Key West, FL Radon Levels
Check local Key West radon levels and find certified testing and mitigation professionals to keep your home safe
Key West, FL Radon Facts
EPA Radon Zone
Zone 3 — Low Risk
< 2.0 pCi/L (Zone 3)
County
Monroe County, FL
Zip Code
33040
At the southernmost point of Monroe County and the continental United States, Key West sits on coral limestone bedrock that generally produces minimal radon levels. The historic city features everything from 19th-century conch houses to modern resort developments, most built on elevated foundations. Though radon risk is typically lower in the Keys' coral geology, testing data remains limited for zip code 33040, making baseline testing still advisable for residents.
Key West, FL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Need Radon Mitigation or Testing in Key West?
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Radon FAQ for Key West, FL
What EPA Radon Zone is Key West in?
Key West and the 33040 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 West?
Radon mitigation in Key West 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 West?
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 in Florida with the most user-submitted radon test data, ranked by number of submissions.
| City | Avg User Radon Level | Submissions |
|---|---|---|
| Ocala | 8.06 pCi/L | 17 |
| Naples | 7.08 pCi/L | 12 |
| Gainesville | 7.09 pCi/L | 11 |
| Lakeland | 9.83 pCi/L | 6 |
| Alachua | 10.00 pCi/L | 5 |
| Bradenton | 4.80 pCi/L | 5 |
| Bonita Springs | 9.50 pCi/L | 4 |
| Cape Coral | 5.75 pCi/L | 4 |
| Miami | 5.25 pCi/L | 4 |
| North Port | 5.25 pCi/L | 4 |