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
Radon Levels in Ringgold County, Iowa
EPA puts Ringgold County in Zone 1, its highest radon zone, and 28.7% of its 87 reported radon tests (2008 to 2017, laboratory totals) were at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
28.7%
29.8 pts below IA
- Ringgold
- 28.7%
- Iowa
- 58.5%
87 tests, 2008 to 2017
Median result
2.6pCi/L
Below action level
- Ringgold
- 2.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
87
92nd of 99 by tests
- Ringgold
- 87
- Polk
- 10,945
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Iowa
98 of 99
Lowest quarter
- Ringgold
- 28.7%
- Sioux
- 84.2%
By share, of 99 with 30+ tests
Read a result for Ringgold County
Starts at Ringgold County's median, 2.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.6 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Ringgold County's median reported result, 2008 to 2017.
The data
Ringgold County, At a glance
Ringgold County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Ringgold County in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Ringgold County, 2008 to 2017, laboratory
Under 2 pCi/L: 37%2 to 4 pCi/L: 34%4 pCi/L and above: 29%
Of 87 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 32 | 36.8% |
| 2 to 4 pCi/L | 30 | 34.5% |
| 4 pCi/L and above | 25 | 28.7% |
What these figures count
These are the 87 tests reported to CDC for Ringgold County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Ringgold County, Compared
Ringgold County radon figures, compared
Calculated by Radon411Ringgold County's 87 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.6 pCi/L and a maximum of 20.1 pCi/L, and 28.7% reached 4 pCi/L. Iowa as a whole (99 Iowa counties, pooled) comes to 58.5%: 29.8 points higher than here.
Among its state's counties it ranks 98th of 99 Iowa counties with 30 or more tests for the same period. Statewide for the same period, Sioux County reported the highest share (84.2%) and Decatur County the lowest (25.9%).
Below the action level, 32 tests (36.8%) came in under 2 pCi/L, against 21.8% statewide, and 30 tests (34.5%) fell between 2 and 4, against 19.7% statewide. CDC's ten-year totals for Ringgold County went from 81 tests (2005 to 2014) to 87 (2008 to 2017), the share going from 32.1% to 28.7%.
EPA's 1993 zone map puts Ringgold County in Zone 1, a predicted county average above 4 pCi/L. USGS geology rates 100% of the county's land high radon potential.
Next door, the shares run from 25.9% in Decatur County to 65.4% in Adams County, with Decatur County below Ringgold County.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Ringgold County, Geology
The ground under Ringgold County
PredictedUSGS's geologic map puts all of Ringgold County's mapped land in one class: high radon potential. All of it lies in the area the map calls Loess-Covered Drift Plains, to which USGS gives a radon index of 13, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Loess-Covered Drift Plains | Pre-Illinoian and Illinoian glacial deposits, and loess. | High | 13 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Ringgold County beside the ground around it
On high-potential ground Ringgold County is close to Iowa as a whole: 100% of its land against 98.8%. Of the 7 counties that border it, none has as large a share of high-potential ground; Adams County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Ringgold County, Local resources
Radon testing and mitigation in Ringgold County
- Iowa HHS Radon ProgramIowa HHS Radon Program, run by Iowa Department of Health and Human Services, licenses or certifies radon professionals, offers free or discounted test kits and states the rule for disclosing radon when a home is sold, and answers questions about testing and mitigation in Iowa.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
You can reach the Hotline by calling 1-800-383-5992 to order low-cost radon test kits and find answers to your radon questions.
- Compare kits
- Professionals in Iowa185 professionals are listed in Iowa.
What Iowa's program says
- Phone
- (515) 281-4928
- Licensing of radon professionals
Iowa’s radon program approves applications for persons who wish to become certified to perform radon testing or credentialed to perform mitigation and laboratories that provide radon testing devices and analytical services.
- Disclosure when a home is sold or rented
However, per Iowa Code chapters 543B.9 and 543B.18 and Iowa Administrative Code 193E Chapter 14 administered by the Iowa Real Estate Commission, a seller must disclose any known tests for the presence of radon and if yes, provide the date of last report and the result(s).
What it means
Ringgold County, Questions
Questions about radon in Ringgold County
Are radon levels high in Ringgold County?
