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 Chilton County, Alabama
EPA puts Chilton County in Zone 2, its middle radon zone, and only 18 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
22.2%
Elmore County
- Elmore
- 22.2%
- Shelby
- 11.3%
3 of 7 neighbours have 30+ tests, 2008 to 2017
Nearest county
17.1%
Autauga County, 22 miles
- Autauga
- 17.1%
- Alabama
- 21.9%
Share at 4+ pCi/L, 35 tests, 2008 to 2017
Ground above low
100.0%
35.3 pts above Alabama
- Chilton
- 100.0%
- Alabama
- 64.7%
Share of land USGS rates moderate or high potential
Tests reported
18
Too few for a share
- Chilton
- 18
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Chilton 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
Chilton County, At a glance
Chilton County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Chilton County is a
USGS geologic potential: Moderate across 63% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Chilton County, 2008 to 2017, laboratory
CDC holds 18 reported tests for Chilton County over the 2008 to 2017 laboratory totals, with a median of 1.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Chilton County beside the counties around it is how this page reads it.
What these figures count
Only 18 tests were reported to CDC for Chilton County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Chilton County, Compared
Chilton County radon figures, compared
Calculated by Radon411CDC's largest figure for Chilton County rests on 18 tests over the 2008 to 2017 laboratory totals, 2 of them at or above 4 pCi/L, so each test moves its share by 5.6 points and no rank or comparison is drawn from it. Results reached as high as 27.0 pCi/L, with a middle value of 1.1 pCi/L.
Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Elmore County reported the largest share at or above 4 pCi/L, 22.2%, and Shelby County the smallest, 11.3%, with Autauga County at 17.1% between. Farther out, Talladega County (49 miles away) at 18.5%, Jefferson County (50 miles away) at 10.7% and Montgomery County (53 miles away) at 9.7% have figures too. Pooled across 65 Alabama counties, 21.9% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Colbert County reported the highest share (36.2%) and Baldwin County the lowest (0.0%). EPA's 1993 map puts Chilton County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 63% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Chilton County, Geology
The ground under Chilton County
PredictedUSGS's geologic map splits Chilton County: 63.3% of its land is moderate radon potential and 36.7% high. The map puts 57.5% of Chilton County in the area it calls Inner Coastal Plain and 36.7% in Northern Piedmont, with one smaller area beside them. USGS gives the first a radon index of 10, in the moderate band (9 to 11), and the second 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Inner Coastal Plain | Marly sandy clay, chalk, and glauconitic sands. | Moderate | 10 | 57.5% |
| Northern Piedmont | Schist, metagraywake, phyllite, quartz diorite gneiss, amphibolite gneiss, quartz monzonite. | High | 12 | 36.7% |
| Valley and Ridge | Chattanooga black shale, Cambrian-Ordovician limestone and sandstone. | Moderate | 9 | 5.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Chilton County beside the ground around it
Chilton County has more high-potential ground than Alabama as a whole: 36.7% of its land against 14.3%. Of the 7 counties that border it, 1 has more high-potential ground, Coosa County the most at 46.6%.
The map rates the ground, not the air in any home.
Local help
Chilton County, Local resources
Radon testing and mitigation in Chilton County
- Alabama Radon ProgramAlabama Radon Program, run by Alabama Department of Public Health, answers questions about testing, mitigation and the rules in Alabama.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 Alabama directoryNo professionals are listed in Alabama yet. The state program can point you to registered testers and mitigators.
What Alabama's program says
- Phone
- (334) 290-6244
What it means
Chilton County, Questions
Questions about radon in Chilton County
Are radon levels high in Chilton County?
Over the 2008 to 2017 laboratory totals, 11.1% of the radon tests reported to CDC for Chilton County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.1 pCi/L. Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Elmore County reported the largest share at or above 4 pCi/L, 22.2%, and Shelby County the smallest, 11.3%, with Autauga County at 17.1% between.
Which counties border Chilton County?
Chilton County borders 7 counties: Coosa County, Autauga County, Bibb County, Shelby County, Elmore County, Perry County and Dallas County.
Products
Chilton County, Products
Testing a home in Chilton County
No CDC figure names Chilton County; the nearest county with one, Autauga County (22 miles away), reported 17.1% 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. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Chilton County; a long-term test tells the year-round average.
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
MonitorForensics Detectors
FD-65-RADON rechargeable radon detector with a color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Chilton County, Bordering counties
Counties bordering Chilton County
Calculated by Radon411- Radon levels in Bibb CountyEPA zone 2
25.0%at or above 4 pCi/L
Median 2.5 pCi/L · 4 tests
- Radon levels in Elmore CountyEPA zone 2
22.2%at or above 4 pCi/L
Median 1.2 pCi/L · 36 tests
- Radon levels in Autauga CountyEPA zone 2
17.1%at or above 4 pCi/L
Median 0.9 pCi/L · 35 tests
- Radon levels in Shelby CountyEPA zone 2
11.3%at or above 4 pCi/L
Median 1.3 pCi/L · 373 tests
- Radon levels in Coosa CountyEPA zone 1
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 9 tests
- Radon levels in Perry CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 3.2 pCi/L · 1 test
- Radon levels in Dallas CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 0.5 pCi/L · 6 tests
Chilton County, Cities and towns
Cities and towns in Chilton County
Chilton County is growing: the Census Bureau puts it at 47,708 residents on July 1, 2025, up 5.9% from 45,053 in 2020. That works out to 69 people per square mile of land. Calera, the largest place on its list (18,992 residents in all), extends beyond Chilton County, so no share of the total is worked out for it. Reported testing is thin here: 18 tests over 2008 to 2017, or 0.4 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.4.
From Calera to Maplesville, CDC publishes no figure by town: each reads Chilton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Caleraextends beyond Chilton County | 18,992 | +14.2% | Counted whole |
| Clanton | 9,289 | +6.3% | 19.5% |
| Jemison | 3,030 | +14.9% | 6.4% |
| Thorsby | 2,203 | +6.5% | 4.6% |
| Maplesville | 670 | +4.4% | 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 Chilton County is counted whole, so it has no share.
Chilton County, Homes
Homes in Chilton County
Of Chilton County's 19,702 homes, 65% are detached houses, against 69% across Alabama; 30% are mobile homes. Half of its homes were built before 1987, close to Alabama's 1985: 13% date from before 1960 and 30% from 2000 or later. Owners live in 77% of the occupied homes (Alabama: 70%), so for most households a test and a fix are their own to order.
| Homes | Chilton County | Alabama |
|---|---|---|
| Housing units | 19,702 | 2,316,192 |
| Detached houses | 65% | 69% |
| In buildings of 5 or more | 1% | 12% |
| Mobile homes | 30% | 13% |
| Built before 1960 | 13% | 16% |
| Built since 2000 | 30% | 27% |
| Middle year built | 1987 | 1985 |
| Owner-occupied | 77% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.