Nogales, AZ Radon Mitigation and Testing

Q: What EPA Radon Zone is Nogales in?

Nogales is in Santa Cruz County, EPA Zone 2.

Q: How much does radon mitigation cost in Nogales?

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

Santa Cruz County

EPA Zone 2

Limited radon testing data exists for Nogales in Santa Cruz County, making individual home assessments critical for residents of this border community in zip code 85621. Built in Arizona's Sonoran Desert basin where underlying volcanic and sedimentary formations typically produce lower radon levels, the area's older adobe and concrete block construction may still experience variable readings. Testing remains important for establishing baseline levels, especially in homes with enclosed spaces where radon can concentrate.

Nogales, AZ Radon Mitigation

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

Nogales, AZ Radon Testing

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

Nogales Radon Facts

Key details about the radon risk profile for Nogales and the 85621 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Santa Cruz County, AZ

Zip Code

85621

Predicted Screening Level

2–4 pCi/L (Zone 2)

Nogales and the 85621 zip code are located in Santa Cruz 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 Nogales, AZ

What EPA Radon Zone is Nogales in?

Nogales and the 85621 zip code are in Santa Cruz 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 Nogales?

Radon mitigation in Nogales 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 Nogales?

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