Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Yavapai County, Arizona
EPA puts Yavapai County in Zone 2, its middle radon zone, and 16.2% of its 265 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
16.2%
0.6 pts below AZ
- Yavapai
- 16.2%
- Arizona
- 16.8%
265 tests, 2008 to 2017
Median result
1.6pCi/L
Below action level
- Yavapai
- 1.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
265
4th of 6 by tests
- Yavapai
- 265
- 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
3 of 6
Middle half
- Yavapai
- 16.2%
- Coconino
- 30.0%
By share, of 6 with 30+ tests
Read a result for Yavapai County
Starts at Yavapai County's median, 1.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.6 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. Yavapai County's median reported result, 2008 to 2017.
The data
Yavapai County, At a glance
Yavapai County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Yavapai County is a
USGS geologic potential: Moderate across 90% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Yavapai County, 2008 to 2017, laboratory
Under 2 pCi/L: 58%2 to 4 pCi/L: 26%4 pCi/L and above: 16%
Of 265 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 153 | 57.7% |
| 2 to 4 pCi/L | 69 | 26.0% |
| 4 pCi/L and above | 43 | 16.2% |
What these figures count
These are the 265 tests reported to CDC for Yavapai 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).
Yavapai County, Compared
Yavapai County radon figures, compared
Calculated by Radon411Yavapai County's 265 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.6 pCi/L and a maximum of 103.9 pCi/L, and 16.2% reached 4 pCi/L. Arizona as a whole (13 Arizona counties, pooled) comes to 16.8%: 0.6 points higher than here.
Among its state's counties it ranks 3rd of 6 Arizona counties with 30 or more tests for the same period. Statewide for the same period, Coconino County reported the highest share (30.0%) and Mohave County the lowest (4.1%).
Below the action level, 153 tests (57.7%) came in under 2 pCi/L, against 60.1% statewide, and 69 tests (26.0%) fell between 2 and 4, against 23.2% statewide. CDC's ten-year totals for Yavapai County went from 200 tests (2005 to 2014) to 265 (2008 to 2017), the share going from 18.5% to 16.2%.
EPA's 1993 zone map puts Yavapai County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 90% of the county's land moderate radon potential.
Next door, the shares run from 4.1% in Mohave County to 30.0% in Coconino County, with Mohave County below Yavapai County.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Yavapai County, Geology
The ground under Yavapai County
PredictedMost of the ground under Yavapai County is one class on USGS's geologic map: 90.4% of its land is moderate radon potential, with 9.6% low. The map puts 77.3% of Yavapai County in the area it calls Transition Zone and 13.1% in Colorado Plateau, with one smaller area beside them. USGS gives the first a radon index of 10 and the second 9, both in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Transition Zone | Precambrian igneous, metamorphic and sedimentary rocks and Tertiary volcanic rocks. | Moderate | 10 | 77.3% |
| Colorado Plateau | Paleozoic sadstone, shale, and limestones, some Precambrian gneiss, metasedimentary rocks, granites. | Moderate | 9 | 13.1% |
| 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 | 9.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Yavapai County beside the ground around it
Across Arizona 0.1% of the land is rated high; none of Yavapai County's is. Of the 5 counties that border it, 2 have more moderate-potential ground, Gila County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Yavapai County, Local resources
Radon testing and mitigation in Yavapai County
- 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
Yavapai County, Questions
Questions about radon in Yavapai County
Are radon levels high in Yavapai County?
Over the 2008 to 2017 laboratory totals, 16.2% of the radon tests reported to CDC for Yavapai County, Arizona were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.6 pCi/L. Of 6 Arizona counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 16.8%.
Which counties border Yavapai County?
Yavapai County borders 5 counties: Coconino County, Maricopa County, Mohave County, La Paz County and Gila County.
Products
Yavapai County, Products
Testing a home in Yavapai County
In Yavapai County, 16.2% of 265 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 Yavapai County; a long-term test tells the year-round average.
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
Monitor
RadonPro Wi-Fi radon monitor with a built-in Geiger counter
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Yavapai County, Bordering counties
Counties bordering Yavapai County
Calculated by Radon411- Radon levels in Gila CountyEPA zone 2
64.7%at or above 4 pCi/L
Median 5.7 pCi/L · 17 tests · 48.5 points above Yavapai County
- Radon levels in Coconino CountyEPA zone 2
30.0%at or above 4 pCi/L
Median 2.3 pCi/L · 273 tests · 13.8 points above Yavapai County
- Radon levels in Maricopa CountyEPA zone 2
17.4%at or above 4 pCi/L
Median 1.6 pCi/L · 2,393 tests · 1.2 points above Yavapai County
- Radon levels in Mohave CountyEPA zone 2
4.1%at or above 4 pCi/L
Median 0.2 pCi/L · 49 tests · 12.1 points below Yavapai County
- Radon levels in La Paz CountyEPA zone 2
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Yavapai County, Cities and towns
Cities and towns in Yavapai County
Yavapai County is growing: the Census Bureau puts it at 252,552 residents on July 1, 2025, up 6.5% from 237,223 in 2020. That works out to 31 people per square mile of land. Peoria, the largest place on its list (200,881 residents in all), extends beyond Yavapai County, so no share of the total is worked out for it. Testing is reported here more often than across the state: CDC's 265 reported tests for 2008 to 2017 come to 1.0 for every 1,000 residents (2025 estimate), against 0.5 for Arizona.
From Peoria to Jerome, CDC publishes no figure by town: each reads Yavapai County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Peoriaextends beyond Yavapai County | 200,881 | +4.6% | Counted whole |
| Prescott Valley | 52,423 | +11.7% | 20.8% |
| Prescott | 48,420 | +5.0% | 19.2% |
| Chino Valley | 13,832 | +5.5% | 5.5% |
| Cottonwood | 12,709 | +5.0% | 5.0% |
| Camp Verde | 12,581 | +2.3% | 5.0% |
| Sedonaextends beyond Yavapai County | 9,619 | −0.7% | Counted whole |
| Wickenburgextends beyond Yavapai County | 8,305 | +9.9% | Counted whole |
| Clarkdale | 4,806 | +7.6% | 1.9% |
| Dewey-Humboldt | 4,604 | +5.1% | 1.8% |
| Jerome | 452 | −3.0% | 0.2% |
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 Yavapai County is counted whole, so it has no share.
Yavapai County, Homes
Homes in Yavapai County
Of Yavapai County's 124,032 homes, 67% are detached houses, against 64% across Arizona; 18% are mobile homes. Half of its homes were built before 1994, close to Arizona's 1992: 6% 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 | Yavapai County | Arizona |
|---|---|---|
| Housing units | 124,032 | 3,142,443 |
| Detached houses | 67% | 64% |
| In buildings of 5 or more | 7% | 16% |
| Mobile homes | 18% | 10% |
| Built before 1960 | 6% | 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.