Sierra Vista, AZ Radon Mitigation and Testing

Q: What is the average radon level in Sierra Vista, AZ?

Based on 1 user-submitted tests, the average radon level is 6.00 pCi/L.

Q: What EPA Radon Zone is Sierra Vista in?

Sierra Vista is in Cochise County, EPA Zone 2.

Q: How much does radon mitigation cost in Sierra Vista?

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

Avg: 6.00 pCi/L

Cochise County

EPA Zone 2

1 user test

Located in southeastern Arizona's Cochise County near the Huachuca Mountains, Sierra Vista shows an average radon level of 6.0 pCi/L, which exceeds the EPA action threshold of 4.0 pCi/L. The area's desert basin geology over limestone bedrock contributes to elevated radon potential, making testing essential for all homes in ZIP codes 85635 and 85650.

6.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Sierra Vista, AZ. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Sierra Vista, AZ Radon Mitigation

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

Sierra Vista, AZ Radon Testing

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

Sierra Vista, Arizona Radon Levels

User-submitted radon test readings from homes in the Sierra Vista area.

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Sierra Vista, AZ	0-20 Years	No Basement/All Slab	Apr 2024

Have a radon test result for Sierra Vista? Submit your reading to help other homeowners.

Sierra Vista Radon Facts

Key details about the radon risk profile for Sierra Vista and the 85635 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Cochise County, AZ

Zip Code

85635

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

6.00 pCi/L

User Tests Submitted

Sierra Vista and the 85635 zip code are located in Cochise 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 Sierra Vista, AZ

What is the average radon level in Sierra Vista, AZ?

Based on 1 user-submitted test, the average radon level in Sierra Vista is 6.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Sierra Vista in?

Sierra Vista and the 85635 zip code are in Cochise 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 Sierra Vista?

Radon mitigation in Sierra Vista 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 Sierra Vista?

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