Saint Johns, AZ Radon Mitigation and Testing

Q: What EPA Radon Zone is Saint Johns in?

Saint Johns is in Apache County, EPA Zone 2.

Q: How much does radon mitigation cost in Saint Johns?

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

Apache County

EPA Zone 2

Located in eastern Arizona's Apache County on the Colorado Plateau, Saint Johns falls within EPA Zone 2 with moderate radon potential expected across the 85936 zip code. Current testing data remains insufficient for this high-desert community. Arizona's diverse geology, ranging from volcanic rocks to sedimentary formations, combined with the area's mix of older adobe-style homes and newer construction, makes professional radon testing valuable for determining individual property exposure levels.

Saint Johns, AZ Radon Mitigation

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

Saint Johns, AZ Radon Testing

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

Saint Johns Radon Facts

Key details about the radon risk profile for Saint Johns and the 85936 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Apache County, AZ

Zip Code

85936

Predicted Screening Level

2–4 pCi/L (Zone 2)

Saint Johns and the 85936 zip code are located in Apache 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 Saint Johns, AZ

What EPA Radon Zone is Saint Johns in?

Saint Johns and the 85936 zip code are in Apache 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 Saint Johns?

Radon mitigation in Saint Johns 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 Saint Johns?

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