Radon in Matanuska-Susitna Borough, Alaska
About 1 in 4 homes tested here were at or above the EPA action level.
- Below 2 pCi/L: 52%
- 2 to 4 pCi/L: 24%
- 4 pCi/L or more: 23%
- Median level
- 1.7 pCi/L
- EPA radon zone
- Zone 2
- In Alaska
- 3rd of 4
EPA Zone 2, moderate radon potential (predicted average 2 to 4 pCi/L). The EPA zone map dates from 1993 and is meant for planning; high levels are found in every zone.
What to do next
Test your home
Radon levels vary between neighboring houses, so area data can't tell you your own home's level. A short-term test takes 2 to 7 days in the lowest lived-in floor. A long-term test (90 days or more) gives a more reliable average.
If your result is 4 pCi/L or more, fix it
Most homes are fixed with a sub-slab depressurization system: a pipe and a quiet fan that pull radon from under the foundation and vent it above the roof. We're still collecting real installation prices for Alaska.
Use a certified professional
Look for a professional certified by the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB), or by your state if it certifies radon contractors.
How Matanuska-Susitna Borough compares
Share of homes tested at or above 4 pCi/L, with neighboring counties. Lab data 2008–2017, the only source that covers every state.
| United States | 36% | |
|---|---|---|
| Kenai Peninsula Borough | 25% | |
| Matanuska-Susitna Borough | 23% | |
| Alaska | 17% | |
| Anchorage Municipality | 7% |
Sources
- EPA Map of Radon Zones (public domain).
- CDC Environmental Public Health Tracking Network, radon tests from labs, 2008–2017. Pre-mitigation tests only.
Last updated October 2026. How we calculate these numbers.