Stadtwerke Dillingen/Saar GmbH

Stadtwerke Dillingen/Saar GmbH is a local energy and water utility based in Dillingen/Saar in the German state of Saarland. It supplies electricity, natural gas, drinking water and heat to roughly 21,000 residents across the town of Dillingen/Saar and its districts of Diefflen and Pachten. The company traces its origins to 1902, when an agreement between the Dillinger Hüttenwerke and the municipality of Dillingen secured connections to the ironworks' water pipeline and electric lighting, laying the foundation for an independent central power and water supply. Since then it has operated continuously for more than 120 years. The utility is organised as a GmbH (private limited company). It was converted from a municipal Eigenbetrieb (municipal enterprise) into a GmbH on 1 January 1971. It is jointly owned by the Verkehrs- und Energiebeteiligungsgesellschaft der Stadt Dillingen/Saar mbH (46%), energis GmbH (49%) and the town of Dillingen/Saar itself (5%). A commercial managing director and a technical managing director represent the company, and the supervisory board has 14 members, chaired by the mayor of Dillingen/Saar. In 2010, the Stadtwerke Dillingen/Saar Netzgesellschaft mbH was founded as a separate network company in response to regulatory and legal requirements. Stadtwerke Dillingen positions itself as a reliable and sustainable regional energy supplier with a strong emphasis on personal, on-site customer service. Its product range covers electricity, gas, water, heat, electromobility, heating-cost billing, heat direct service, smoke-detector service, thermographic measurement for PV systems, building thermography, energy certificates, energy consulting, energy services, drinking-water analyses from its own waterworks, LoRaWAN, a baby welcome greeting, an invoice explainer, and a customer portal with the "Meine SWD" app. It serves both private and commercial customers. The company markets a price guarantee for planning security and offers a premium gas tariff with a fixed price. With around 80 employees, the utility operates substantial local infrastructure: more than 130 km of medium-voltage and 259 km of low-voltage cables, plus a low-pressure gas network. Its website highlights that it reliably serves people in Dillingen, Diefflen and Pachten every day. The company remains a municipally anchored, regionally focused supplier rather than a nationwide energy group.

The origins of Stadtwerke Dillingen/Saar lie in an agreement concluded in 1902 between the management of the Dillinger Hüttenwerke (Dillingen ironworks) and the municipality of Dillingen. Under the arrangement, a roughly 40-hectare tract of municipal land between Dillingen and Diefflen, north of the ironworks site and along the Prims river, was exchanged for another property belonging to the ironworks. In return, the town of Dillingen gained connection to the ironworks' water pipeline and electric lighting. This was the first step toward an independent, central electricity and water supply for the community. The founding moment of today's utility is dated to 29 July 1902, when the municipal representatives gave their approval to the project. From that day onward, for more than 120 years, Stadtwerke Dillingen has supplied the town's residents with electricity, gas, drinking water and heat. For much of its early existence the utility operated as a municipal Eigenbetrieb (a municipal enterprise without its own legal personality). On 1 January 1971 it was converted into a GmbH (Gesellschaft mit beschränkter Haftung), giving it a separate legal form. Since then the company has been represented by a commercial managing director and a technical managing director, and it has a supervisory board of 14 members chaired by the mayor of Dillingen/Saar. Ownership is shared among the Verkehrs- und Energiebeteiligungsgesellschaft der Stadt Dillingen/Saar mbH (46%), energis GmbH (49%) and the town of Dillingen/Saar (5%). In 2010, in response to regulatory and legal framework conditions, the Stadtwerke Dillingen/Saar Netzgesellschaft mbH was founded as a separate network company. This structure reflects the broader German practice of legally unbundling network operation from energy sales. The utility today serves around 21,000 residents in Dillingen, Diefflen and Pachten with electricity, natural gas and water, and employs roughly 80 people. Its network includes more than 130 km of medium-voltage cables, 259 km of low-voltage cables and a low-pressure gas network. Over its history it has expanded from basic electricity and water supply into heat, electromobility, energy services, energy consulting and digital offerings such as LoRaWAN and the Meine SWD app.

• 2026

  Announcement of a fixed-price guarantee in the premium gas tariff for the period 1 October 2026 to 31 December 2027.

• 2010

  Founding of Stadtwerke Dillingen/Saar Netzgesellschaft mbH as a separate network company.

• 1971

  Conversion from a municipal Eigenbetrieb of the town of Dillingen/Saar into a GmbH.

• 1902

  Agreement between the Dillinger Hüttenwerke and the municipality of Dillingen; municipal representatives approve the project, marking the founding of the utility.

Regional, municipally anchored energy and water utility emphasising reliability, sustainability, personal on-site service and price guarantees for planning security.

• Electricity supply

• Natural gas supply

• Drinking water supply

• Heat supply

• Electromobility

• Heating-cost billing

• Heat direct service (Wärme-Direkt-Service)

• Smoke-detector service (Rauchwarnmelder-Service)

• Thermographic measurement for PV systems

• Building thermography

• Energy certificate (Energieausweis)

• Energy consulting

• Energy services

• Drinking-water analyses from own waterworks (download)

• LoRaWAN

• Baby welcome greeting

• Invoice explainer

• Customer portal and Meine SWD app

1. 1Stadtwerke Dillingen/Saar – Strom, Gas & Wasserswd-saar.de
2. 2Wir über uns – Stadtwerke Dillingen/Saar seit 1902swd-saar.de
3. 3Stadtwerke Dillingen – Wikidatawikidata.org
4. 4Stadtwerke Dillingen – Wikipedia (German)de.wikipedia.org