Tempe, AZ Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 3.00 pCi/L.

Q: What EPA Radon Zone is Tempe in?

Tempe is in Maricopa County, EPA Zone 2.

Q: How much does radon mitigation cost in Tempe?

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

Avg: 3.00 pCi/L

Maricopa County

EPA Zone 2

1 user test

Tempe's zip code 85281 area in Maricopa County shows an average radon level of 3.0 pCi/L, which falls within EPA recommended ranges but testing remains important for individual homes. The Phoenix metro area's desert geology and typical slab-on-grade construction help keep radon levels moderate. Residents should still test their homes, as readings can vary significantly even within neighborhoods.

3.00

pCi/L average

Below EPA Action Level

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

4.0 EPA

10+

Tempe, AZ Radon Mitigation

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

Tempe, AZ Radon Testing

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

Tempe, Arizona Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
3 pCi/L	Tempe, AZ	21-50 Years	No Basement/All Slab	Mar 2023

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

Tempe Radon Facts

Key details about the radon risk profile for Tempe and the 85281 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Maricopa County, AZ

Zip Code

85281

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

3.00 pCi/L

User Tests Submitted

Tempe and the 85281 zip code are located in Maricopa 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 Tempe, AZ

What is the average radon level in Tempe, AZ?

Based on 1 user-submitted test, the average radon level in Tempe is 3.00 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

What EPA Radon Zone is Tempe in?

Tempe and the 85281 zip code are in Maricopa 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 Tempe?

Radon mitigation in Tempe 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 Tempe?

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