Utility Companies
- AEM Milano, Italy
- Aqualectra, Curaçao, Netherlands Antilles
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- ASM Pavia, Italy
- Brabant Water, Netherlands
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- BWB Berlin
- Delta, Netherlands
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- EDB Belgrade
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- EDCO, Jordan
- Eesti Gas, Estonia
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- EnBW Stuttgart
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- EnBW ODR AG, Ellwangen
- ENELVEN, Venezuela
- EVN (Energieversorgung Niederöstereich), Austria
- evo
- EWE AG, Oldenburg
- EWR AG, Worms
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- FEWA, United Arab Emirates
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- GPZ (Zagreb City Gas), Croatia
- GSW Kamen Bönen Bergkamen
- Guangzhou Water, Guangzhou, China
- infra fürth, Fürth
- KEVAG Koblenzer Elektrizitätswerk und Verkehrs-Aktiengesellschaft, Koblenz
- Komunala Koper, Slovenia
- Lechwerke EW AG, Augsburg
- Mainova AG, Frankfurt
- Municipal Utility Düren
- Municipal Utility Münster
- Municipal Utility Ingolstadt
- Municipal Utility Tuttlingen
- Municipal Utility Viernheim
- Municipal Utility Villingen-Schwenningen
- Municipal Utility Wolfenbüttel
- MVV Energie AG - 24/7 Netze, Mannheim
- PBE, Belgium
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- Pfalzwerke, Ludwigshafen
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- Public Electricity Corporation - Yemen (PEC)
- Schiphol Airport, Netherlands
- SEWA, United Arab Emirats
- VEG Vorarlberger Erdgas GmbH, Austria
- Ville de Luxembourg
- VKW Bregens, Austria
- VSE, Slovak Republic
- Westland Infra, Netherlands
- Wienenergie - Wienstrom, Austria
- Wienenergie - Wiengas, Austria
