Radon Is Invisible. Your Decision Shouldn't Be.
Maine-Registered, NRPP-Certified Radon Measurement for Buyers, Agents & Property Owners
Maine Radon Testing: Know the Number Before You Close
Radon is a naturally occurring radioactive gas that can enter a home from the soil or groundwater. You cannot see it, smell it, or judge the level during a walk-through—you have to measure it.
MAINE NUMBERS THAT MATTER
• 4.0 pCi/L or higher: the State of Maine advises action.
• 2.0–4.0 pCi/L: consider reducing the level.
• A residence being tested for sale must be tested by a registered radon service provider.
VERIFIED PROFESSIONAL CREDENTIALS
• Michael J. Marquis — Maine Small Residential Principal, PSM50530
• HarborLight Property Inspections, LLC — Maine Small Residential Company, SMC507
• NRPP Certified Radon Measurement Professional 116213-RMP
PRIVATE WELL? Radon in water is a separate test. HarborLight's service on this page is radon-in-air measurement only.
One professional. One continuous monitor. One clear report before closing.
THE $275 MAINE RADON DUE-DILIGENCE PACKAGE
$275 STANDARD RESIDENTIAL RADON TEST
EVERYTHING YOU NEED FOR A CLEARER DECISION
• Professional placement and closed-building-condition guidance
• Continuous radon monitor deployment
• Approximately 48-hour minimum measurement period
• Monitor retrieval and professional data review
• Clear, transaction-ready final report
• Plain-English explanation of the result
• Direct access to Michael if questions come up
NO MAIL-IN KIT. NO GUESSWORK. CLEAR CONTEXT.
THE CLARITY PROMISE
You will not be handed a number and left to figure it out. If your report is not clear, Michael will personally walk you through the result and the practical next questions.
HOW IT WORKS
1. Book as soon as the property and inspection deadline are known.
2. HarborLight deploys the monitor and measures for approximately 48 hours.
3. We retrieve it, review the data, deliver the report, and explain the result.
Inspection periods move fast. Radon measurement needs time. Schedule early so the testing window does not become the decision bottleneck.
Understand the Number. Know the Next Step.
WHAT YOUR RESULT MEANS
• Below 2.0 pCi/L: lower measured level; keep your report and follow recommended retesting.
• 2.0–4.0 pCi/L: Maine advises considering reduction.
• 4.0 pCi/L or higher: Maine advises action. A qualified mitigation professional can explain reduction options.
COMMON QUESTIONS
How long does it take? Approximately 48 hours under proper closed-building conditions.
Where is it placed? In the appropriate lowest livable area.
Can the seller test a home for a sale? Maine requires testing for a residence for sale to be performed by a registered radon service provider.
How often should a home be retested? Maine recommends every 3–5 years, after significant renovation or soil disturbance, and every 2 years for mitigated homes.
Does this include well-water testing? No. Radon in water is a separate test; HarborLight's advertised service here is radon-in-air measurement.
Serving Maine Statewide
HarborLight provides radon testing statewide across Maine, including Portland, South Portland, Scarborough, Biddeford, Saco, and communities throughout the state.
Official guidance source: Maine CDC Radon Program.
Know Before You Close.™ Schedule your $275 radon test today: (207) 245-4688. Related services: mold and moisture assessment. To book, schedule an inspection now.
