Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Washington County, Alabama
EPA puts Washington County in Zone 3, its lowest radon zone, and only 4 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
3.8%
Mobile County
- Mobile
- 3.8%
- Baldwin
- 0.0%
2 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
3.8%
Mobile County, 43 miles
- Mobile
- 3.8%
- Alabama
- 21.9%
Share at 4+ pCi/L, 52 tests, 2008 to 2017
Ground above low
None
64.7 pts below Alabama
- Washington
- 0.0%
- Alabama
- 64.7%
Share of land USGS rates moderate or high potential
Tests reported
4
Too few for a share
- Washington
- 4
- Needed
- 30
2008 to 2017, 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 Washington 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
Washington County, At a glance
Washington 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 Washington County, 2008 to 2017, laboratory
CDC holds 4 reported tests for Washington 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). Washington County beside the counties around it is how this page reads it.
What these figures count
Only 4 tests were reported to CDC for Washington 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).
Washington County, Compared
Washington County radon figures, compared
Calculated by Radon411CDC's largest figure for Washington County rests on 4 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 25.0 points and no rank or comparison is drawn from it. Results reached as high as 1.6 pCi/L, with a middle value of 1.4 pCi/L.
Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Mobile County reported the largest share at or above 4 pCi/L, 3.8%, and Baldwin County the smallest, 0.0%. Farther out, Autauga County (120 miles away) at 17.1%, Montgomery County (130 miles away) at 9.7% and Tuscaloosa County (136 miles away) at 8.5% 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 Washington 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.
Washington County, Geology
The ground under Washington County
PredictedUSGS's geologic map puts all of Washington County's mapped land in one class: low radon potential. The map puts 86.5% of Washington County in the area it calls Coastal Plain and 13.4% in Jackson Prairies. USGS gives the first a radon index of 7 and the second 8, both in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Coastal Plain | Marly sandy clay, chalk, and glauconitic sands. | Low | 7 | 86.5% |
| Jackson Prairies | Sand, marl, clay, and limestone. | Low | 8 | 13.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Washington County beside the ground around it
Across Alabama 14.3% of the land is rated high; none of Washington County's is. None of the 6 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Washington County, Local resources
Radon testing and mitigation in Washington 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
Washington County, Questions
Questions about radon in Washington County
Are radon levels high in Washington County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Washington 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, 2 have a figure over the 2008 to 2017 laboratory totals: Mobile County reported the largest share at or above 4 pCi/L, 3.8%, and Baldwin County the smallest, 0.0%.
Which counties border Washington County?
Washington County borders 6 counties: Clarke County, AL, Greene County, MS, Wayne County, MS, Choctaw County, AL, Mobile County, AL and Baldwin County, AL.
Products
Washington County, Products
Testing a home in Washington County
No CDC figure names Washington County; the nearest county with one, Mobile County (43 miles away), reported 3.8% 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 Washington County.
Test kits and monitors3
See every kit and monitor
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
MonitorKidde
Radon Detector (RAB) battery digital radon detector with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Washington County, Bordering counties
Counties bordering Washington County
Calculated by Radon411- Radon levels in Mobile County, ALEPA zone 3
3.8%at or above 4 pCi/L
Median 0.5 pCi/L · 52 tests
- Radon levels in Clarke County, ALEPA zone 3
0.0%at or above 4 pCi/L
Median 0.4 pCi/L · 1 test
- Radon levels in Choctaw County, ALEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 1 test
- Radon levels in Baldwin County, ALEPA zone 3
0.0%at or above 4 pCi/L
Median 1.0 pCi/L · 31 tests
- Radon levels in Greene County, MSEPA zone 3
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
- Radon levels in Wayne County, MSEPA zone 3
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Washington County, Cities and towns
Cities and towns in Washington County
About 14,822 people live in Washington County by the Census Bureau's estimate for July 1, 2025, 512 fewer than in 2020 (−3.3%). That works out to 14 people per square mile of land. No town dominates: Chatom, the largest, has 1,054 residents, 7.1% of the total. Together its 3 incorporated places hold 11.3% of those residents; the other 88.7% live outside any of them. Reported testing is thin here: 4 tests over 2008 to 2017, or 0.3 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.4.
From Chatom to McIntosh, CDC publishes no figure by town: each reads Washington County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Chatom | 1,054 | −3.6% | 7.1% |
| Millry | 431 | −4.0% | 2.9% |
| McIntosh | 192 | −5.9% | 1.3% |
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).
Washington County, Homes
Homes in Washington County
Of Washington County's 7,774 homes, 71% are detached houses, against 69% across Alabama; 27% are mobile homes. Half of its homes were built before 1983, close to Alabama's 1985: 15% date from before 1960 and 19% from 2000 or later. Owners live in 86% of the occupied homes (Alabama: 70%), so for most households a test and a fix are their own to order.
| Homes | Washington County | Alabama |
|---|---|---|
| Housing units | 7,774 | 2,316,192 |
| Detached houses | 71% | 69% |
| In buildings of 5 or more | under 1% | 12% |
| Mobile homes | 27% | 13% |
| Built before 1960 | 15% | 16% |
| Built since 2000 | 19% | 27% |
| Middle year built | 1983 | 1985 |
| Owner-occupied | 86% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.