Radon in Petersburg Borough, AK

EPA ZONE–

No EPA zone listedEPA's county zone map doesn't list a zone for Petersburg Borough (this area was created or renamed after EPA's map was made). That doesn't mean radon is low here. EPA recommends testing every home.

Source: EPA radon zones spreadsheet

Test your home

A county zone can't tell you what's in your house. Neighbors can have very different readings, so testing is the only way to know.

Short-term test kitCharcoal kit, 2 to 7 days in your lowest lived-in room, then mailed to a lab.
[affiliate slot: test kit]

Long-term test kit90+ days, a better picture of your year-round average.
[affiliate slot: long-term kit]

Digital radon monitorPlug-in or battery monitor that shows levels continuously.
[affiliate slot: monitor, e.g. Airthings]

What to do with your result

Below 2 pCi/L: retest every couple of years or after renovations.
2 to 4 pCi/L: EPA says consider fixing your home.
4 pCi/L or higher: EPA recommends fixing your home. Confirm with a second test, then contact a certified radon mitigation professional. A typical fix is a sub-slab vent fan system.
On a private well? Consider testing your well water for radon too.

Source: EPA A Citizen's Guide to Radon.

Nearby counties

All Alaska counties

Sources

EPA radon zones by county (spreadsheet), public domain
EPA A Citizen's Guide to Radon