TL;DR
Category 1 water is the cleanest class of water loss under the IICRC S500 restoration standard: water from a sanitary source such as a supply line break, faucet overflow, or appliance feed, posing no substantial health risk at the moment of release. The classification drives the response, since structures wetted by it can often be dried in place, with carpet, pad, and drywall salvaged rather than stripped out.
What it means
Category 1 water is the cleanest class of water loss under the IICRC S500 restoration standard: water from a sanitary source such as a supply line break, faucet overflow, or appliance feed, posing no substantial health risk at the moment of release. The classification drives the response, since structures wetted by it can often be dried in place, with carpet, pad, and drywall salvaged rather than stripped out. The clock matters, because clean water degrades to Category 2 within about 48 hours, or faster with heat and contact with soiled materials. Insurance scopes hinge on the category assigned, making prompt documentation of the source valuable to the claim.
Where it sits in the glossary
Category 1 water is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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