Karlheinz Friedrichs

Abwassergesellschaft Gelsenkirchen mbH provides sewage treatment services. The company was founded in 1996 and is headquartered in Gelsenkirchen, Germany.

Part of Wasser und Gas Westfalen GmbH & Co. Holding KG, Wasserversorgung Herne GmbH & Co. KG is a provider of energy services, including solar, e-mobility, and heating solutions through their SMART-TEC service brand. The company is based in Herne, Germany. The German company also offers Stadtwerke Ökostrom for operating their cost-effective and climate-neutral heat pumps. The CEOs are Ulrich Koch, Rafael Rüdel. The company was founded in 2005.

Stadtentwaesserung Dresden GmbH provides water-cleaning services. The private company is based in Dresden, Germany.

Stadtwerke Kaarst GmbH supplies natural gas, green electricity, and heat. The private company is based in Kaarst, Germany. The CEOs are Markus Barczik and Stefan Meuser. The German company was founded in 2001.

WMR Wasserbeschaffung und Energieerzeugung Mittlere Ruhr GmbH is a company based in Germany that engages in the supply of water. The private company was founded in 1970 and the CEO is Dirk Waider.

Founded in 1997, Hansewasser Bremen GmbH is a subsidiary of EWE AG that provides wastewater disposal and environmental services. The company is based in Bremen, Germany.

Stadtwerke Haltern am See GmbH is a local energy partner that has been providing energy services for over 90 years. The private company is based in Haltern am See, Germany. The German company's goal is to ensure that their city has a zest for life. The CEOs are Carsten Schier, Bernhard Klocke. The company was founded in 1900.

Wasserwerke Westfalen GmbH is a German water treatment company that provides drinking water to 1.5 million people in the southern Münsterland, middle and eastern Ruhr area, and northern Sauerland. The company prepares water from the Ruhr river in its six waterworks located between Wickede (Ruhr) and Witten. The company is based in Schwerte, Germany and was founded in 2001. The company ensures the quality and freshness of the drinking water and also focuses on environmental management and cooperation with agriculture and energy companies. Wasserwerke Westfalen is a subsidiary of the City of Dortmund. The CEOs are Bernd Heinz and Bernhard Klocke.

ENNI Energie & Umwelt Niederrhein GmbH provides energy supply and management solutions. The firm’s focus areas encompass power generation, electricity distribution, water supply, and natural gas distribution. It engages in technology innovation and development programs, with focus on natural gas heating, thermal and solar development, and electric-powered vehicles. Its also provides clients with energy conservation consulting and technical support services. It offers its solutions to private individuals and commercial businesses. The company is headquartered in Moers, Germany.

Ruhrverband Holding GmbH provides water supply, waste treatment and tourist services. The firm's services include suppling water for drinking, industrial purposes and hydroelectric power production, secure flood water-flow, and treat sewage. The company was founded in 1913 and is headquartered in Essen, Germany.