Can humidity cause mold growth? Yes, high levels of humidity can lead to mold growth. The EP recommends that humidity levels be kept between 30% and 50%. By ProMatcher Staff Updated: 05/15/2024 Get Free Quotes Today! Source: EPA Get Free Quotes Today! Find Local Pros Free Mold Remediation & Removal Cost Estimates Related Questions Is mold exposure bad for your health? What is mold abatement? Is it possible to completely eliminate mold from the inside of my home?Top answer: Never Does drywall mold easily?Top answer: In some cases Where does mold grow?