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Indoor Air Quality (IAQ) / Mold Testing

Indoor Air Quality (IAQ) testing analyzes airborne mold spores and contaminants that affect health and comfort inside the home. Clark Hill collects indoor and outdoor comparison samples and partners with Priority Labs for accredited lab analysis, identifying mold species, concentrations, and environmental risks.

Why Clark Hill Inspections

Our testing uses laboratory-verified sampling, industry-standard equipment, and an expert reporting process. We help identify hidden mold behind walls, under flooring, and inside HVAC systems — even when no visible mold is present. Reports include spore types, levels, and comparisons to safe environmental baselines.

Importance of this Inspection

Our testing uses laboratory-verified sampling, industry-standard equipment, and an expert reporting process. We help identify hidden mold behind walls, under flooring, and inside HVAC systems — even when no visible mold is present. Reports include spore types, levels, and comparisons to safe environmental baselines.

Benefit to Customer

Results provide clarity about environmental safety, negotiation leverage, documentation for insurance, and protection against potential health hazards — especially important for children, elderly individuals, and those with respiratory conditions.

When To Get A Quote

A. Suspicion of mold or musty odors

Case Study: The Basement Smell That Wasn’t “Just Old House Odor”


When Jenna moved into her new rental in Medford, she noticed a persistent musty smell coming from the basement. She scheduled IAQ testing, and lab results showed elevated mold spores due to hidden growth behind the foundation wall. Early testing helped her landlord fix the issue before it affected her health.


B. Water damage, leaks, or flooding

Case Study: The Leak That Led to Hidden Mold Growth


After a dishwasher leak flooded part of the kitchen in a Newton home, the owners dried everything themselves and assumed the problem was resolved. Months later, they ordered IAQ testing “just to be safe.” Results revealed mold growth inside the wall cavity. Because it was caught early, remediation was quick and prevented further spread.


C. Respiratory symptoms among occupants

Case Study: Mystery Allergies Explained by Air Quality Testing


A family in Arlington noticed their son’s coughing and congestion got worse at home but improved when he stayed with relatives. IAQ testing showed high concentrations of Aspergillus spores circulating through the HVAC system. After professional cleaning and repairs, his symptoms significantly improved.


D. Buying a home with visible or historic water issues

Case Study: The Home With “Old Water Stains”


During a home tour in Watertown, buyers noticed yellow staining on the basement wall that the seller described as “old and fixed.” They ordered IAQ testing during their inspection. Lab results showed elevated spore counts consistent with hidden mold. The buyers negotiated full remediation and a price reduction — avoiding a costly surprise after move-in.


E. Verifying the success of prior mold remediation

Case Study: Ensuring the Remediation Was Truly Complete


After a burst pipe incident, a homeowner in Lexington hired a contractor to perform mold remediation. Before finalizing the insurance claim, she booked IAQ testing to verify results. The lab analysis confirmed normal indoor levels, giving her the documentation she needed and peace of mind that the cleanup was fully successful.

Inspect to Protect Your Home.

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