Basement flooding can be classified Category 1, 2, or 3 depending on source and age. Supply-line burst is Category 1. Sump pump failure drawing from saturated soil is Category 2. Sewer backup or rising groundwater carrying surface contaminants is Category 3. Per IICRC S500 §10.5.
Category: Water DamageReviewed: 2026-04-20Source: IICRC S500 §10.5
RP
Ryan PennyIICRC WRT/ASD/AMRT/FSRT/OCT · MI Builder License #2101187907 · Family-owned restoration in West Michigan since 1981.
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