Sun City, AZ Radon Mitigation and Testing

Q: What EPA Radon Zone is Sun City in?

Sun City is in Maricopa County, EPA Zone 2.

Q: How much does radon mitigation cost in Sun City?

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

Maricopa County

EPA Zone 2

Located in Maricopa County within Arizona's Sonoran Desert (zip code 85370), Sun City sits above alluvial deposits and caliche layers that typically produce low to moderate radon levels. Testing data for this retirement community remains limited, making individual home assessment valuable for residents concerned about radon exposure. Arizona's arid climate and desert soils create conditions where radon accumulation varies significantly based on home ventilation and foundation type.

Sun City, AZ Radon Mitigation

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

Sun City, AZ Radon Testing

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

Sun City Radon Facts

Key details about the radon risk profile for Sun City and the 85351 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Maricopa County, AZ

Zip Code

85351

Predicted Screening Level

2–4 pCi/L (Zone 2)

Sun City and the 85351 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 Sun City, AZ

What EPA Radon Zone is Sun City in?

Sun City and the 85351 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 Sun City?

Radon mitigation in Sun City 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 Sun City?

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