Mold Growth Conditions

Formula and source

(reference page; no compute) Mold-growth conditions: temperature 40-100 °F, RH ≥ 60-70% sustained, organic substrate, time ≥ 24-48 hours. EPA / IICRC S520-2024 thresholds.

EPA 402-K-01-001 (Mold Remediation in Schools and Commercial Buildings) + IICRC S520-2024 (Standard for Professional Mold Remediation) by name.

Audience

This tile is built for restoration and the adjacent professions in the Water Damage and Mold Restoration group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.

Related tools

• PPE Selection
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Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.