Category 1 water
Category 1 water is clean water from a sanitary source — typically a supply line, water heater, or appliance inlet — that has not yet contacted contaminants.
Cat 1 water is clean water from a fresh-water source. Most materials it touches can dry in place if the response is fast.
The practical reason this term exists.
Category determines whether materials can dry in place or have to come out. Cat 1 is the most forgiving category — drywall and carpet usually survive if response is quick.
Cat 1 doesn't stay Cat 1 forever. The longer water sits, the more it picks up contaminants from the building. Cat 1 becomes Cat 2 in 48-72 hours; Cat 2 becomes Cat 3 within days.
In real life, the term shows up here.
On the restoration crew's scope on day one of a clean-water loss.
On the adjuster's call confirming which category drives the salvageability decisions.
In the field.
EcoClean treats Cat 1 losses with standard extraction and structural drying. Most building materials survive when caught quickly.
If response is delayed beyond 48 hours, the crew re-categorizes — the water is no longer Cat 1 even if the original source was clean.
Questions homeowners ask about category 1 water.
What sources count as Category 1?
Broken supply lines, water heater leaks before contamination, faucet failures, appliance inlet failures. Any clean potable-water source before it has contacted dirty materials.
Can Cat 1 water make carpet salvageable?
Usually yes if caught early — the carpet often survives; the pad typically gets replaced.
Reference material this definition draws from.
- IICRC S500 — Institute of Inspection, Cleaning and Restoration Certification — Standard for Professional Water Damage Restoration
Cited material informs EcoClean’s field practice. Excerpts from copyrighted standards are not reproduced on this page. Nothing on this page is legal, medical, or insurance-coverage advice.
Last reviewed by EcoClean field team — May 16, 2026.
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