Over the 2008 to 2017 laboratory totals, 28.7% of the radon tests reported to CDC for Ringgold County, Iowa were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.6 pCi/L. Of 99 Iowa counties with 30 or more tests for the same period, 97 reported a higher share; pooled, the state comes to 58.5%.
Which counties border Ringgold County?
Ringgold County borders 7 counties: Worth County, MO, Union County, IA, Decatur County, IA, Taylor County, IA, Adams County, IA, Clarke County, IA and Harrison County, MO.
Products
Ringgold County, Products
Testing a home in Ringgold County
In Ringgold County, 28.7% of 87 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 58.5% pooled across Iowa. In Zone 1 the year-round level in Ringgold 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 monitors3
See every kit and monitor
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
Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Ringgold County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Ringgold County
Explore
Ringgold County, Bordering counties
Counties bordering Ringgold County
Calculated by Radon411- Radon levels in Adams County, IAEPA zone 1
65.4%at or above 4 pCi/L
Median 6.1 pCi/L · 81 tests · 36.7 points above Ringgold County
- Radon levels in Union County, IAEPA zone 1
61.8%at or above 4 pCi/L
Median 4.9 pCi/L · 131 tests · 33.1 points above Ringgold County
- Radon levels in Taylor County, IAEPA zone 1
60.9%at or above 4 pCi/L
Median 4.6 pCi/L · 235 tests · 32.2 points above Ringgold County
- Radon levels in Clarke County, IAEPA zone 1
45.8%at or above 4 pCi/L
Median 3.5 pCi/L · 120 tests · 17.1 points above Ringgold County
- Radon levels in Harrison County, MOEPA zone 2
29.2%at or above 4 pCi/L
Median 1.9 pCi/L · 24 tests · 0.5 points above Ringgold County
- Radon levels in Decatur County, IAEPA zone 1
25.9%at or above 4 pCi/L
Median 2.5 pCi/L · 85 tests · 2.8 points below Ringgold County
- Radon levels in Worth County, MOEPA zone 2
9.1%at or above 4 pCi/L
Median 1.5 pCi/L · 11 tests · 19.6 points below Ringgold County
Ringgold County, Cities and towns
Cities and towns in Ringgold County
Ringgold County's population has barely moved since 2020: 4,642 residents on July 1, 2025 against 4,641 then, by the Census Bureau's estimates. Spread over its land, that is 8.7 people to the square mile. Its largest town, Mount Ayr, has 1,637 residents, 35.3% of the total. Reported testing is thin here: 87 tests over 2008 to 2017, or 18.7 for every 1,000 residents (2025 estimate), where Iowa as a whole comes to 29.4.
From Mount Ayr to Beaconsfield, CDC publishes no figure by town: each reads Ringgold County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Mount Ayr | 1,637 | +0.9% | 35.3% |
| Diagonal | 333 | −1.5% | 7.2% |
| Clearfieldextends beyond Ringgold County | 278 | +0.4% | Counted whole |
| Kellerton | 242 | −0.4% | 5.2% |
| Tingley | 146 | +6.6% | 3.1% |
| Shannon Cityextends beyond Ringgold County | 71 | −2.7% | Counted whole |
| Redding | 63 | −1.6% | 1.4% |
| Benton | 40 | −2.4% | 0.9% |
| Maloy | 27 | Level | 0.6% |
| Ellston | 21 | Level | 0.5% |
| Beaconsfield | 14 | Level | 0.3% |
11 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 Ringgold County is counted whole, so it has no share.
Ringgold County, Homes
Homes in Ringgold County
Ringgold County is a place of houses on their own lots: 87% of its 2,676 homes are detached single-family houses, against 72% across Iowa. Half of its homes were built before 1972, close to Iowa's 1971: 43% date from before 1960 and 19% from 2000 or later. Owners live in 79% of the occupied homes (Iowa: 72%), so for most households a test and a fix are their own to order.
| Homes | Ringgold County | Iowa |
|---|---|---|
| Housing units | 2,676 | 1,427,175 |
| Detached houses | 87% | 72% |
| In buildings of 5 or more | 2% | 14% |
| Mobile homes | 6% | 3% |
| Built before 1960 | 43% | 39% |
| Built since 2000 | 19% | 21% |
| Middle year built | 1972 | 1971 |
| Owner-occupied | 79% | 72% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.