Maricopa, AZ Radon Mitigation and Testing

Q: What EPA Radon Zone is Maricopa in?

Maricopa is in Pinal County, EPA Zone 2.

Q: How much does radon mitigation cost in Maricopa?

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

Pinal County

EPA Zone 2

Rapidly growing within Pinal County as part of the Phoenix Metro area, Maricopa sits on Sonoran Desert basin geology with caliche hardpan and alluvial soils that typically produce moderate radon levels. The city's predominantly newer construction features concrete slab foundations and modern building techniques across multiple zip codes including 85138 and 85139. While comprehensive local testing data is limited, the desert geological conditions suggest homeowners should still conduct radon testing for peace of mind.

Maricopa, AZ Radon Mitigation

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

Maricopa, AZ Radon Testing

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

Maricopa Radon Facts

Key details about the radon risk profile for Maricopa and the 85138 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Pinal County, AZ

Zip Code

85138

Predicted Screening Level

2–4 pCi/L (Zone 2)

Maricopa and the 85138 zip code are located in Pinal 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 Maricopa, AZ

What EPA Radon Zone is Maricopa in?

Maricopa and the 85138 zip code are in Pinal 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 Maricopa?

Radon mitigation in Maricopa 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 Maricopa?

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