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 Yuba County, California
EPA puts Yuba County in Zone 2, its middle radon zone, and only 7 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
25.0%
Nevada County
- Nevada
- 25.0%
- Placer
- 7.4%
3 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
11.4%
Butte County, 31 miles
- Butte
- 11.4%
- California
- 10.3%
Share at 4+ pCi/L, 35 tests, 2008 to 2017
Ground above low
68.9%
26.2 pts above California
- Yuba
- 68.9%
- California
- 42.7%
Share of land USGS rates moderate or high potential
Tests reported
8
Too few for a share
- Yuba
- 8
- Needed
- 30
2007 to 2016, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Yuba 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
Yuba County, At a glance
Yuba County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Yuba County is a
USGS geologic potential: Moderate across 69% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Yuba County, 2008 to 2017, laboratory
CDC holds 7 reported tests for Yuba County over the 2008 to 2017 laboratory totals, with a median of 0.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Yuba County beside the counties around it is how this page reads it.
What these figures count
Only 7 tests were reported to CDC for Yuba 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).
Yuba County, Compared
Yuba County radon figures, compared
Calculated by Radon411CDC's largest figure for Yuba County rests on 8 tests over the 2007 to 2016 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 12.5 points and no rank or comparison is drawn from it. Results reached as high as 1.7 pCi/L, with a middle value of 0.1 pCi/L.
Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Nevada County reported the largest share at or above 4 pCi/L, 25.0%, and Placer County the smallest, 7.4%, with Butte County at 11.4% between. Farther out, Yolo County (50 miles away) at 2.1%, El Dorado County (56 miles away) at 30.3% and Sacramento County (57 miles away) at 7.7% have figures too. Pooled across 56 California counties, 10.3% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, El Dorado County reported the highest share (30.3%) and Sonoma County the lowest (0.8%). EPA's 1993 map puts Yuba County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 69% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Yuba County, Geology
The ground under Yuba County
PredictedUSGS's geologic map splits Yuba County: 68.9% of its land is moderate radon potential and 31.1% low. The map puts 68.9% of Yuba County in the area it calls Sierra Nevada and 31.1% in Great Valley. USGS gives the first a radon index of 9, in the moderate band (9 to 11), and the second 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Sierra Nevada | Northern Sierra Nevada is underlain primarily by Paleozoic and Mesozoic metamorphic rocks. Granitic rocks predominate in the southern Sierrra Nevada , with lesser Mesozoic metamorphic rocks. | Moderate | 9 | 68.9% |
| Great Valley | Quaternary alluvial gravel, sand, silt, clay. | Low | 8 | 31.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Yuba County beside the ground around it
Across California 0.1% of the land is rated high; none of Yuba County's is. Of the 6 counties that border it, 4 have more moderate-potential ground, Nevada County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Yuba County, Local resources
Radon testing and mitigation in Yuba County
- California Indoor Radon ProgramCalifornia Indoor Radon Program, run by California Department of Public Health, licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in California.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Discounted test kits can be purchased through our partner laboratory, Alpha Energy, for $14.95.
- Compare kits
- Professionals in California4 professionals are listed in California.
What California's program says
- Phone
- 1-800-745-7236
- Radonprogram@cdph.ca.gov
- Licensing of radon professionals
The Radon Program certifies all radon service providers operating in California.
What it means
Yuba County, Questions
Questions about radon in Yuba County
Are radon levels high in Yuba County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Yuba County, California were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Nevada County reported the largest share at or above 4 pCi/L, 25.0%, and Placer County the smallest, 7.4%, with Butte County at 11.4% between.
Which counties border Yuba County?
Yuba County borders 6 counties: Nevada County, Sutter County, Butte County, Placer County, Sierra County and Plumas County.
Products
Yuba County, Products
Testing a home in Yuba County
No CDC figure names Yuba County; the nearest county with one, Butte County (31 miles away), reported 11.4% 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. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Yuba 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
MonitorAEGTEST
HOUND-3786 rechargeable radon monitor with a 3.5-inch color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Yuba County, Bordering counties
Counties bordering Yuba County
Calculated by Radon411- Radon levels in Sutter CountyEPA zone 3
42.9%at or above 4 pCi/L
Median 1.9 pCi/L · 7 tests
- Radon levels in Plumas CountyEPA zone 2
38.1%at or above 4 pCi/L
Median 2.1 pCi/L · 21 tests
- Radon levels in Nevada CountyEPA zone 2
25.0%at or above 4 pCi/L
Median 2.0 pCi/L · 260 tests
- Radon levels in Butte CountyEPA zone 3
11.4%at or above 4 pCi/L
Median 0.8 pCi/L · 35 tests
- Radon levels in Placer CountyEPA zone 2
7.4%at or above 4 pCi/L
Median 1.1 pCi/L · 283 tests
- Radon levels in Sierra CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 1.2 pCi/L · 1 test
Yuba County, Cities and towns
Cities and towns in Yuba County
Yuba County is growing: the Census Bureau puts it at 88,691 residents on July 1, 2025, up 8.2% from 81,996 in 2020. That works out to 140 people per square mile of land. No town dominates: Marysville, the largest, has 12,738 residents, 14.4% of the total. Together its 2 incorporated places hold 19.2% of those residents; the other 80.8% live outside any of them. Reported testing is thin here: 8 tests over 2007 to 2016, or 0.1 for every 1,000 residents (2025 estimate), where California as a whole comes to 0.3.
From Marysville to Wheatland, CDC publishes no figure by town: each reads Yuba County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Marysville | 12,738 | −0.8% | 14.4% |
| Wheatland | 4,267 | +14.7% | 4.8% |
2 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).
Yuba County, Homes
Homes in Yuba County
Of Yuba County's 30,089 homes, 70% are detached houses, against 57% across California; 12% are in buildings of five or more homes. Much of Yuba County is recent building: 33% of its homes have gone up since 2000 and the middle year built is 1985, against 1976 for California. 63% of occupied homes are lived in by their owner (California: 56%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Yuba County | California |
|---|---|---|
| Housing units | 30,089 | 14,532,683 |
| Detached houses | 70% | 57% |
| In buildings of 5 or more | 12% | 24% |
| Mobile homes | 8% | 4% |
| Built before 1960 | 17% | 27% |
| Built since 2000 | 33% | 18% |
| Middle year built | 1985 | 1976 |
| Owner-occupied | 63% | 56% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.