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 Mohave County, Arizona
EPA puts Mohave County in Zone 2, its middle radon zone, and most reported tests there come back low, though 4.1% of 49 (2008 to 2017, laboratory totals) reached 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
4.1%
12.7 pts below AZ
- Mohave
- 4.1%
- Arizona
- 16.8%
49 tests, 2008 to 2017
Median result
0.2pCi/L
Below action level
- Mohave
- 0.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
49
6th of 6 by tests
- Mohave
- 49
- Maricopa
- 2,393
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Arizona
6 of 6
Lowest quarter
- Mohave
- 4.1%
- Coconino
- 30.0%
By share, of 6 with 30+ tests
Read a result for Mohave County
Starts at Mohave County's median, 0.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.2 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Mohave County's median reported result, 2008 to 2017.
The data
Mohave County, At a glance
Mohave County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Mohave County is a
USGS geologic potential: Low across 57% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Mohave County, 2008 to 2017, laboratory
Under 2 pCi/L: 84%2 to 4 pCi/L: 12%4 pCi/L and above: 4%
Of 49 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 41 | 83.7% |
| 2 to 4 pCi/L | 6 | 12.2% |
| 4 pCi/L and above | 2 | 4.1% |
What these figures count
These are the 49 tests reported to CDC for Mohave 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.
The figures at the top are for 2008 to 2017 (laboratory totals): a percentage there is a share of radon tests reported to CDC for Mohave County over 2008 to 2017, laboratory, and a percentage in a view below is a share of the tests reported for the year or period it names. It is not a share of homes in Mohave County, and it is not a random sample: it counts only the tests people chose to run and that were reported.
CDC works out the shares and the median over pre-mitigation tests, counting a test not marked as before or after mitigation as one of them (49 for 2008 to 2017, laboratory). The median is the middle result of those tests, not of buildings. CDC also reports the number of buildings tested (24), a different count, so the two totals are not interchangeable.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Mohave County, Compared
Mohave County radon figures, compared
Calculated by Radon411Only 2 of 49 radon tests reported for Mohave County over the 2008 to 2017 laboratory totals reached 4 pCi/L (4.1%). The median result, 0.2 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 9.2 pCi/L.
Across 13 Arizona counties pooled together, 16.8% of tests reached that level, so Mohave County runs 12.7 points below its state. Against the national pool of 35.7%, the gap is 31.6 points lower. Its place in the state: 6th of 6 Arizona counties with 30 or more tests for the same period.
The reported tests do not follow EPA's Zone 2 label for Mohave County (predicted average between 2 and 4 pCi/L): 4.1% of them reached 4 pCi/L, fewer than that label suggests. Of 5 neighbours with a figure, all 5 reported a larger share at or above 4 pCi/L; the spread is 4.5% (San Bernardino County, CA) to 30.0% (Coconino County).
Below the action level, 41 tests (83.7%) came in under 2 pCi/L, against 60.1% statewide, and 6 tests (12.2%) fell between 2 and 4, against 23.2% statewide. USGS geology rates 57% of the county's land low radon potential.
CDC's ten-year totals for Mohave County went from 47 tests (2005 to 2014) to 49 (2008 to 2017), the share going from 4.3% to 4.1%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Mohave County, Geology
The ground under Mohave County
PredictedUSGS's geologic map splits Mohave County: 56.5% of its land is low radon potential and 43.5% moderate. The map puts 55.9% of Mohave County in the area it calls Basin and Range/Sonoran Desert and 32.0% in Colorado Plateau, with 3 smaller areas beside them. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Basin and Range/Sonoran Desert | Quaternary to Tertiary sediments, with uranium-bearing Tertiary volcanic rocks, highly variable volcanic, metamorphic, and sedimentary rocks, and eolian deposits | Low | 8 | 55.9% |
| Colorado Plateau | Paleozoic sadstone, shale, and limestones, some Precambrian gneiss, metasedimentary rocks, granites. | Moderate | 9 | 32.0% |
| Colorado Plateau | Paleozoic and Mesozoic sandstone, shale, limestone. | Moderate | 9 | 6.8% |
| Transition Zone | Precambrian igneous, metamorphic and sedimentary rocks and Tertiary volcanic rocks. | Moderate | 10 | 4.6% |
| Great Basin | Sandstone, shale, limestone, mafic volcanic rocks. | Low | 8 | 0.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Mohave County beside the ground around it
Across Arizona 0.1% of the land is rated high; none of Mohave County's is. Of the 8 counties that border it, 2 have more high-potential ground, Lincoln County, NV the most at 27.1%.
The map rates the ground, not the air in any home.
Local help
Mohave County, Local resources
Local resources in Arizona
Who to ask in Arizona: its radon program, test kits and professionals.
- Arizona's radon programArizona Department of Health ServicesArizona's radon program answers questions about testing, mitigation and the rules in Arizona.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 Arizona directoryNo professionals are listed in Arizona yet. The state program can point you to registered testers and mitigators.
What it means
Mohave County, Questions
Questions about radon in Mohave County
Are radon levels high in Mohave County?
