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Water Usage Effectiveness · WUE

Liters of water consumed per kWh of IT energy; the water-efficiency companion to PUE.

Current numbers

500 kWEED Article 12 reporting threshold; PUE+WUE+ERF+REF filed annually by 15 May to the EU databaseas of 2026 · register ↗

Parts 2/3/6/8/9ISO/IEC 30134 KPIs: PUE, REF, ERF, CUE, WUE (Part 4 ITEEsv for server efficiency)as of 2026 · register ↗

9 partsISO/IEC 30134 KPI family in active use (PUE, REF, ITEEsv, ITEUsv, ERF, CER, CUE, WUE + overview)as of 2026 · register ↗