Top Rated Radon Mitigation Company in Cobb County
Radon Mitigation Marietta, GA - Testing & Remediation
Protecting Cobb County Families From Radon Gas
Marietta and all of Cobb County are classified EPA Zone 1 with average radon levels of 4.5 pCi/L—above the EPA action level. Over 11,000 homes have elevated levels. Our certified radon contractors help Marietta homeowners test, mitigate, and maintain safe indoor air.
Radon in Marietta, Georgia: What Cobb County Homeowners Need to Know
Marietta is the county seat of Cobb County and one of metro Atlanta's largest and most historic cities, with a population exceeding 60,000. The city's charming Marietta Square, diverse neighborhoods, and proximity to Atlanta make it a desirable place to live. However, Cobb County's underlying geology creates significant radon risk throughout the area.
Cobb County is classified as EPA Zone 1—the highest radon risk category—with an average indoor radon level of 4.5 pCi/L, above the EPA's action level of 4.0 pCi/L. Over 11,000 homes in Marietta have radon levels warranting mitigation. The area sits on mixed granite and sedimentary formations containing high uranium concentrations.
Radon is the second leading cause of lung cancer in the United States. Because it's invisible, odorless, and tasteless, radon can accumulate in homes to dangerous levels without any warning. The only way to know if your Marietta home has elevated radon is through professional testing.
Whether you live near historic Marietta Square, in East Cobb, West Cobb, or anywhere in between, your property's radon levels depend on the specific geology beneath your foundation. Testing is the only way to find out.
Cobb County Geology and Radon Risk
Marietta and Cobb County sit within the Piedmont physiographic province on mixed granite and sedimentary formations with high uranium content. According to AARST research, the Powers Ferry metagraywacke formation—which runs through East Cobb and extends into North Fulton—contains significant uranium deposits that appear on National Uranium Resource Evaluation (NURE) maps.
This same geological formation creates high radon risk across East Cobb, extending through Sandy Springs and into Roswell. West Cobb also has elevated radon from related granite and schist formations. The entire county carries Zone 1 designation, indicating that radon testing should be a priority for all Marietta homeowners.
Radon Testing Across Marietta & Cobb County
From historic homes near the Square to new construction in East and West Cobb, every property on Cobb County's uranium-bearing geology faces radon risk.
East Cobb
East Cobb sits directly on the Powers Ferry metagraywacke formation with some of the highest radon potential in metro Atlanta. Neighborhoods like Johnson Ferry, Paper Mill, and Sandy Plains often test above average.
East Cobb's family neighborhoods with finished basements should be tested, as these living spaces are in direct contact with radon-producing geology.
Historic Marietta
The historic neighborhoods surrounding Marietta Square include homes from the 1800s through today. Older foundations with settling cracks and original construction provide multiple radon entry points.
We specialize in mitigation solutions that preserve historic character while providing effective radon reduction.
West Cobb
West Cobb neighborhoods including Whitlock, Lost Mountain, and the Powder Springs border feature granite and schist formations that also produce elevated radon levels.
While geology differs slightly from East Cobb, the entire county is Zone 1 and all areas should be tested.
Schools, Daycares & Commercial
Cobb County Schools is one of Georgia's largest school systems. Children are especially vulnerable to radon exposure. Commercial buildings throughout Marietta should also be tested.
We provide commercial radon testing and mitigation for Marietta schools, daycares, and commercial properties.
Marietta & Cobb County Areas We Serve
Professional Radon Services in Marietta, GA
Comprehensive radon testing, mitigation, remediation, and system maintenance from certified contractors serving Cobb County
Radon Testing
Professional radon testing using continuous radon monitors that record hourly data for the most accurate assessment of your Marietta home's radon levels. Results in 48 hours.
- 48-hour results
- Continuous monitoring
- Detailed hourly data report
Radon Mitigation Systems
Expert radon mitigation and remediation system installation designed for Cobb County's uranium-bearing geology. Sub-slab depressurization systems proven to reduce radon below EPA levels.
- 1-day installation
- Below EPA levels guaranteed
- Post-install verification test
System Repair & Maintenance
Complete radon system repair, fan replacement, and maintenance for existing systems in Marietta. We service all brands and system types to keep your home protected.
