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 Madison County, Mississippi
EPA puts Madison County in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Nearest county
0.0%
Tangipahoa Parish, 140 miles
- Tangipahoa Parish
- 0.0%
Share at 4+ pCi/L, 43 tests, 2006 to 2015
Ground above low
None
8.1 pts below MS
- Madison
- 0.0%
- MS
- 8.1%
Share of land USGS rates moderate or high potential
Tests reported
0
None published
A home here needs its own test
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 Madison 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
Madison County, At a glance
Madison 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
No CDC test figures here
CDC has published no radon test figures for Madison County. Tangipahoa Parish, LA, 140 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Madison County, Compared
Madison County radon figures, compared
Calculated by Radon411Madison County is in a state CDC's county radon counts do not reach: no Mississippi county has a figure, while 2,669 counties elsewhere do over the 2006 to 2015 laboratory totals. Across every county in the country with a figure (2,669), 36.3% of reported tests reached that level; no Mississippi county contributes to that pool.
The nearest counties with a figure are Tangipahoa Parish, LA (140 miles away) at 0.0%, Tuscaloosa County, AL (153 miles away) at 10.1% and East Baton Rouge Parish, LA (157 miles away) at 0.0%.
EPA's 1993 map puts Madison 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.
Madison County, Geology
The ground under Madison County
PredictedUSGS's geologic map puts all of Madison County's mapped land in one class: low radon potential. The map puts 45.8% of Madison County in the area it calls North Central Hills/Flatwoods and 37.4% in Jackson Prairies, with one smaller area beside them. USGS gives both 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 |
|---|---|---|---|---|
| North Central Hills/Flatwoods | Tertiary nonmarine to deltaic sediments ranging from sand to clay. | Low | 8 | 45.8% |
| Jackson Prairies | Sand, marl, clay, and limestone. | Low | 8 | 37.4% |
| Loess Hills | Loess. | Low | 7 | 16.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Madison County beside the ground around it
Across Mississippi 0.1% of the land is rated high; none of Madison County's is. None of the 7 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Madison County, Local resources
Radon testing and mitigation in Madison County
- Mississippi Radon ProgramMississippi Radon Program, run by Mississippi State Department of Health, answers questions about testing, mitigation and the rules in Mississippi.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 Mississippi directoryNo professionals are listed in Mississippi yet. The state program can point you to registered testers and mitigators.
What Mississippi's program says
- Phone
- 1-800-626-7739
What it means
Madison County, Questions
Questions about radon in Madison County
Are radon levels high in Madison County?
No CDC testing statistics are published here for Madison County, Mississippi yet. Of the 8 nearest counties with a figure, within 192 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 36.6%.
Which counties border Madison County?
Madison County borders 7 counties: Yazoo County, Rankin County, Leake County, Scott County, Hinds County, Holmes County and Attala County.
Products
Madison County, Products
Testing a home in Madison County
No CDC figure names Madison County; the nearest county with one, Tangipahoa Parish, LA (140 miles away), reported 0.0% 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 Madison 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
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
Madison County, Bordering counties
Counties bordering Madison County
Calculated by Radon411counties bordering Madison County: 1 of 7
Madison County, Cities and towns
Cities and towns in Madison County
Madison County is growing: the Census Bureau puts it at 116,298 residents on July 1, 2025, up 6.5% from 109,237 in 2020. That works out to 163 people per square mile of land. Jackson, the largest place on its list (141,196 residents in all), extends beyond Madison County, so no share of the total is worked out for it.
From Jackson to Flora, CDC publishes no figure by town: each reads Madison County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Jacksonextends beyond Madison County | 141,196 | −7.7% | Counted whole |
| Madison | 28,575 | +3.0% | 24.6% |
| Ridgeland | 24,750 | +0.5% | 21.3% |
| Canton | 10,873 | −0.3% | 9.3% |
| Flora | 1,677 | +1.5% | 1.4% |
5 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). A place that extends beyond Madison County is counted whole, so it has no share.
Madison County, Homes
Homes in Madison County
Madison County is a place of houses on their own lots: 75% of its 46,798 homes are detached single-family houses, against 69% across Mississippi. Much of Madison County is recent building: 41% of its homes have gone up since 2000 and the middle year built is 1995, against 1986 for Mississippi. 71% of occupied homes are lived in by their owner (Mississippi: 69%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Madison County | Mississippi |
|---|---|---|
| Housing units | 46,798 | 1,332,811 |
| Detached houses | 75% | 69% |
| In buildings of 5 or more | 13% | 9% |
| Mobile homes | 5% | 15% |
| Built before 1960 | 6% | 15% |
| Built since 2000 | 41% | 28% |
| Middle year built | 1995 | 1986 |
| Owner-occupied | 71% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.