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Seffner, FL Radon Levels

Check local Seffner radon levels and find certified testing and mitigation professionals to keep your home safe


Seffner, FL Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
County Hillsborough County, FL
Zip Code 33584
Avg. User Level 11.00 pCi/L
User Tests 1

Positioned in Hillsborough County within the Tampa Bay Metro area, Seffner has recorded an average radon level of 11.0 pCi/L, substantially exceeding EPA guidelines. Florida's limestone bedrock and phosphate deposits can create unexpectedly high radon levels even in typically low-risk regions. Homeowners in zip code 33584 should take these elevated readings seriously and consider professional mitigation.

11.00
pCi/L average
Above EPA Action Level

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

0
4.0 EPA
10+

Seffner, FL Radon Mitigation

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

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Seffner, FL Radon Levels

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

Radon LevelCityHome AgeFoundation
11 pCi/L Seffner, FL 0-20 Years No Basement/All Slab

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

Radon FAQ for Seffner, FL

What is the average radon level in Seffner, FL?
Based on 1 user-submitted test, the average radon level in Seffner is 11.00 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 Seffner in?
Seffner and the 33584 zip code are in Hillsborough 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 Seffner?
Radon mitigation in Seffner 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 Seffner?
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.

CityAvg User Radon LevelSubmissions
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