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 Lincoln County, Maine
EPA puts Lincoln County in Zone 1, its highest radon zone, and 35.8% of its 246 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
35.8%
1.8 pts below ME
- Lincoln
- 35.8%
- Maine
- 37.6%
246 tests, 2008 to 2017
Median result
2.5pCi/L
Below action level
- Lincoln
- 2.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
246
11th of 16 by tests
- Lincoln
- 246
- Cumberland
- 4,076
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Maine
8 of 16
Middle half
- Lincoln
- 35.8%
- York
- 48.4%
By share, of 16 with 30+ tests
Read a result for Lincoln County
Starts at Lincoln County's median, 2.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.5 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. Lincoln County's median reported result, 2008 to 2017.
The data
Lincoln County, At a glance
Lincoln County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Lincoln County in
USGS geologic potential: Low across 78% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lincoln County, 2008 to 2017, laboratory
Under 2 pCi/L: 40%2 to 4 pCi/L: 24%4 pCi/L and above: 36%
Of 246 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 98 | 39.8% |
| 2 to 4 pCi/L | 60 | 24.4% |
| 4 pCi/L and above | 88 | 35.8% |
What these figures count
These are the 246 tests reported to CDC for Lincoln 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).
Lincoln County, Compared
Lincoln County radon figures, compared
Calculated by Radon411In Lincoln County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (88 of 246) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 0.1 points higher. Across 16 Maine counties pooled together, 37.6% of tests reached that level, so Lincoln County runs 1.8 points below its state.
Of 4 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 29.6% (Knox County) to 32.1% (Waldo County). By share, Lincoln County is 8th of 16 Maine counties with 30 or more tests for the same period.
Half the tests came in under 2.5 pCi/L and half over it; the single highest reached 69.7 pCi/L. Below the action level, 98 tests (39.8%) came in under 2 pCi/L, against 41.4% statewide, and 60 tests (24.4%) fell between 2 and 4, against 21.0% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 35.8% share point the same way here. USGS geology rates 78% of the county's land low radon potential.
CDC's ten-year totals for Lincoln County went from 198 tests (2005 to 2014) to 246 (2008 to 2017), the share going from 38.4% to 35.8%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lincoln County, Geology
The ground under Lincoln County
PredictedMost of the ground under Lincoln County is one class on USGS's geologic map: 78.2% of its land is low radon potential, with 8.8% moderate. The map puts 78.2% of Lincoln County in the area it calls Coastal Province and 8.8% in Moose River Lowlands/Central Maine Lowlands/Central Maine Highlands/Coastal Province. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Coastal Province | Glacial lake clay and marine clay. | Low | 8 | 78.2% |
| Moose River Lowlands/Central Maine Lowlands/Central Maine Highlands/Coastal Province | Heterogeneous metamorphic and igneous rocks. | Moderate | 11 | 8.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lincoln County beside the ground around it
Across Maine 24.5% of the land is rated high; none of Lincoln County's is. Every one of the 4 counties that border it has more high-potential ground, Knox County the most at 60.1%.
The map rates the ground, not the air in any home.
Local help
Lincoln County, Local resources
Radon testing and mitigation in Lincoln County
- Maine Radiation Control ProgramMaine Radiation Control Program, run by Maine Center for Disease Control & Prevention, licenses or certifies radon professionals, and answers questions about testing and mitigation in Maine.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 Maine directoryNo professionals are listed in Maine yet. The state program can point you to registered testers and mitigators.
What Maine's program says
- Phone
- 207-287-5676
- radon.dhhs@maine.gov
- Licensing of radon professionals
Under Maine law, only the owner or occupant of a residence or someone registered with the state to provide these services, may test for radon, install and/or advise on the installation of a radon reduction (mitigation) system.
What it means
Lincoln County, Questions
Questions about radon in Lincoln County
Are radon levels high in Lincoln County?
Over the 2008 to 2017 laboratory totals, 35.8% of the radon tests reported to CDC for Lincoln County, Maine were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.5 pCi/L. Of 16 Maine counties with 30 or more tests for the same period, 7 reported a higher share; pooled, the state comes to 37.6%.
Which counties border Lincoln County?
Lincoln County borders 4 counties: Sagadahoc County, Knox County, Kennebec County and Waldo County.
Products
Lincoln County, Products
Testing a home in Lincoln County
In Lincoln County, 35.8% of 246 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 37.6% pooled across Maine. In Zone 1 the year-round level in Lincoln 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
MonitorAEGTEST
HOUND-1011S rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Lincoln County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Lincoln County
Explore
Lincoln County, Bordering counties
Counties bordering Lincoln County
Calculated by Radon411- Radon levels in Waldo CountyEPA zone 2
32.1%at or above 4 pCi/L
Median 2.3 pCi/L · 209 tests · 3.7 points below Lincoln County
- Radon levels in Kennebec CountyEPA zone 1
30.3%at or above 4 pCi/L
Median 2.1 pCi/L · 696 tests · 5.5 points below Lincoln County
- Radon levels in Sagadahoc CountyEPA zone 2
30.0%at or above 4 pCi/L
Median 2.1 pCi/L · 283 tests · 5.8 points below Lincoln County
- Radon levels in Knox CountyEPA zone 2
29.6%at or above 4 pCi/L
Median 2.3 pCi/L · 287 tests · 6.2 points below Lincoln County
Lincoln County, Residents
Who lives in Lincoln County
The Census Bureau estimates 36,595 residents in Lincoln County for July 1, 2025, 1,351 more than in 2020 (+3.8%). That works out to 80 people per square mile of land. CDC's 246 reported tests for 2008 to 2017 work out to 6.7 per 1,000 residents (2025 estimate), close to Maine's 8.4.
Census lists no incorporated place in Lincoln County: every home in it reads the county's figures.
Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).
Lincoln County, Homes
Homes in Lincoln County
Lincoln County is a place of houses on their own lots: 84% of its 23,810 homes are detached single-family houses, against 70% across Maine. Half of its homes were built before 1977, close to Maine's 1976: 34% date from before 1960 and 19% from 2000 or later. Owners live in 84% of the occupied homes (Maine: 74%), so for most households a test and a fix are their own to order.
| Homes | Lincoln County | Maine |
|---|---|---|
| Housing units | 23,810 | 746,552 |
| Detached houses | 84% | 70% |
| In buildings of 5 or more | 2% | 9% |
| Mobile homes | 7% | 8% |
| Built before 1960 | 34% | 35% |
| Built since 2000 | 19% | 20% |
| Middle year built | 1977 | 1976 |
| Owner-occupied | 84% | 74% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.