Water Category Deterioration Over Time (IICRC S500)

Applies the S500 principle that water category is determined at the time of remediation, not by the source alone.

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Details, formula, and sources

Origin category, elapsed wet time, a warm-environment flag, and contaminant contact return the likely current category. A clean loss left standing or warm reclassifies upward; contaminant contact escalates toward Category 3. When in doubt the higher category is assumed; the restorer and S500 govern.

Reference lookup with threshold comparisons: origin category + elapsed wet hours + warm flag + contaminant-contact flag -> likely current category. Contaminant contact -> Category 3; Category 1 past ~48-72 h (sooner if warm) -> Category 2; otherwise origin.

Category-at-time-of-remediation principle, by name; ANSI/IICRC S500.

Adds the time dimension to the water category: a clean loss left standing, warm, or in contact with contaminated materials degrades to a higher category.

Estimate. AHJ and licensed professional govern.

Field names used by the API: origin_category, elapsed_hours, warm_environment, likely_category

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