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 New Madrid County, Missouri
EPA puts New Madrid County in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2021). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
29.4%
Scott County
- Scott
- 29.4%
1 of 7 neighbours have 30+ tests, 2008 to 2017
Nearest county
29.4%
Scott County, 32 miles
- Scott
- 29.4%
- Missouri
- 30.6%
Share at 4+ pCi/L, 51 tests, 2008 to 2017
Ground above low
None
94.2 pts below Missouri
- New Madrid
- 0.0%
- Missouri
- 94.2%
Share of land USGS rates moderate or high potential
Tests reported
10
Too few for a share
- New Madrid
- 10
- Needed
- 30
2007 to 2016, laboratory
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 New Madrid County
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
New Madrid County, At a glance
New Madrid County 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 New Madrid County, 2021
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2015 | 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
Only 1 test was reported to CDC for New Madrid County over 2021, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2021. Measured data period: 2005 to 2021 (every CDC figure on file).
New Madrid County, Compared
New Madrid County radon figures, compared
Calculated by Radon411CDC's largest figure for New Madrid County rests on 10 tests over the 2007 to 2016 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 10.0 points and no rank or comparison is drawn from it. Results reached as high as 7.4 pCi/L, with a middle value of 1.3 pCi/L.
Scott County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 29.4% of its tests at or above 4 pCi/L. Farther out, Butler County (43 miles away) at 21.2%, Cape Girardeau County (54 miles away) at 35.2% and Perry County (77 miles away) at 37.8% have figures too. Pooled across 115 Missouri counties, 30.6% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Atchison County reported the highest share (69.9%) and Vernon County the lowest (8.8%). EPA's 1993 map puts New Madrid County 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.
New Madrid County, Geology
The ground under New Madrid County
PredictedUSGS's geologic map puts all of New Madrid County's mapped land in one class: low radon potential. All of it lies in the area the map calls Coastal Plains Province, to which USGS gives a radon index of 5, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Coastal Plains Province | Tertiary-Quaternary sandstone, shale, and alluvium. | Low | 5 | 99.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
New Madrid County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of New Madrid County's is. Of the 7 counties that border it, 1 has more moderate-potential ground, Stoddard County the most at 0.4%.
The map rates the ground, not the air in any home.
Local help
New Madrid County, Local resources
Radon testing and mitigation in New Madrid County
- Missouri Radon ProgramMissouri Radon Program, run by Missouri Department of Health and Senior Services, offers free or discounted test kits, and answers questions about testing and mitigation in Missouri.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Free radon test kits are available for Missouri residents (limit one per household).
- Compare kits
- Professionals in Missouri27 professionals are listed in Missouri.
What Missouri's program says
- Phone
- 573-751-6102
- radon@health.mo.gov
What it means
New Madrid County, Questions
Questions about radon in New Madrid County
Are radon levels high in New Madrid County?
In 2021, 0.0% of the radon tests reported to CDC for New Madrid County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.4 pCi/L. Scott County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 29.4% of its tests at or above 4 pCi/L.
Which counties border New Madrid County?
New Madrid County borders 7 counties: Lake County, TN, Mississippi County, MO, Stoddard County, MO, Dunklin County, MO, Pemiscot County, MO, Scott County, MO and Fulton County, KY.
Products
New Madrid County, Products
Testing a home in New Madrid County
No CDC figure names New Madrid County; the nearest county with one, Scott County (32 miles away), reported 29.4% of its tests at or above 4 pCi/L over the 2008 to 2017 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 New Madrid County.
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
Wave Plus battery radon and air quality monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- App only
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
New Madrid County, Bordering counties
Counties bordering New Madrid County
Calculated by Radon411- Radon levels in Scott County, MOEPA zone 3
29.4%at or above 4 pCi/L
Median 2.2 pCi/L · 51 tests
- Radon levels in Stoddard County, MOEPA zone 3
12.0%at or above 4 pCi/L
Median 1.1 pCi/L · 25 tests
- Radon levels in Dunklin County, MOEPA zone 3
6.3%at or above 4 pCi/L
Median 1.3 pCi/L · 16 tests
- Radon levels in Lake County, TNEPA zone 3
0.0%at or above 4 pCi/L
Median 1.0 pCi/L · 7 tests
- Radon levels in Mississippi County, MOEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 4 tests
- Radon levels in Pemiscot County, MOEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 5 tests
- Radon levels in Fulton County, KYEPA zone 3
0.0%at or above 4 pCi/L
Median 1.9 pCi/L · 1 test
New Madrid County, Cities and towns
Cities and towns in New Madrid County
New Madrid County has been losing residents: from 16,329 in 2020 to 15,086 on July 1, 2025, a fall of 7.6% by the Census Bureau's estimates. That works out to 22 people per square mile of land. Sikeston, the largest place on its list (15,983 residents in all), extends beyond New Madrid County, so no share of the total is worked out for it. Reported testing is thin here: 10 tests over 2007 to 2016, or 0.7 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 8.8.
From Sikeston to North Lilbourn, CDC publishes no figure by town: each reads New Madrid County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Sikestonextends beyond New Madrid County | 15,983 | −1.7% | Counted whole |
| Portagevilleextends beyond New Madrid County | 2,702 | −7.6% | Counted whole |
| New Madrid | 2,586 | −6.5% | 17.1% |
| Lilbourn | 906 | −8.5% | 6.0% |
| Gideon | 709 | −8.8% | 4.7% |
| Morehouse | 681 | −7.8% | 4.5% |
| Parma | 506 | −8.7% | 3.4% |
| Matthews | 493 | −7.2% | 3.3% |
| Marston | 362 | −7.4% | 2.4% |
| Risco | 261 | −8.1% | 1.7% |
| Howardville | 250 | −8.4% | 1.7% |
| Canalou | 145 | −7.1% | 1.0% |
- Tallapoosa
- Catron
- North Lilbourn
15 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond New Madrid County is counted whole, so it has no share.
New Madrid County, Homes
Homes in New Madrid County
Of New Madrid County's 7,886 homes, 73% are detached houses, against 70% across Missouri; 12% are mobile homes. Half of its homes were built before 1975, close to Missouri's 1978: 23% date from before 1960 and 13% from 2000 or later. 64% of occupied homes are lived in by their owner (Missouri: 68%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | New Madrid County | Missouri |
|---|---|---|
| Housing units | 7,886 | 2,809,501 |
| Detached houses | 73% | 70% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 12% | 5% |
| Built before 1960 | 23% | 28% |
| Built since 2000 | 13% | 21% |
| Middle year built | 1975 | 1978 |
| Owner-occupied | 64% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.