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 Deer Lodge County, Montana
EPA puts Deer Lodge County in Zone 1, its highest radon zone, and only 13 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
68.9%
Silver Bow County
- Silver Bow
- 68.9%
- Ravalli
- 43.7%
4 of 6 neighbours have 30+ tests, 2006 to 2015
Nearest county
68.9%
Silver Bow County, 23 miles
- Silver Bow
- 68.9%
- Montana
- 47.4%
Share at 4+ pCi/L, 193 tests, 2006 to 2015
Ground above low
100.0%
Level with Montana
- Deer Lodge
- 100.0%
- Montana
- 100.0%
Share of land USGS rates moderate or high potential
Tests reported
16
Too few for a share
- Deer Lodge
- 16
- Needed
- 30
2006 to 2015, laboratory
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Read a result for Deer Lodge 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
Deer Lodge County, At a glance
Deer Lodge County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Deer Lodge 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 Deer Lodge County, 2008 to 2017, laboratory
CDC holds 13 reported tests for Deer Lodge County over the 2008 to 2017 laboratory totals, with a median of 3.4 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Deer Lodge County beside the counties around it is how this page reads it.
What these figures count
Only 13 tests were reported to CDC for Deer Lodge 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).
Deer Lodge County, Compared
Deer Lodge County radon figures, compared
Calculated by Radon411CDC's largest figure for Deer Lodge County rests on 16 tests over the 2006 to 2015 laboratory totals, 6 of them at or above 4 pCi/L, so each test moves its share by 6.3 points and no rank or comparison is drawn from it. Results reached as high as 9.4 pCi/L, with a middle value of 3.5 pCi/L.
Of the counties bordering it, 4 have a figure over the 2006 to 2015 laboratory totals: Silver Bow County reported the largest share at or above 4 pCi/L, 68.9%, and Ravalli County the smallest, 43.7%, with Jefferson County at 66.1% and Beaverhead County at 54.8% between. Farther out, Madison County (76 miles away) at 47.9%, Missoula County (79 miles away) at 48.8% and Lewis and Clark County (80 miles away) at 63.5% have figures too. Pooled across 52 Montana counties, 47.4% of reported tests reached that level; across every county in the country with a figure, 36.3%.
Statewide for the same period, Sheridan County reported the highest share (75.7%) and Hill County the lowest (35.0%). EPA's 1993 map puts Deer Lodge County in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 100% of the county's land high radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Deer Lodge County, Geology
The ground under Deer Lodge County
PredictedUSGS's geologic map puts all of Deer Lodge County's mapped land in one class: high radon potential. All of it lies in the area the map calls Northern Rocky Mountains, 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 |
|---|---|---|---|---|
| Northern Rocky Mountains | Granitic, metaigneous, metasedimentary rocks, valley fill colluvium and alluvium. | High | 13 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Deer Lodge County beside the ground around it
Deer Lodge County has more high-potential ground than Montana as a whole: 100% of its land against 78.5%. Of the 6 counties that border it, none has as large a share of high-potential ground; Granite County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Deer Lodge County, Local resources
Radon testing and mitigation in Deer Lodge County
- Radon Control ProgramRadon Control Program, run by Montana DEQ, does not license radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Montana.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Energy Bureau staff manage the radon information toll-free hotline and distribute subsidized radon test kits to Montana residents.
- Compare kits
- See the Montana directoryNo professionals are listed in Montana yet. The state program can point you to registered testers and mitigators.
What Montana's program says
- Phone
- 1-800-546-0483
- Licensing of radon professionals
Montana DEQ does not certify or require proof of certification for the contractors listed.
What it means
Deer Lodge County, Questions
Questions about radon in Deer Lodge County
Are radon levels high in Deer Lodge County?
Over the 2008 to 2017 laboratory totals, 30.8% of the radon tests reported to CDC for Deer Lodge County, Montana were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.4 pCi/L. Of the counties bordering it, 4 have a figure over the 2006 to 2015 laboratory totals: Silver Bow County reported the largest share at or above 4 pCi/L, 68.9%, and Ravalli County the smallest, 43.7%, with Jefferson County at 66.1% and Beaverhead County at 54.8% between.
Which counties border Deer Lodge County?
Deer Lodge County borders 6 counties: Silver Bow County, Granite County, Jefferson County, Ravalli County, Beaverhead County and Powell County.
Products
Deer Lodge County, Products
Testing a home in Deer Lodge County
No CDC figure names Deer Lodge County; the nearest county with one, Silver Bow County (23 miles away), reported 68.9% of its tests at or above 4 pCi/L over the 2006 to 2015 laboratory totals, the only reading nearby until a test of this home. In Zone 1 the year-round level in Deer Lodge 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
MonitorINKBIRD
INK-RD3 battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
First reading: Within 24 hours
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
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Deer Lodge County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Deer Lodge County
Explore
Deer Lodge County, Bordering counties
Counties bordering Deer Lodge County
Calculated by Radon411- Radon levels in Powell CountyEPA zone 1
73.9%at or above 4 pCi/L
Median 8.5 pCi/L · 23 tests
- Radon levels in Silver Bow CountyEPA zone 1
68.9%at or above 4 pCi/L
Median 6.0 pCi/L · 193 tests
- Radon levels in Jefferson CountyEPA zone 1
66.1%at or above 4 pCi/L
Median 6.4 pCi/L · 62 tests
- Radon levels in Beaverhead CountyEPA zone 1
54.8%at or above 4 pCi/L
Median 4.2 pCi/L · 31 tests
- Radon levels in Ravalli CountyEPA zone 1
43.7%at or above 4 pCi/L
Median 3.2 pCi/L · 964 tests
- Radon levels in Granite CountyEPA zone 1
33.3%at or above 4 pCi/L
Median 1.6 pCi/L · 6 tests
Deer Lodge County, Cities and towns
Cities and towns in Deer Lodge County
The Census Bureau estimates 9,709 residents in Deer Lodge County for July 1, 2025, 284 more than in 2020 (+3.0%). That works out to 13 people per square mile of land. Anaconda-Deer Lodge County, its one incorporated place, has 9,709 residents, 100.0% of the total. Reported testing is thin here: 16 tests over 2006 to 2015, or 1.6 for every 1,000 residents (2025 estimate), where Montana as a whole comes to 7.5.
Anaconda-Deer Lodge County is the one incorporated place here; CDC publishes no figure by town, so it reads Deer Lodge County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Anaconda-Deer Lodge County | 9,709 | +3.0% | 100.0% |
One incorporated place, 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).
Deer Lodge County, Homes
Homes in Deer Lodge County
Deer Lodge County is a place of houses on their own lots: 78% of its 5,506 homes are detached single-family houses, against 69% across Montana. The homes are older than Montana's as a whole: half were built before 1954 (1980 for Montana), and 60% date from before 1960. 69% of occupied homes are lived in by their owner (Montana: 69%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Deer Lodge County | Montana |
|---|---|---|
| Housing units | 5,506 | 522,939 |
| Detached houses | 78% | 69% |
| In buildings of 5 or more | 8% | 9% |
| Mobile homes | 5% | 10% |
| Built before 1960 | 60% | 26% |
| Built since 2000 | 9% | 27% |
| Middle year built | 1954 | 1980 |
| Owner-occupied | 69% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.