Marco Island, FL Radon Mitigation and Testing

Q: What is the average radon level in Marco Island, FL?

Based on 1 user-submitted tests, the average radon level is 5.00 pCi/L.

Q: What EPA Radon Zone is Marco Island in?

Marco Island is in Collier County, EPA Zone 3.

Q: How much does radon mitigation cost in Marco Island?

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

Avg: 5.00 pCi/L

Collier County

EPA Zone 3

1 user test

Situated in Collier County within the Naples Metro area, Marco Island shows moderate radon activity with an average reading of 5.0 pCi/L exceeding the EPA threshold. Despite Florida's generally low radon risk, this barrier island community's single test result suggests individual properties can vary significantly. Residents in zip code 34145 should test their homes, particularly considering the area's unique coastal foundation requirements.

5.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Marco Island, FL. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Marco Island, FL Radon Mitigation

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

Marco Island, FL Radon Testing

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

Marco Island, Florida Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Marco Island, FL	0-20 Years	No Basement/All Slab	Jul 2025

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

Marco Island Radon Facts

Key details about the radon risk profile for Marco Island and the 34145 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Collier County, FL

Zip Code

34145

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

5.00 pCi/L

User Tests Submitted

Marco Island and the 34145 zip code are located in Collier County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Marco Island, FL

What is the average radon level in Marco Island, FL?

Based on 1 user-submitted test, the average radon level in Marco Island is 5.00 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 Marco Island in?

Marco Island and the 34145 zip code are in Collier County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Marco Island?

Radon mitigation in Marco Island 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 Marco Island?

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 Florida

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Ocala	8.31 pCi/L	16
Gainesville	7.09 pCi/L	11
Naples	7.00 pCi/L	11
Lakeland	9.83 pCi/L	6
Bradenton	4.80 pCi/L	5
Alachua	11.50 pCi/L	4
Cape Coral	5.75 pCi/L	4
Miami	5.25 pCi/L	4
North Port	5.25 pCi/L	4
Venice	5.25 pCi/L	4
Tallahassee	4.75 pCi/L	4
Orlando	4.25 pCi/L	4
Valrico	8.33 pCi/L	3
Bonita Springs	6.67 pCi/L	3
Lithia	5.00 pCi/L	3
Sarasota	4.00 pCi/L	3
Estero	6.50 pCi/L	2
Boynton Beach	20.00 pCi/L	1
Fort Lauderdale	14.00 pCi/L	1
Miami Beach	10.00 pCi/L	1