Skip to content
RADON411

Locations and reports

Radon Levels in Plaquemines Parish, Louisiana

EPA puts Plaquemines Parish in Zone 3, its lowest radon zone, and only 3 radon tests from it are on file with CDC (2020). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Highest bordering

    1.5%

    Jefferson Parish

    Jefferson Parish
    1.5%

    1 of 3 neighbours have 30+ tests, 2006 to 2015

  • Nearest county

    1.5%

    Jefferson Parish, 39 miles

    Jefferson Parish
    1.5%
    Louisiana
    2.8%

    Share at 4+ pCi/L, 67 tests, 2006 to 2015

  • Ground above low

    None

    Level with Louisiana

    Plaquemines Parish
    0.0%
    Louisiana
    0.0%

    Share of land USGS rates moderate or high potential

  • Tests reported

    6

    Too few for a share

    Plaquemines Parish
    6
    Needed
    30

    2017

  • 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

Read a result for Plaquemines Parish

Starts at EPA's action level

4.0pCi/L

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

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 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.

Interpret this readingWhat a fix costs

The data

Plaquemines Parish, At a glance

Plaquemines Parish at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Plaquemines 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 88% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Plaquemines Parish, 2020

Share of reported tests at or above 4 pCi/L, by year, Plaquemines Parish
Share of reported tests at or above 4 pCi/L, by year, Plaquemines Parish
YearShare of reported tests at or above 4 pCi/L
20140.0%
20150.0%
20170.0%
20190.0%
20200.0%

2020: 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

Only 3 tests were reported to CDC for Plaquemines Parish over 2020, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the parish nor this house.

Measured: CDC tracking data. Figure above: 2020. Measured data period: 2005 to 2020 (every CDC figure on file).

How to read these figures

Plaquemines Parish, Compared

Plaquemines Parish radon figures, compared

Calculated by Radon411

CDC's largest figure for Plaquemines Parish rests on 6 tests in 2017, 0 of them at or above 4 pCi/L, so each test moves its share by 16.7 points and no rank or comparison is drawn from it. Results reached as high as 0.8 pCi/L, with a middle value of 0.7 pCi/L.

Jefferson Parish, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 1.5% of its tests at or above 4 pCi/L. Farther out, Tangipahoa Parish (95 miles away) at 0.0%, East Baton Rouge Parish (117 miles away) at 0.0% and Calcasieu Parish (232 miles away) at 0.0% have figures too. Pooled across 37 Louisiana counties, 2.8% of reported tests reached that level; across every county in the country with a figure, 36.3%.

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 Plaquemines Parish in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 88% of the county's land low radon potential.

Louisiana, the United States and the counties around Plaquemines Parish, 2006 to 2015, laboratory
AreaTestsAt or above 4 pCi/LMedian
Louisiana, pooled37 counties, pooled4342.8%Not pooled
United States, pooled2,669 counties, pooled1,805,52836.3%Not pooled
Calcasieu Parishhighest in the state590.0%0.2 pCi/L
Tangipahoa Parishlowest in the state430.0%0.1 pCi/L
Jefferson Parish, LAborders it671.5%0.2 pCi/L
Orleans Parish, LAborders it270.0%0.2 pCi/L
The nearest Louisiana counties to Plaquemines Parish with 30 or more tests, 2006 to 2015, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Jefferson Parish39 mi671.5%0.2 pCi/L
Tangipahoa Parish95 mi430.0%0.1 pCi/L
East Baton Rouge Parish117 mi480.0%0.6 pCi/L
Calcasieu Parish232 mi590.0%0.2 pCi/L
Plaquemines Parish radon tests by year, against Louisiana's pooled share
YearTestsAt or above 4 pCi/LMedianHighestLouisiana, pooledChange from the row before
202030.0%0.9 pCi/L0.9 pCi/L0.8%Level
201930.0%1.7 pCi/L1.7 pCi/L2.0%Level
201760.0%0.7 pCi/L0.8 pCi/L2.6%Level
201530.0%2.6 pCi/L2.6 pCi/L7.2%Level
201430.0%1.2 pCi/L1.2 pCi/L10.5%First on file

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

Plaquemines Parish, Geology

The ground under Plaquemines Parish

Predicted

USGS's geologic map puts all of Plaquemines Parish's mapped land in one class: low radon potential. 87.9% of it lies in the area the map calls Delta, to which USGS gives a radon index of 6, in the low band (5 to 8).

USGS's geologic areas under Plaquemines Parish
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
DeltaAlluvium and marsh.Low687.9%

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

Plaquemines Parish beside the ground around it

Neither Plaquemines Parish nor Louisiana as a whole has any land USGS rates above low potential. None of the 3 parishes that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Plaquemines Parish, the 3 parishes bordering it and Louisiana
AreaEPA zoneLow potentialModerate potentialHigh potential
Plaquemines ParishZone 387.9%NoneNone
Jefferson ParishZone 384.8%NoneNone
St. Bernard ParishZone 362.2%NoneNone
Orleans ParishZone 3100%NoneNone
Louisiana64 parishes, pooled by land areaVaries98.4%NoneNone

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

Local help

Plaquemines Parish, Local resources

Radon testing and mitigation in Plaquemines Parish

What it means

Plaquemines Parish, Questions

Questions about radon in Plaquemines Parish

Are radon levels high in Plaquemines Parish?

In 2020, 0.0% of the radon tests reported to CDC for Plaquemines Parish, Louisiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.9 pCi/L. Jefferson Parish, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 1.5% of its tests at or above 4 pCi/L.

Which counties border Plaquemines Parish?

Plaquemines Parish borders 3 parishes: Jefferson Parish, St. Bernard Parish and Orleans Parish.

Products

Plaquemines Parish, Products

Testing a home in Plaquemines Parish

No CDC figure names Plaquemines Parish; the nearest county with one, Jefferson Parish (39 miles away), reported 1.5% 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 Plaquemines Parish.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Plaquemines Parish homes, compared

Explore

Plaquemines Parish, Bordering parishes

Parishes bordering Plaquemines Parish

Calculated by Radon411

Plaquemines Parish, Residents

Who lives in Plaquemines Parish

Plaquemines Parish has been losing residents: from 23,503 in 2020 to 22,256 on July 1, 2025, a fall of 5.3% by the Census Bureau's estimates. That works out to 29 people per square mile of land. CDC's 6 reported tests for 2017 work out to 0.3 per 1,000 residents (2025 estimate), close to Louisiana's 0.3.

Census lists no incorporated place in Plaquemines Parish: every home in it reads the county's figures.

Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Plaquemines Parish, Homes

Homes in Plaquemines Parish

Mobile homes are 28% of Plaquemines Parish's 9,625 homes and detached houses 53%, against 65% across Louisiana. Much of Plaquemines Parish is recent building: 47% of its homes have gone up since 2000 and the middle year built is 1998, against 1982 for Louisiana. 74% 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 Plaquemines Parish, Louisiana, 2019 to 2023
HomesPlaquemines ParishLouisiana
Housing units9,6252,094,002
Detached houses53%65%
In buildings of 5 or more2%11%
Mobile homes28%13%
Built before 19604%19%
Built since 200047%27%
Middle year built19981982
Owner-occupied74%67%

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