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Radon Levels in East Baton Rouge Parish, Louisiana

EPA puts East Baton Rouge Parish in Zone 3, its lowest radon zone, and most reported tests there come back low, though 0.0% of 447 (2022) reached 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

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  • Share at 4+ pCi/L

    0.0%

    0.4 pts below LA

    East Baton Rouge Parish
    0.0%
    Louisiana
    0.4%

    447 tests, 2022

  • Median result

    0.2pCi/L

    Below action level

    East Baton Rouge Parish
    0.2 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2022

  • Tests reported

    447

    2nd of 9 by tests

    East Baton Rouge Parish
    447
    Caddo Parish
    486

    Reported to CDC before any fix, 2022

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

  • Rank in Louisiana

    2 of 9

    Top quarter

    East Baton Rouge Parish
    0.0%
    Caddo Parish
    1.9%

    By share, of 9 with 30+ tests

Read a result for East Baton Rouge Parish

Starts at East Baton Rouge Parish's median, 0.2 pCi/L

0.2pCi/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

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is below 2 pCi/L, the level at which EPA says a fix should be considered. East Baton Rouge Parish's median reported result, 2022.

Interpret this reading

The data

East Baton Rouge Parish, At a glance

East Baton Rouge Parish at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for East Baton Rouge Parish as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

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 East Baton Rouge Parish, 2022

Share of reported tests at or above 4 pCi/L, by year, East Baton Rouge Parish
Share of reported tests at or above 4 pCi/L, by year, East Baton Rouge Parish
YearShare of reported tests at or above 4 pCi/L
20140.0%
20156.3%
20160.0%
20171.3%
20180.0%
20190.0%
20200.0%
20210.0%
20220.0%

2022: 0.0%. Across these years the share ran from 0.0% to 6.3%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 447 tests reported to CDC for East Baton Rouge 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).

How to read these figures

East Baton Rouge Parish, Compared

East Baton Rouge Parish radon figures, compared

Calculated by Radon411

Only 0 of 447 radon tests reported for East Baton Rouge Parish in 2022 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 3.5 pCi/L.

Across 12 Louisiana counties pooled together, 0.4% of tests reached that level, so East Baton Rouge 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. West Baton Rouge Parish, the one bordering county with a figure for the same period, reported 0.0%.

Below the action level, 444 tests (99.3%) came in under 2 pCi/L, against 98.1% statewide, and 3 tests (0.7%) fell between 2 and 4, against 1.5% statewide. Over 9 years of annual figures the share held within 2 points, from 0.0% in 2014 to 0.0% in 2022; its peak was 6.3% in 2015. USGS geology rates 100% of the county's land low radon potential.

The busiest year on file was 2018, with 501 tests reported; the quietest, 2015, had 96.

Share of reported tests at or above 4 pCi/L by year, East Baton Rouge Parish against Louisiana2014 to 2022, years with 30 or more tests: East Baton Rouge Parish 0.0% to 0.0%, the state's pooled share 0.4% in 2022.
East Baton Rouge ParishLouisiana, pooled
Share of reported tests at or above 4 pCi/L by year, East Baton Rouge Parish against Louisiana: data table
YearTestsEast Baton Rouge Parish, at or above 4 pCi/LLouisiana, pooled
20141260.0%10.5%
2015966.3%7.2%
20164920.0%2.0%
20172311.3%2.6%
20185010.0%0.5%
2019990.0%2.0%
20201920.0%0.8%
20214200.0%3.9%
20224470.0%0.4%
East Baton Rouge Parish against Louisiana, the United States and nearby counties, 2022
AreaTestsAt or above 4 pCi/LMedianDifference from East Baton Rouge Parish
East Baton Rouge Parish4470.0%0.2 pCi/LThis county
Louisiana, pooled12 counties, pooled2,0220.4%Not pooled+0.4 points
United States, pooled853 counties, pooled333,14023.9%Not pooled+23.9 points
Caddo Parishhighest in the state4861.9%0.4 pCi/L+1.9 points
Assumption Parishlowest in the state1020.0%0.2 pCi/LLevel
West Baton Rouge Parish, LAborders it420.0%0.6 pCi/LLevel
Where East Baton Rouge Parish's reported results fell, 2022, beside Louisiana and the United States
ResultEast Baton Rouge Parish testsEast Baton Rouge Parish shareLouisiana shareU.S. shareAgainst Louisiana
Under 2 pCi/L44499.3%98.1%54.5%+1.2 points
2 to 4 pCi/L30.7%1.5%21.7%−0.8 points
4 pCi/L and above00.0%0.4%23.9%−0.4 points
East Baton Rouge Parish ranked among the 9 Louisiana counties with 30 or more tests, by share at or above 4 pCi/L, 2022
CountyRankTestsAt or above 4 pCi/LMedian
Caddo Parish1 of 94861.9%0.4 pCi/L
East Baton Rouge Parish2 of 94470.0%0.2 pCi/L
Rapides Parish2 of 92040.0%0.4 pCi/L
Lafayette Parish2 of 92010.0%0.2 pCi/L
Orleans Parish2 of 91980.0%0.3 pCi/L
Union Parish2 of 91920.0%0.2 pCi/L
Webster Parish2 of 91380.0%0.2 pCi/L
Assumption Parish2 of 91020.0%0.2 pCi/L
West Baton Rouge Parish2 of 9420.0%0.6 pCi/L
East Baton Rouge Parish radon tests by year, against Louisiana's pooled share
YearTestsAt or above 4 pCi/LMedianHighestLouisiana, pooledChange from the row before
20224470.0%0.2 pCi/L3.5 pCi/L0.4%Level
20214200.0%0.4 pCi/L3.8 pCi/L3.9%Level
20201920.0%0.6 pCi/L2.2 pCi/L0.8%Level
2019990.0%0.8 pCi/L2.6 pCi/L2.0%Level
20185010.0%0.2 pCi/L3.6 pCi/L0.5%−1.3 points
20172311.3%0.6 pCi/L6.5 pCi/L2.6%+1.3 points
20164920.0%0.2 pCi/L3.7 pCi/L2.0%−6.3 points
2015966.3%0.2 pCi/L5.5 pCi/L7.2%+6.3 points
20141260.0%1.1 pCi/L3.8 pCi/L10.5%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

