Duncan, AZ Radon Mitigation and Testing

Q: What EPA Radon Zone is Duncan in?

Duncan is in Greenlee County, EPA Zone 2.

Q: How much does radon mitigation cost in Duncan?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Greenlee County

EPA Zone 2

Remote Duncan in Greenlee County sits within EPA Zone 2, reflecting moderate radon potential in Arizona's southeastern mountains. Current testing data for zip code 85534 remains unavailable, though the area's high elevation and volcanic geology can create localized radon variations. Residents should consider testing given the community's isolation and limited regional data.

Duncan, AZ Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Duncan, AZ Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Duncan Radon Facts

Key details about the radon risk profile for Duncan and the 85534 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Greenlee County, AZ

Zip Code

85534

Predicted Screening Level

2–4 pCi/L (Zone 2)

Duncan and the 85534 zip code are located in Greenlee County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Duncan, AZ

What EPA Radon Zone is Duncan in?

Duncan and the 85534 zip code are in Greenlee County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Duncan?

Radon mitigation in Duncan typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Duncan?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Arizona

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Prescott	6.79 pCi/L	14
Scottsdale	7.75 pCi/L	12
Phoenix	5.40 pCi/L	10
Mesa	6.40 pCi/L	5
Flagstaff	6.00 pCi/L	5
Tucson	5.25 pCi/L	4
Payson	6.67 pCi/L	3
Glendale	6.50 pCi/L	2
Peoria	3.00 pCi/L	2
Prescott Valley	4.00 pCi/L	1
Gilbert	3.00 pCi/L	1
Tempe	3.00 pCi/L	1