0 Best Mold Assessment Pros in Northfield, IL (Verified 2026)

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Illinois Mold Information

Climate Zone

Midwestern Continental

Moderate, fluctuating (45-65% average)

Humidity Level

Moderate, fluctuating (45-65% average)

Common Mold Types

Cladosporium, Alternaria, Aspergillus

Weather Considerations

Fluctuating humidity and severe weather create seasonal mold risks. Basements, crawl spaces, and HVAC systems are common problem areas. Spring flooding and summer humidity spikes require vigilance.