Certified Radon Testing

Radon Gas Inspection & Testing Services

Protect your family from the invisible dangers of radon gas. We offer professional short-term testing and continuous long-term monitoring throughout DC, Maryland, and Northern Virginia.

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Invisible Health Hazard EPA Compliant Testing 90-Day Radon Warranty

Understanding Radon Gas

Radon is a colorless, odorless, radioactive gas produced naturally as uranium decays in soil and rock. It can seep through cracks or openings in a home’s foundation, accumulating indoors over time. Because it has no smell or taste, the only way to detect radon is through professional testing. According to the Environmental Protection Agency (EPA), radon is the second leading cause of lung cancer in the United States — and the leading cause among non-smokers.

How It Enters & What to Expect

How Radon Enters the Home

Radon gas moves upward through the soil and enters through:

  • Cracks in foundations or basement floors
  • Gaps around pipes, drains, or sump pumps
  • Construction joints and crawl spaces
  • Well water (in some cases)

Once inside, radon becomes trapped and builds to unsafe levels. Every type of home — old or new, sealed or drafty — can be affected.

What to Expect During a Test

  • Setup: A certified inspector places specialized, EPA-approved monitoring equipment in key areas of the home.
  • Sampling: Over 48 hours, the system records radon levels under normal living conditions.
  • Analysis: Data are analyzed to determine the home’s average radon concentration in picocuries per liter (pCi/L).
  • Reporting: You’ll receive a detailed digital report with results and next-step recommendations.

Annual Long-Term Radon Monitoring

While a short-term test shows what’s happening now, long-term monitoring gives you continuous insight. The EPA recommends testing every two years, since levels naturally fluctuate due to soil shifts, foundation settling, seasonal temperature changes, and ventilation differences. Our Annual Long-Term Monitoring uses real-time, continuous sensors that record 24-hour averages and provide monthly trend reports.

Feature Short-Term Testing Long-Term Monitoring
Duration 2–7 days Months to 1 year
Accuracy Snapshot of current levels Tracks seasonal and long-term changes
Purpose Initial screening Ongoing health protection
Reports One-time reading Monthly trend reports
Best For Home sale, quick check Annual home health monitoring

Pricing & Options

Short-Term Radon Testing

Est. $200 – $250

  • With Home Inspection: $200
  • Standalone Service: $250

Each test includes our 90-Day Radon Warranty at no additional cost, providing added confidence in your results.

Long-Term Radon Monitoring

Starting at $400

  • 90+ days of continuous monitoring
  • Professional device installation & retrieval
  • Monthly digital trend reports

Results reflect average radon levels over time, providing a much more accurate picture of potential exposure.

Pricing disclosure: Pricing may vary based on location, travel distance, and device availability. Final pricing is calculated and confirmed securely through Spectora.

Frequently Asked Questions

What is radon gas, and why is testing important? +
Radon is a naturally occurring, colorless, and odorless radioactive gas produced from the decay of uranium in soil and rock. It can seep into homes through foundation cracks or openings and accumulate to unsafe levels. The EPA identifies radon as the second leading cause of lung cancer in the U.S., making regular testing a crucial part of maintaining indoor air safety.
How does radon enter my home? +
Radon gas travels upward from the ground and enters homes through cracks in foundations or basement floors, gaps around pipes, sump pumps, or drains, crawl spaces, construction joints, and well water. Even airtight or newly constructed homes can experience high radon levels.
What are safe radon levels? +
The EPA action level for radon is 4.0 picocuries per liter (pCi/L). Homes with levels above this threshold should take corrective action, such as installing a radon mitigation system. However, even lower concentrations (2–4 pCi/L) can pose health risks over time, so monitoring and mitigation are strongly recommended.
How is a radon test performed? +
Our testing process follows EPA-approved protocols. A certified inspector places a continuous monitoring device in the lowest livable area. Over 48 hours, the device measures fluctuating radon levels under normal living conditions. Data are analyzed to determine your home’s average radon concentration, and you receive a detailed digital report.
How much does a radon test cost? +
A short-term radon test is $200 when bundled with a home inspection, or $250 as a standalone service. Every radon inspection includes a 90-Day Radon Warranty at no additional cost.
How long does it take to get results? +
Most short-term radon tests take 48 hours to complete, and results are typically available within 24 hours after retrieval and analysis. You’ll receive a full digital report with actionable recommendations.
What if my radon levels are high? +
If testing reveals elevated levels, our inspectors will explain your results, recommend contacting a certified radon mitigation specialist to install a ventilation system, and provide re-testing options to verify that mitigation successfully reduces radon levels below the EPA threshold.
What’s the difference between short-term and long-term radon testing? +
Short-term testing (2-7 days) provides an accurate snapshot of current levels, ideal for home sales or initial checks. Long-term monitoring (months to 1 year) tracks seasonal trends and provides continuous protection and ongoing health awareness.
Do I need long-term radon monitoring? +
Yes — the EPA recommends testing every two years, as radon levels fluctuate with seasonal and structural changes. Our Long-Term Radon Monitoring Service provides continuous data, monthly reporting, and professional calibration to ensure ongoing air safety and peace of mind.

Protect Your Family from a Silent Threat. Don’t leave your family’s health to chance. Schedule your short-term test or long-term monitoring installation today.

Schedule with Spectora →
Scheduling note: Scheduling, agreements, and payment are completed securely in Spectora. Inspections are paid in advance unless a pay-at-closing agreement is in place.
Call: (227) 238-1717   |   Email: [email protected]

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