Radon in Strafford County, NH

EPA ZONE2

Moderate radon potentialEPA predicts an average indoor screening level of 2 to 4 pCi/L for Zone 2 counties. That's an average across the county, not your home: many Zone 2 homes test above the 4 pCi/L action level.

Source: EPA Map of Radon Zones

Where Zone 2 sits on the radon scale

0248+

Scale in pCi/L. Outlined: EPA's predicted county average for Zone 2. Dashed line at 4: EPA's 4 pCi/L action level.

What testing shows in New Hampshire

39%

of New Hampshire residences tested reported elevated radon (2007–2025 test data).

5.9 pCi/L

estimated average indoor radon in NH, vs. 1.3 pCi/L nationally.

>100 pCi/L

readings have been reported in every NH county.

Source: NH DHHS Radon Program, “Residential Radon Risk: Local Levels and Testing Rates,” data brief, July 2026.

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]

New Hampshire residents can order a free radon test kit through the state program at aelabs.com/nh (per NH DHHS).

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.

Radon in the news

New Hampshire stories (no recent Strafford County stories found)

Rye library closes due to high radon levels: How to test your home for free in NH
Seacoastonline.com · 2025-03-04
Living in the ‘Granite State’ means elevated risk for radon exposure, and in turn, lung cancer
New Hampshire Bulletin · 2023-02-27
NH has elevated risk for radon
Concord Monitor · 2023-02-27
Study: 55 percent of New Hampshire’s groundwater probably has elevated radon levels
NH Business Review · 2023-02-22
New study estimates 55% of New Hampshire’s groundwater probably has elevated radon levels
New Hampshire Public Radio · 2023-02-20

Headlines link to the original publishers via Google News. Updated 2026-10-27.

Nearby counties

All New Hampshire counties