Over the 2008 to 2017 laboratory totals, 4.1% of the radon tests reported to CDC for Mohave County, Arizona were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.2 pCi/L. That is a share of reported tests, not of homes. EPA places Mohave County in Zone 2, moderate predicted potential, a predicted average indoor screening level 2 to 4 pCi/L. Homes with elevated levels occur in all three zones, so the figures describe the area, not your house. Testing is the only way to know the radon level in a specific building.
How do I get a radon test in Mohave County?
EPA says you can test your home yourself or hire a qualified radon test company. No radon testing business listed on Radon411 has an address in Mohave County or names it as a service area yet. The Arizona radon program is the place to ask about certified testers and any test kit offer it runs.
How to test a homeTest kits comparedFree and low-cost kits by stateRadon Action Month checklistArizona radon program
Who does radon mitigation in Mohave County?
Radon411 has no radon business listed for Arizona yet. EPA recommends a qualified contractor for the fix, and some states require a licensed or certified professional. Your state radon program is the place to check whether Arizona requires one.
How radon mitigation worksWhat mitigation costsArizona radon program
What EPA radon zone is Mohave County in?
EPA places Mohave County, Arizona in Zone 2, which EPA describes as moderate predicted potential for the area. A zone is a prediction for the whole county and never determines whether a particular home should be tested. EPA recommends testing every home regardless of zone.
Should I test my home in Mohave County?
Yes. Over the 2008 to 2017 laboratory totals, 4.1% of the radon tests reported to CDC for Mohave County, Arizona were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.2 pCi/L. That is a share of reported tests, not of homes. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. How to test a home, what testing costs.
Which counties border Mohave County?
Mohave County borders 8 counties: Clark County, NV, Yavapai County, AZ, Coconino County, AZ, Washington County, UT, San Bernardino County, CA, La Paz County, AZ, Lincoln County, NV and Kane County, UT. Radon potential follows geology rather than county lines, so a bordering county's report can be relevant.
Products
Mohave County, Products
Testing a home in Mohave County
In Mohave County, 4.1% of 49 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 16.8% pooled across Arizona. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Mohave 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
Monitor
lüft plug-in radon and indoor air quality monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Wi-Fi, Bluetooth
- App only
First reading: Within 90 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Mohave County, Bordering counties
Counties bordering Mohave County
Calculated by Radon411- Radon levels in Kane County, UTEPA zone 2
38.9%at or above 4 pCi/L
Median 2.5 pCi/L · 18 tests · 34.8 points above Mohave County
- Radon levels in Coconino County, AZEPA zone 2
30.0%at or above 4 pCi/L
Median 2.3 pCi/L · 273 tests · 25.9 points above Mohave County
- Radon levels in Lincoln County, NVEPA zone 1
25.0%at or above 4 pCi/L
Median 2.1 pCi/L · 12 tests · 20.9 points above Mohave County
- Radon levels in Yavapai County, AZEPA zone 2
16.2%at or above 4 pCi/L
Median 1.6 pCi/L · 265 tests · 12.1 points above Mohave County
- Radon levels in Washington County, UTEPA zone 2
14.8%at or above 4 pCi/L
Median 1.8 pCi/L · 250 tests · 10.7 points above Mohave County
- Radon levels in Clark County, NVEPA zone 3
8.1%at or above 4 pCi/L
Median 0.9 pCi/L · 2,598 tests · 4.0 points above Mohave County
4.5%at or above 4 pCi/L
Median 0.7 pCi/L · 178 tests · 0.4 points above Mohave County
- Radon levels in La Paz County, AZEPA zone 2
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Mohave County, Cities and towns
Cities and towns in Mohave County
Mohave County is growing: the Census Bureau puts it at 228,102 residents on July 1, 2025, up 6.5% from 214,167 in 2020. That works out to 17 people per square mile of land. Its largest town, Lake Havasu City, has 59,358 residents, 26.0% of the total. Together its 4 incorporated places hold 62.5% of those residents; the other 37.5% live outside any of them. Reported testing is thin here: 49 tests over 2008 to 2017, or 0.2 for every 1,000 residents (2025 estimate), where Arizona as a whole comes to 0.5.
From Lake Havasu City to Colorado City, CDC publishes no figure by town: each reads Mohave County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Lake Havasu City | 59,358 | +3.5% | 26.0% |
| Bullhead City | 43,987 | +6.0% | 19.3% |
| Kingman | 35,829 | +8.9% | 15.7% |
| Colorado City | 3,484 | +40.7% | 1.5% |
4 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).
Mohave County, Homes
Homes in Mohave County
Of Mohave County's 119,593 homes, 63% are detached houses, against 64% across Arizona; 25% are mobile homes. Half of its homes were built before 1994, close to Arizona's 1992: 2% date from before 1960 and 36% from 2000 or later. 74% of occupied homes are lived in by their owner (Arizona: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Mohave County | Arizona |
|---|---|---|
| Housing units | 119,593 | 3,142,443 |
| Detached houses | 63% | 64% |
| In buildings of 5 or more | 6% | 16% |
| Mobile homes | 25% | 10% |
| Built before 1960 | 2% | 8% |
| Built since 2000 | 36% | 35% |
| Middle year built | 1994 | 1992 |
| Owner-occupied | 74% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.