ACAC COUNCIL-CERTIFIED · IICRC CERTIFIED · INDEPENDENT RADON TESTING SINCE 2009
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SafeAir
✆ Call (678) 460-6953 Request an Inspection
★★★★★ 5.0 · 156 reviews · ACAC & IICRC
SERVICES · POST-MITIGATION

Post-mitigation radon verification testing.

A mitigation system is installed. The contractor says it looks good. Now the question is whether the radon levels in the home have actually dropped. The only way to know is to test the air.

Having the same company that installed the system verify their own work creates a direct financial incentive to confirm success. SafeAir has no relationship with any mitigation contractor, receives no referral fees, and has no stake in the outcome. The result is exactly what the air contains.

Certified results delivered within 48 to 72 hours after the lab receives the device.

SPEAK WITH A CONSULTANT · MON–FRI
(678) 460-6953

Request your inspection

A certified consultant responds within one business day.

No obligation · your details are never shared.

TIMING

When to schedule a post-mitigation test

After initial installation

The EPA recommends waiting at least 24 hours after installation before testing. The system needs time to stabilize and draw radon from the soil consistently. Testing too early can produce a result that doesn’t reflect normal operating conditions.

For periodic re-verification

The EPA recommends retesting every two years even with a system in place. Fans fail. Seals degrade. Foundation conditions change. A system that tested below 2.0 pCi/L three years ago may not be performing the same today.

After a home renovation

Work affecting the basement slab, foundation, crawlspace, or HVAC can disrupt the pressure field the system relies on. Any significant work in those areas warrants a new test.

Seller completed mitigation

If a buyer requested mitigation before closing, independent verification before closing is the only way to confirm the system performs. Relying on the seller’s mitigator to confirm their own installation is not verification.

After fan replacement

A new fan changes system performance. Treat it as a new installation and retest at least 24 hours after the replacement fan is running.

WHY INDEPENDENT VERIFICATION MATTERS

The installer was paid to build it. We were not.

The contractor who installed the mitigation system was paid to build it. Their business depends on satisfied clients and positive word of mouth. That doesn’t mean they’ll falsify a result, but it does mean they have a financial incentive to confirm the system is working. That incentive is a conflict of interest.

SafeAir is not connected to any mitigation contractor. No referral arrangements, no preferred vendor relationships, no financial benefit if the result lands above or below any particular number.

If the system is working, the result confirms it and the homeowner has documented proof. If it is not working, the homeowner knows before the mitigator has left town — and before the problem becomes the next owner’s problem.

For buyers who negotiated mitigation as a condition of sale: an independent post-mitigation test is the only way to confirm the system is actually performing. An installation confirmation from the seller’s contractor tells you a system exists. A certified test result tells you what the air contains.

THE PROCESS

What the verification test looks like

The process follows the same protocol as the original pre-mitigation test. The result should be compared directly against that original test to evaluate how much the system has reduced radon levels.
01

Wait at least 24 hours after the system is installed and running before scheduling.

02

SafeAir places a test device at the lowest livable level, in the same general location as the original test.

03

Closed-house conditions apply for the full test period — windows and exterior doors remain closed, as in the original test.

04

The test runs for 48 hours.

05

SafeAir retrieves the device and ships it to an accredited laboratory.

06

A certified written result is delivered approximately 48 hours after the lab receives the device.

READING THE RESULT

What a successful result looks like

The EPA’s target after mitigation is below 2.0 pCi/L. Most properly installed systems in suitable conditions achieve that level. The EPA action level is 4.0 pCi/L.

A result still above 4.0 pCi/L after mitigation means the system is not performing adequately. The mitigator should be contacted to inspect and adjust the system. After any adjustment, the home should be retested.

SafeAir does not diagnose mitigation systems, recommend repairs, or advise on contractor selection. The test result tells you what the air contains. What you do with that information is your decision.

Below 2.0 pCi/L

EPA’s post-mitigation target. The system is working — and you have documented proof.

Above 4.0 pCi/L
The system is not performing adequately. Contact the mitigator to inspect and adjust, then retest.
READY TO VERIFY YOUR SYSTEM?

Independent testing — with no relationship to your mitigation contractor.

The result Jeremy delivers reflects nothing other than what the test device measured. Certified results in 48 to 72 hours.