
Long-term kit![]()
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
EPA puts Coosa County in Zone 1, its highest radon zone, and only 9 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
4 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
22.2%
Elmore County, 24 miles
Share at 4+ pCi/L, 36 tests, 2008 to 2017
Ground above low
100.0%
35.3 pts above Alabama
Share of land USGS rates moderate or high potential
Tests reported
11
Too few for a share
2005 to 2014, laboratory
EPA radon zone
Zone 1
Highest potential
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Read a result for Coosa County
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
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
Coosa County, At a glance
Predicted: EPA radon zone
EPA puts all of Coosa County in
USGS geologic potential: Moderate across 53% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
CDC holds 9 reported tests for Coosa County over the 2008 to 2017 laboratory totals, with a median of 1.4 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Coosa County beside the counties around it is how this page reads it.
Only 9 tests were reported to CDC for Coosa 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).
Coosa County, Compared
CDC's largest figure for Coosa County rests on 11 tests over the 2005 to 2014 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 9.1 points and no rank or comparison is drawn from it. Results reached as high as 8.9 pCi/L, with a middle value of 1.4 pCi/L.
Of the counties bordering it, 4 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 Talladega County at 18.5% and Clay County at 17.9% between. Farther out, Autauga County (36 miles away) at 17.1%, Montgomery County (49 miles away) at 9.7% and St. Clair County (54 miles away) at 14.0% 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 Coosa County in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 53% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Coosa County, Geology
USGS's geologic map splits Coosa County: 53.4% of its land is moderate radon potential and 46.6% high. The map puts 53.1% of Coosa County in the area it calls Northern Piedmont and 46.6% in Northern Piedmont. USGS gives the first a radon index of 9, 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 |
|---|---|---|---|---|
| Northern Piedmont | Graphitic schists, phyllites, and felsic gneiss. | Moderate | 9 | 53.1% |
| Northern Piedmont | Schist, metagraywake, phyllite, quartz diorite gneiss, amphibolite gneiss, quartz monzonite. | High | 12 | 46.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Coosa County has more high-potential ground than Alabama as a whole: 46.6% of its land against 14.3%. Of the 6 counties that border it, 2 have more high-potential ground, Clay County the most at 69.6%.
The map rates the ground, not the air in any home.
Local help
Coosa County, Local resources
What it means
Coosa County, Questions
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Coosa County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.4 pCi/L. Of the counties bordering it, 4 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 Talladega County at 18.5% and Clay County at 17.9% between.
Coosa County borders 6 counties: Chilton County, Elmore County, Tallapoosa County, Shelby County, Talladega County and Clay County.
Products
Coosa County, Products
No CDC figure names Coosa County; the nearest county with one, Elmore County (24 miles away), reported 22.2% 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 1 the year-round level in Coosa County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.
Test kits and monitors: 1 of 3
Coosa County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Coosa County
Explore
Coosa County, Bordering counties
22.2%at or above 4 pCi/L
Median 1.2 pCi/L · 36 tests
18.5%at or above 4 pCi/L
Median 1.6 pCi/L · 124 tests
17.9%at or above 4 pCi/L
Median 0.9 pCi/L · 39 tests
11.3%at or above 4 pCi/L
Median 1.3 pCi/L · 373 tests
11.1%at or above 4 pCi/L
Median 1.1 pCi/L · 18 tests
6.3%at or above 4 pCi/L
Median 0.9 pCi/L · 16 tests
Coosa County, Cities and towns
About 10,161 people live in Coosa County by the Census Bureau's estimate for July 1, 2025, 177 fewer than in 2020 (−1.7%). That works out to 16 people per square mile of land. No town dominates: Goodwater, the largest, has 1,256 residents, 12.4% of the total. Together its 3 incorporated places hold 17.0% of those residents; the other 83.0% live outside any of them. Reported testing is thin here: 11 tests over 2005 to 2014, or 1.1 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.7.
From Goodwater to Kellyton, CDC publishes no figure by town: each reads Coosa County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Goodwater | 1,256 | −3.0% | 12.4% |
| Rockford | 345 | −1.4% | 3.4% |
| Kellyton | 123 | −2.4% | 1.2% |
3 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).
Coosa County, Homes
Of Coosa County's 6,042 homes, 64% are detached houses, against 69% across Alabama; 31% are mobile homes. Half of its homes were built before 1986, close to Alabama's 1985: 18% date from before 1960 and 22% from 2000 or later. Owners live in 81% of the occupied homes (Alabama: 70%), so for most households a test and a fix are their own to order.
| Homes | Coosa County | Alabama |
|---|---|---|
| Housing units | 6,042 | 2,316,192 |
| Detached houses | 64% | 69% |
| In buildings of 5 or more | 3% | 12% |
| Mobile homes | 31% | 13% |
| Built before 1960 | 18% | 16% |
| Built since 2000 | 22% | 27% |
| Middle year built | 1986 | 1985 |
| Owner-occupied | 81% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.