East Baton Rouge Parish, Geology

The ground under East Baton Rouge Parish

Predicted

USGS's geologic map puts all of East Baton Rouge Parish's mapped land in one class: low radon potential. The map puts 54.8% of East Baton Rouge Parish in the area it calls Terraces and 44.4% in Floodplain, with one smaller area beside them. USGS gives the first a radon index of 8 and the second 7, both in the low band (5 to 8).

USGS's geologic areas under East Baton Rouge Parish
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
TerracesClays, siltstone, and sandstone.Low854.8%
FloodplainAlluvium, marsh, silt, and clay.Low744.4%
DeltaAlluvium and marsh.Low60.8%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

East Baton Rouge Parish beside the ground around it

Neither East Baton Rouge 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.

Share of land by USGS radon potential: East Baton Rouge Parish, the 6 parishes bordering it and Louisiana
AreaEPA zoneLow potentialModerate potentialHigh potential
East Baton Rouge ParishZone 3100%NoneNone
West Baton Rouge ParishZone 3100%NoneNone
East Feliciana ParishZone 3100%NoneNone
Iberville ParishZone 3100%NoneNone
Livingston ParishZone 3100%NoneNone
Ascension ParishZone 3100%NoneNone
St. Helena ParishZone 3100%NoneNone
Louisiana64 parishes, pooled by land areaVaries98.4%NoneNone

The map rates the ground, not the air in any home.

Local help

East Baton Rouge Parish, Local resources

Radon testing and mitigation in East Baton Rouge Parish

What it means

East Baton Rouge Parish, Questions

Questions about radon in East Baton Rouge Parish

Are radon levels high in East Baton Rouge Parish?

In 2022, 0.0% of the radon tests reported to CDC for East Baton Rouge Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.2 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 East Baton Rouge Parish?

East Baton Rouge Parish borders 6 parishes: West Baton Rouge Parish, East Feliciana Parish, Iberville Parish, Livingston Parish, Ascension Parish and St. Helena Parish.

Products

East Baton Rouge Parish, Products

Testing a home in East Baton Rouge Parish

In East Baton Rouge Parish, 0.0% of 447 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 East Baton Rouge Parish.

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Best radon monitors for East Baton Rouge Parish homes, compared

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East Baton Rouge Parish, Bordering parishes

Parishes bordering East Baton Rouge Parish

Calculated by Radon411

East Baton Rouge Parish, Cities and towns

Cities and towns in East Baton Rouge Parish

East Baton Rouge Parish's population has barely moved since 2020: 456,180 residents on July 1, 2025 against 455,907 then, by the Census Bureau's estimates. Packed into its land, that is 1,001 people per square mile. Its largest town, Baton Rouge, has 222,795 residents, 48.8% of the total. Together its 4 incorporated places hold 62.7% of those residents; the other 37.3% live outside any of them. Testing is reported here more often than across the state: CDC's 447 reported tests for 2022 come to 1.0 for every 1,000 residents (2025 estimate), against 0.4 for Louisiana.

From Baton Rouge to Baker, CDC publishes no figure by town: each reads East Baton Rouge Parish's.

The cities and towns in East Baton Rouge Parish by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Baton Rouge222,795−1.4%48.8%
Central30,313+2.5%6.6%
Zachary20,621+5.7%4.5%
Baker12,136−2.6%2.7%

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).

East Baton Rouge Parish, Homes

Homes in East Baton Rouge Parish

Of East Baton Rouge Parish's 205,518 homes, 62% are detached houses, against 65% across Louisiana; 24% are in buildings of five or more homes. Half of its homes were built before 1983, close to Louisiana's 1982: 14% date from before 1960 and 27% from 2000 or later. 59% 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 in East Baton Rouge Parish, Louisiana, 2019 to 2023
HomesEast Baton Rouge ParishLouisiana
Housing units205,5182,094,002
Detached houses62%65%
In buildings of 5 or more24%11%
Mobile homes3%13%
Built before 196014%19%
Built since 200027%27%
Middle year built19831982
Owner-occupied59%67%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.