Locations and reports
Radon in Carson City, Nevada
EPA puts Carson City, where Carson City is, in Zone 1, its highest radon zone, and high results are common there: 40.6% of the 731 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
40.6%
17.8 pts above NV
- Carson City
- 40.6%
- Nevada
- 22.8%
Carson City, 1st of 11 in NV, 2008 to 2017
Median result
3.3pCi/L
Below action level
- Carson City
- 3.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Carson City's tests, 2008 to 2017
Nearest county
37.0%
Douglas, 18 miles
- Douglas
- 37.0%
- Carson City
- 40.6%
1,617 tests, 2008 to 2017
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
Carson City, where Carson City is
Tests reported
731
In Carson City
- Carson City
- 731
- Douglas
- 1,617
Reported to CDC before any fix, 2008 to 2017
Read a result for Carson City
Starts at Carson City'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. Carson City's median reported result, 2008 to 2017.
The data
Carson City, What is published
What is published for Carson City
Every figure for Carson City is a county's
Radon data is published by county, not by city, so for Carson City it is Carson City's: its EPA zone (Zone 1) and the 731 tests reported to CDC for 2008 to 2017, laboratory. Only a test tells you about one home.
Carson City covers 145 square miles of land, all of it in Carson City. With 58,571 residents it is thinly built: 405 people to the square mile.
Carson City, Counties
The county Carson City lies in
MeasuredCarson City's EPA zone and the figures CDC publishes for it, 2008 to 2017, laboratory.
Carson CityZone 1Highest predicted potential
- 40.6%
- Reported tests at or above 4 pCi/L
- 3.3 pCi/L
- Median reported result
- 731 tests
- Tests reported to CDC
- None
- Yearly figures on file
Carson City ranks 1st of 11 Nevada counties with 30 or more tests for that period, 17.8 points above the 22.8% pooled across Nevada's counties, 4.9 points above the national pool of 35.7%.
Measured from the middle of Carson City, the nearest counties with a CDC figure for 2008 to 2017, laboratory are Douglas County (18 miles, 37.0% of 1,617 tests), Storey County (24 miles, 17.6% of 34 tests) and Lyon County (31 miles, 30.4% of 303 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 11.1% to 39.1%; the farthest of them, White Pine County, is 260 miles away at 39.1%.
No business in the directory gives Carson City as its address; the Nevada list covers it. Nevada's other cities with a page of their own: Las Vegas and Reno.
The counties around Carson City
By distance from the middle of Carson City; counties with 30 or more tests.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2008 to 2017, laboratory.
Carson City, Geology
The ground under Carson City
PredictedUSGS's geologic map puts all of Carson City's mapped land in one class: moderate radon potential. The map puts 89.1% of Carson City in the area it calls Sierra Nevada and 10.9% in Great Basin. USGS gives the first a radon index of 9 and the second 11, both in the moderate band (9 to 11).
| 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 | 89.1% |
| Great Basin | Sandstone, shale, limestone, mafic volcanic rocks. | Moderate | 11 | 10.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Carson City beside its county and Nevada
All of Carson City, like all of Carson City, is rated moderate. Across Nevada 17.3% of the land is rated high; none of Carson City's is.
The map rates the ground, not the air in any home.
Carson City, Homes
Homes in Carson City
Of Carson City's 24,902 homes, 60% are detached houses, against 60% across Carson City; 20% are in buildings of five or more homes. Half of its homes were built before 1980, close to Carson City's 1980: 8% date from before 1960 and 16% from 2000 or later. 63% of occupied homes are lived in by their owner (Carson City: 63%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Carson City | Carson City | Nevada |
|---|---|---|---|
| Housing units | 24,902 | 24,902 | 1,307,338 |
| Detached houses | 60% | 60% | 60% |
| In buildings of 5 or more | 20% | 20% | 22% |
| Mobile homes | 9% | 9% | 6% |
| Built before 1960 | 8% | 8% | 5% |
| Built since 2000 | 16% | 16% | 40% |
| Middle year built | 1980 | 1980 | 1996 |
| Owner-occupied | 63% | 63% | 59% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.
Local help
Carson City, Local resources
Local resources for Carson City
Who to ask in Nevada: its radon program, test kits and professionals.
- Nevada Radon Education ProgramRun by University Of Nevada, Reno.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
The program offers literature, maps, educational presentations and low-cost radon test kits.
- Compare kits
- Professionals in NevadaRadon testers and mitigators in Nevada, each with how its listing was checked.
The program's own words on licensing are on the Nevada page.
What it means
Carson City, Questions
Questions about radon in Carson City
What radon zone is Carson City in?
Carson City has no zone of its own: it shares Carson City's, Zone 1, the map's highest class: a predicted county average above 4 pCi/L.
What are radon levels in Carson City?
High results are ordinary around Carson City: 40.6% of the 731 tests reported from Carson City for 2008 to 2017 (laboratory totals) were at or above 4 pCi/L, the level at which EPA says to fix a home. The median reported result was 3.3 pCi/L.
Should I test my home in Carson City?
Yes. Carson City reported about 297 of its 731 tests at or above 4 pCi/L. That is above Nevada's pooled 22.8%, and ranks Carson City 1st of the 11 Nevada counties with 30 or more tests. Which homes they were, no map can say. How to test a home.
What ground is Carson City built on, as far as radon goes?
89.1% of Carson City sits on what USGS's map calls "Sierra Nevada", rated moderate for radon potential, radon index 9; another 10.9% is "Great Basin", in the same class.
Is radon higher in the counties around Carson City?
Lower: none of the 8 nearest counties with a figure matches Carson City's 40.6%. The closest to it is White Pine County (39.1%, 260 miles off); the lowest is Nye County (11.1%, 193 miles off).
The answers use the published figures of Carson City, the county Carson City lies in.
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