Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Maui County, Hawaii
EPA puts Maui County in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Ground above low
None
Level with Hawaii
- Maui
- 0.0%
- Hawaii
- 0.0%
Share of land USGS rates moderate or high potential
Tests reported
0
None published
A home here needs its own test
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Maui 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
Maui County, At a glance
Maui County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 97% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
No CDC test figures here
CDC has published no radon test figures for Maui County. Only a test tells you the level in a home.
Maui County, Compared
Maui County radon figures, compared
Calculated by Radon411Maui County is in a state CDC's county radon counts do not reach: no Hawaii county has a figure, while 2,669 counties elsewhere do over the 2006 to 2015 laboratory totals. Across every county in the country with a figure (2,669), 36.3% of reported tests reached that level; no Hawaii county contributes to that pool.
EPA's 1993 map puts Maui County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 97% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Maui County, Geology
The ground under Maui County
PredictedUSGS's geologic map puts all of Maui County's mapped land in one class: low radon potential. The map puts 61.3% of Maui County in the area it calls Maui and 20.5% in Molokai, with 2 smaller areas beside them. USGS gives both a radon index of 5, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Maui | Primarily alkalic and tholeiitic basalt, colluvium and alluvium derived from basalt, lesser amounts of marine sediments and carbonate rocks | Low | 5 | 61.3% |
| Molokai | Primarily alkalic and tholeiitic basalt, colluvium and alluvium derived from basalt, lesser amounts of marine sediments and carbonate rocks | Low | 5 | 20.5% |
| Lanai | Primarily alkalic and tholeiitic basalt, colluvium and alluvium derived from basalt, lesser amounts of marine sediments and carbonate rocks | Low | 5 | 11.6% |
| Kahoolawe | Primarily alkalic and tholeiitic basalt, colluvium and alluvium derived from basalt, lesser amounts of marine sediments and carbonate rocks | Low | 5 | 3.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Maui County beside the ground around it
Neither Maui County nor Hawaii as a whole has any land USGS rates above low potential. None of the one county that borders it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Maui County, Local resources
Radon testing and mitigation in Maui County
- Hawaii's radon programHawaii's radon program answers questions about testing, mitigation and the rules where you live.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 Hawaii directoryNo professionals are listed in Hawaii yet. The state program can point you to registered testers and mitigators.
What it means
Maui County, Questions
Questions about radon in Maui County
Are radon levels high in Maui County?
No CDC testing statistics are published here for Maui County, Hawaii yet. No county within 250 miles of Maui County has a CDC figure, so the only comparison is the national pool: 36.3% of reported tests at or above 4 pCi/L.
Which counties border Maui County?
Maui County borders 1 county: Kalawao County.
Products
Maui County, Products
Testing a home in Maui County
No CDC figure names Maui County, and none within 250 miles of it: a test of this home is the only reading it will get. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Maui County.
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
RadonScan-Plus USB-powered radon monitor with Wi-Fi
- 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
Maui County, Bordering counties
Counties bordering Maui County
Calculated by Radon411counties bordering Maui County: 1 of 1
Maui County, Residents
Who lives in Maui County
About 160,592 people live in Maui County by the Census Bureau's estimate for July 1, 2025, 4,170 fewer than in 2020 (−2.5%). That works out to 138 people per square mile of land.
Census lists no incorporated place in Maui County: every home in it reads the county's figures.
Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).
Maui County, Homes
Homes in Maui County
Of Maui County's 72,303 homes, 59% are detached houses, against 54% across Hawaii; 26% are in buildings of five or more homes. Half of its homes were built before 1985, close to Hawaii's 1979: 10% date from before 1960 and 23% from 2000 or later. 65% of occupied homes are lived in by their owner (Hawaii: 63%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Maui County | Hawaii |
|---|---|---|
| Housing units | 72,303 | 564,905 |
| Detached houses | 59% | 54% |
| In buildings of 5 or more | 26% | 31% |
| Mobile homes | 1% | under 1% |
| Built before 1960 | 10% | 15% |
| Built since 2000 | 23% | 20% |
| Middle year built | 1985 | 1979 |
| Owner-occupied | 65% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.