisiana counties with 30 or more tests for the same period, 1 reported a higher share; pooled, the state comes to 0.4%.
Which counties border Rapides Parish?
Rapides Parish borders 7 parishes: Grant Parish, Evangeline Parish, Avoyelles Parish, Allen Parish, LaSalle Parish, Vernon Parish and Natchitoches Parish.
Products
Rapides Parish, Products
Testing a home in Rapides Parish
In Rapides Parish, 0.0% of 204 tests reported to CDC in 2022 reached 4 pCi/L, against 0.4% 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 Rapides 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
Rapides Parish, Bordering parishes
Parishes bordering Rapides Parish
Calculated by Radon411parishes bordering Rapides Parish: 1 of 7
Rapides Parish, Cities and towns
Cities and towns in Rapides Parish
About 125,877 people live in Rapides Parish by the Census Bureau's estimate for July 1, 2025, 3,778 fewer than in 2020 (−2.9%). That works out to 95 people per square mile of land. Its largest town, Alexandria, has 42,938 residents, 34.1% of the total. Together its 10 incorporated places hold 52.8% of those residents; the other 47.2% live outside any of them. Testing is reported here more often than across the state: CDC's 204 reported tests for 2022 come to 1.6 for every 1,000 residents (2025 estimate), against 0.4 for Louisiana.
From Alexandria to McNary, CDC publishes no figure by town: each reads Rapides Parish's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Alexandria | 42,938 | −4.8% | 34.1% |
| Pineville | 13,967 | −2.8% | 11.1% |
| Ball | 3,793 | −3.8% | 3.0% |
| Woodworth | 1,758 | +0.6% | 1.4% |
| Glenmora | 1,040 | −4.7% | 0.8% |
| Boyce | 864 | −2.8% | 0.7% |
| Lecompte | 822 | −2.7% | 0.7% |
| Forest Hill | 614 | +0.8% | 0.5% |
| Cheneyville | 441 | −5.2% | 0.4% |
| McNary | 195 | −2.0% | 0.2% |
10 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).
Rapides Parish, Homes
Homes in Rapides Parish
Of Rapides Parish's 58,321 homes, 68% are detached houses, against 65% across Louisiana; 16% are mobile homes. Half of its homes were built before 1980, close to Louisiana's 1982: 23% date from before 1960 and 24% from 2000 or later. 65% 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 | Rapides Parish | Louisiana |
|---|---|---|
| Housing units | 58,321 | 2,094,002 |
| Detached houses | 68% | 65% |
| In buildings of 5 or more | 8% | 11% |
| Mobile homes | 16% | 13% |
| Built before 1960 | 23% | 19% |
| Built since 2000 | 24% | 27% |
| Middle year built | 1980 | 1982 |
| Owner-occupied | 65% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.