Glendale, AZ Radon Mitigation and Testing

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

Based on 2 user-submitted tests, the average radon level is 6.50 pCi/L.

Q: What EPA Radon Zone is Glendale in?

Glendale is in Maricopa County, EPA Zone 2.

Q: How much does radon mitigation cost in Glendale?

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

Avg: 6.50 pCi/L

Maricopa County

EPA Zone 2

2 user tests

Spanning multiple zip codes in Maricopa County within the Phoenix Metro area, Glendale shows an average radon level of 6.5 pCi/L based on available testing data, which exceeds the EPA action level of 4.0 pCi/L. The area's desert soils and underlying granite bedrock can contribute to elevated radon levels, particularly in homes with enclosed lower-level spaces or slab-on-grade foundations with cracks. Homeowners across all Glendale zip codes should test their homes and consider mitigation if levels exceed 4.0 pCi/L.

6.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Glendale, AZ. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Glendale, AZ Radon Mitigation

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

Glendale, AZ Radon Testing

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

Glendale, Arizona Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Glendale, AZ	0-20 Years	No Basement/All Slab	Oct 2023
8 pCi/L	Glendale, AZ	21-50 Years	Partial Basement	Apr 2017

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

Glendale Radon Facts

Key details about the radon risk profile for Glendale and the 85301 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Maricopa County, AZ

Zip Code

85301

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

6.50 pCi/L

User Tests Submitted

Glendale and the 85301 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 Glendale, AZ

What is the average radon level in Glendale, AZ?

Based on 2 user-submitted tests, the average radon level in Glendale is 6.50 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 Glendale in?

Glendale and the 85301 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 Glendale?

Radon mitigation in Glendale 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 Glendale?

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