Key Largo, FL Radon Mitigation and Testing

Q: What EPA Radon Zone is Key Largo in?

Key Largo is in Monroe County, EPA Zone 3.

Q: How much does radon mitigation cost in Key Largo?

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

Monroe County

EPA Zone 3

As the northernmost island in the Florida Keys chain, Key Largo in Monroe County sits on coral limestone formations that typically produce lower radon levels. The community features a mix of elevated homes and waterfront properties designed for the subtropical climate. Given the unique geology of the Keys and limited testing data for zip code 33037, homeowners should still consider radon testing to establish baseline readings.

Key Largo, FL Radon Mitigation

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

Key Largo, FL Radon Testing

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

Key Largo Radon Facts

Key details about the radon risk profile for Key Largo and the 33037 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Monroe County, FL

Zip Code

33037

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Key Largo and the 33037 zip code are located in Monroe 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 Key Largo, FL

What EPA Radon Zone is Key Largo in?

Key Largo and the 33037 zip code are in Monroe 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 Key Largo?

Radon mitigation in Key Largo 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 Key Largo?

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