Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Scott County, Iowa
EPA puts Scott County in Zone 1, its highest radon zone, and high results are common there: 44.3% of the 3,520 radon tests reported to CDC (2008 to 2017, laboratory totals) came back 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
44.3%
14.2 pts below IA
- Scott
- 44.3%
- Iowa
- 58.5%
3,520 tests, 2008 to 2017
Median result
3.3pCi/L
Below action level
- Scott
- 3.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
3,520
6th of 99 by tests
- Scott
- 3,520
- 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
87 of 99
Lowest quarter
- Scott
- 44.3%
- Sioux
- 84.2%
By share, of 99 with 30+ tests
Read a result for Scott County
Starts at Scott County's median, 3.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.3 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. Scott County's median reported result, 2008 to 2017.
The data
Scott County, At a glance
Scott County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Scott 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 Scott County, 2008 to 2017, laboratory
Under 2 pCi/L: 35%2 to 4 pCi/L: 21%4 pCi/L and above: 44%
Of 3,520 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 1,241 | 35.3% |
| 2 to 4 pCi/L | 719 | 20.4% |
| 4 pCi/L and above | 1,560 | 44.3% |
What these figures count
These are the 3,520 tests reported to CDC for Scott 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).
Scott County, Compared
Scott County radon figures, compared
Calculated by Radon411In Scott County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (1,560 of 3,520) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 8.6 points higher. Across 99 Iowa counties pooled together, 58.5% of tests reached that level, so Scott County runs 14.2 points below its state.
Of 4 neighbours with a figure, all 4 reported a larger share at or above 4 pCi/L; the spread is 46.5% (Muscatine County) to 60.4% (Cedar County). By share, Scott County is 87th of 99 Iowa counties with 30 or more tests for the same period.
Half the tests came in under 3.3 pCi/L and half over it; the single highest reached 57.2 pCi/L. Below the action level, 1,241 tests (35.3%) came in under 2 pCi/L, against 21.8% statewide, and 719 tests (20.4%) fell between 2 and 4, against 19.7% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 44.3% share point the same way here. USGS geology rates 100% of the county's land high radon potential. CDC also counts 530 tests taken after mitigation in Scott County for the same period: tests in homes where a fix was already in.
CDC's ten-year totals for Scott County went from 4,670 tests (2005 to 2014) to 3,520 (2008 to 2017), the share going from 50.5% to 44.3%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Scott County, Geology
The ground under Scott County
PredictedUSGS's geologic map puts all of Scott 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 | 99.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Scott County beside the ground around it
On high-potential ground Scott County is close to Iowa as a whole: 100% of its land against 98.8%. Of the 4 counties that border it, none has as large a share of high-potential ground; Muscatine County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Scott County, Local resources
Radon testing and mitigation in Scott County
Listed radon businesses with an address in Scott 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.
Listed radon professionals by town: Davenport, Bettendorf
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
Scott County, Questions
Questions about radon in Scott County
Are radon levels high in Scott County?
Over the 2008 to 2017 laboratory totals, 44.3% of the radon tests reported to CDC for Scott County, Iowa were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.3 pCi/L. Of 99 Iowa counties with 30 or more tests for the same period, 86 reported a higher share; pooled, the state comes to 58.5%.
Which counties border Scott County?
Scott County borders 4 counties: Rock Island County, IL, Clinton County, IA, Muscatine County, IA and Cedar County, IA.
Products
Scott County, Products
Testing a home in Scott County
In Scott County, 44.3% of 3,520 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 Scott 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
Monitor
EcoQube Flex battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 15 minutes
Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Scott County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Scott County
Explore
Scott County, Bordering counties
Counties bordering Scott County
Calculated by Radon411- Radon levels in Cedar County, IAEPA zone 1
60.4%at or above 4 pCi/L
Median 5.0 pCi/L · 765 tests · 16.1 points above Scott County
- Radon levels in Clinton County, IAEPA zone 1
52.7%at or above 4 pCi/L
Median 4.3 pCi/L · 1,375 tests · 8.4 points above Scott County
- Radon levels in Rock Island County, ILEPA zone 1
48.3%at or above 4 pCi/L
Median 3.8 pCi/L · 3,736 tests · 4.0 points above Scott County
- Radon levels in Muscatine County, IAEPA zone 1
46.5%at or above 4 pCi/L
Median 3.7 pCi/L · 954 tests · 2.2 points above Scott County
Scott County, Cities and towns
Cities and towns in Scott County
Scott County's population has barely moved since 2020: 175,259 residents on July 1, 2025 against 174,599 then, by the Census Bureau's estimates. That works out to 383 people per square mile of land. Davenport alone is home to 100,358 of them, 57.3% of the total. CDC's 3,520 reported tests for 2008 to 2017 work out to 20.1 per 1,000 residents (2025 estimate), close to Iowa's 29.4.
From Davenport to New Liberty, CDC publishes no figure by town: each reads Scott County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Davenport | 100,358 | −1.3% | 57.3% |
| Bettendorf | 40,710 | +4.1% | 23.2% |
| Eldridge | 6,954 | +3.5% | 4.0% |
| Le Claire | 4,741 | +0.7% | 2.7% |
| Durantextends beyond Scott County | 1,800 | −4.1% | Counted whole |
| Blue Grassextends beyond Scott County | 1,703 | +2.2% | Counted whole |
| Walcottextends beyond Scott County | 1,530 | −1.0% | Counted whole |
| Buffalo | 1,146 | −2.1% | 0.7% |
| Princeton | 909 | −1.7% | 0.5% |
| Long Grove | 844 | +1.0% | 0.5% |
| Riverdale | 381 | +0.8% | 0.2% |
| Donahue | 335 | +0.9% | 0.2% |
- McCausland
- Dixon
- Maysville
- Panorama Park
- New Liberty
17 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Scott County is counted whole, so it has no share.
Scott County, Homes
Homes in Scott County
Of Scott County's 78,130 homes, 68% are detached houses, against 72% across Iowa; 18% are in buildings of five or more homes. Half of its homes were built before 1972, close to Iowa's 1971: 33% date from before 1960 and 20% from 2000 or later. 70% of occupied homes are lived in by their owner (Iowa: 72%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Scott County | Iowa |
|---|---|---|
| Housing units | 78,130 | 1,427,175 |
| Detached houses | 68% | 72% |
| In buildings of 5 or more | 18% | 14% |
| Mobile homes | 2% | 3% |
| Built before 1960 | 33% | 39% |
| Built since 2000 | 20% | 21% |
| Middle year built | 1972 | 1971 |
| Owner-occupied | 70% | 72% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.