Police Headquarters
Telephone: 0228 150

Water police
Telephone: 0228 151410 or 151411

Electricity supply in the districts of Bonn and Hardtberg
Stadtwerke Bonn - Energie- und Wasserversorgung Bonn/Rhein-Sieg GmbH
Welschnonnenstrasse 4
53111 Bonn
Telephone: 0228 7111

Electricity supply in the districts of Beuel and Bad Godesberg
Westnetz GmbH
Berggeiststraße 4
50389 Wesseling (main switching line)
Telephone: 0800 4112244 or 0228 7111

Gas supply in the entire city area
Stadtwerke Bonn - Energie- und Wasserversorgung Bonn/Rhein-Sieg GmbH
Welschnonnenstrasse 4
53111 Bonn
Telephone: 0228 7111

High-pressure gas pipelines
Open-Grid-Europe GmbH
Auf dem Romert 18
53604 Bad Honnef
Telephone: 02224 9790

District heating
Stadtwerke Bonn - Energie- und Wasserversorgung Bonn/Rhein-Sieg GmbH
Welschnonnenstraße 4
53111 Bonn
Telephone: 0228 7111

Water supply in the Bonn city area (except Holzlar and Hoholz)
Stadtwerke Bonn - Energie- und Wasserversorgung Bonn/Rhein-Sieg GmbH
Welschnonnenstraße 4
53111 Bonn
Telephone: 0228 7111

Holzlar district
Water supply GmbH
Telephone: 02241 2330

Hoholz district
Water supply association
Telephone: 02241 92190

Thomasberg
On-call service
Telephone: 02241 921933