- All brands serviced
- Fan replacement
- Performance verification
Commercial Radon Services
Professional radon testing and mitigation for Marietta commercial properties, schools, daycares, and multi-family buildings. Compliance documentation provided.
- Schools & daycares
- Multi-family buildings
- Compliance documentation
Explore Marietta Radon Services
In-depth radon testing and mitigation resources for Cobb County homeowners
Radon Services by Marietta Neighborhood
Why Marietta Homeowners Choose Our Radon Company
Trusted radon contractors and certified professionals serving Cobb County
Cobb County Expertise
We understand Cobb County's unique geology and how it creates elevated radon levels throughout Marietta.
48-Hour Results
Professional radon testing with results in 48 hours. For real estate transactions, we meet inspection timelines.
Verified Results
Every mitigation includes a post-install verification test to confirm radon levels are below the EPA action level.
Free Estimates
We provide free radon mitigation estimates for Marietta homeowners. Know the cost before you commit.
Radon Services in Nearby Cities
We also serve communities surrounding Marietta and Cobb County
Frequently Asked Questions About Radon in Marietta, GA
Common questions from Cobb County homeowners about radon testing and mitigation
Why is radon a significant concern in Marietta and Cobb County?
Marietta sits on mixed granite and sedimentary formations with high uranium content. Cobb County is classified as EPA Zone 1—the highest radon risk category—with an average radon level of 4.5 pCi/L, above the EPA action level of 4.0 pCi/L. According to AARST research, the Powers Ferry metagraywacke formation running through East Cobb contains significant uranium deposits that produce elevated radon throughout the county.
What is the average radon level in Marietta, GA?
Marietta and Cobb County have an average indoor radon level of approximately 4.5 pCi/L, which exceeds the EPA's recommended action level of 4.0 pCi/L. The area is classified as EPA Zone 1 (high risk). Individual homes can test significantly higher—especially in East Cobb—depending on foundation type and proximity to granite formations.
Is East Cobb at higher radon risk than West Cobb?
Both East and West Cobb have elevated radon risk, but East Cobb sits directly on the Powers Ferry metagraywacke formation—the same high-uranium geology that runs through North Fulton. This means East Cobb homes often test higher. However, all of Cobb County is Zone 1, and testing is essential regardless of your specific location within the county.
How much does radon mitigation cost in Marietta?
Radon mitigation systems in Marietta typically cost between $1,200 and $2,500 for standard residential installations. Homes with complex foundations or multiple basement areas may require additional suction points. We provide free estimates so you know the exact cost before any work begins.
Should I test for radon in my historic Marietta home?
Absolutely. Historic homes near Marietta Square and throughout the city often have older foundations with more potential radon entry points—settling cracks, gaps around pipes, and original construction that didn't account for radon. Newer homes face the same geological risk. The EPA recommends testing all homes regardless of age.
How long does radon testing take in Marietta?
Short-term radon tests take 48 to 96 hours and provide a snapshot of your home's radon levels. We use professional continuous radon monitors that record hourly readings. For real estate transactions in Marietta, we offer 48-hour turnaround to keep deals on schedule.
What type of radon mitigation system works best for Marietta homes?
Sub-slab depressurization (SSD) is the most effective method for Marietta homes with basements or slab foundations. For crawl spaces, we use sub-membrane depressurization. Both approaches create negative pressure beneath your foundation to intercept radon before it enters living spaces. Systems can reduce radon by 99% or more.
Do I need radon testing when buying a home in Cobb County?
Yes. Given Cobb County's Zone 1 classification and elevated average radon levels, testing should be part of any home purchase in Marietta. Most buyers' inspections include radon testing. If elevated levels are found, mitigation can typically be negotiated as part of the transaction.
Get Your Marietta Radon Test Quote
Serving all Cobb County communities with top rated radon testing and mitigation services. Contact us today for your free consultation.
Protect Your Marietta Home From Radon
With Zone 1 classification and over 11,000 homes at elevated radon levels, testing your Marietta home is essential. Contact our certified radon contractors today.
Radon Safety Resources
Expert insights and guides to keep you informed
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How Radon Mitigation Systems Work: Complete Technical Guide
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