IICRC S520 Condition Reference

The three S520 Conditions (normal ecology, settled spores, actual growth) in plain English.

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(reference page; no compute) IICRC S520-2024 Condition framework: Condition 1 (normal fungal ecology, the goal state), Condition 2 (settled spores dispersed from a Condition 3 area, no actual growth), Condition 3 (actual growth, active or dormant, visible or hidden). Remediation returns Condition 2 and 3 areas to Condition 1. Original plain-English summary; standard text not reproduced.

IICRC S520-2024 (Standard for Professional Mold Remediation) Condition framework, by section.

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