Mesa, AZ Radon Mitigation and Testing

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

Based on 5 user-submitted tests, the average radon level is 6.40 pCi/L.

Q: What EPA Radon Zone is Mesa in?

Mesa is in Maricopa County, EPA Zone 2.

Q: How much does radon mitigation cost in Mesa?

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

Avg: 6.40 pCi/L

Maricopa County

EPA Zone 2

5 user tests

Arizona's third-largest city in Maricopa County shows concerning radon levels, with local testing revealing an average of 6.4 pCi/L — significantly exceeding the EPA's 4.0 pCi/L action threshold. Despite the desert climate, Mesa's underlying granite bedrock and uranium-bearing formations contribute to radon accumulation in homes across multiple zip codes. The city's predominantly slab-on-grade construction doesn't eliminate radon risk, particularly in areas where bedrock is closer to the surface.

6.40

pCi/L average

Above EPA Action Level

Based on 5 user-submitted radon tests for homes in Mesa, AZ. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Mesa, AZ Radon Mitigation

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

Mesa, AZ Radon Testing

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

Mesa, Arizona Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
3 pCi/L	Mesa, AZ	0-20 Years	No Basement/All Slab	Mar 2024
7 pCi/L	Mesa, AZ	0-20 Years	Partial Basement	Feb 2024
6 pCi/L	Mesa, AZ	21-50 Years	No Basement/All Slab	Dec 2023
9 pCi/L	Mesa, AZ	21-50 Years	No Basement/All Crawl Space	May 2021

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

Mesa Radon Facts

Key details about the radon risk profile for Mesa and the 85201 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Maricopa County, AZ

Zip Code

85201

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

6.40 pCi/L

User Tests Submitted

Mesa and the 85201 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 Mesa, AZ

What is the average radon level in Mesa, AZ?

Based on 5 user-submitted tests, the average radon level in Mesa is 6.40 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 Mesa in?

Mesa and the 85201 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 Mesa?

Radon mitigation in Mesa 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 Mesa?

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