Gelsenwasser AG
Gelsenwasser AG is a German regulated infrastructure company founded in 1871, providing water, wastewater, energy, and digital services to municipalities, industry, and residential customers across the Ruhr area and Münsterland, operating nine integrated business fields with over 1,500 employees.
- Company typePublic
- Founded1871
- HeadquartersGelsenkirchen, Germany
- Headcount51–100
- GTM typeB2B and B2C
- OfferingServices
What Gelsenwasser AG does
Gelsenwasser AG is a German infrastructure company headquartered in Gelsenkirchen, founded in 1871 and operating as a public Aktiengesellschaft. The company runs nine interconnected business fields: drinking water supply, wastewater disposal, energy procurement and sales, energy and heating networks, decentralized energy, digital infrastructure, circular economy, municipal utilities (Stadtwerke), and industrial parks. In 2025 it delivered 40 million cubic meters of water, sold approximately 1 TWh of electricity and 1 TWh of gas, and disposed of 5.6 million cubic meters of wastewater across the Ruhr area, Münsterland, and Niederrhein regions of North Rhine-Westphalia. The Group employs over 1,500 people and invested approximately 50 Mio. Euro in 2025.
Gelsenwasser generates revenue primarily through recurring regulated and contracted utility services: usage-based residential water tariffs (2.1217 EUR per 1,000 liters as of January 2025), subscription-based energy and heating supply, and B2B contracts with municipalities and industrial customers for wastewater treatment, network operations, and energy efficiency consulting. Pricing in the core supply area is set by an arbitration committee, providing regulatory stability. Go-to-market operates through enterprise field sales for municipalities and industry, combined with direct-to-consumer channels including online customer portals, customer offices (Kundenbüros), a 24/7 emergency service, and the Erenja consumer energy brand. Notable customers include AGG GELSENKANAL (wastewater for ~265,000 residents in Gelsenkirchen), Stadtwerke Wesel (21% partner since 1999, achieving 21% energy reduction via SIMBA optimization), and Technische Werke Emmerich.
The underlying technology stack combines physical infrastructure (reservoirs Haltern and Hullern, waterworks, treatment plants, energy and heating networks) with a digital layer that includes LoRaWAN IoT networks, smart meters for water/gas/electricity, building automation systems (DDC) with backward compatibility to 1985, and the SIMBA dynamic simulation tool for wastewater plant digital twins. The company holds 100% of GELSENWASSER Energienetze GmbH, operates AWS GmbH for industrial/municipal wastewater, runs Abwassergesellschaft Gelsenkirchen mbH, and holds a 49% stake in GELSEN-NET for fiber internet. The executive board consists of CEO Henning R. Deters (since 2011), Dr. Dirk Waider (since 2013, technical operations), and Dr. Agnes Janda (since October 2025, wastewater, circular economy, digital infrastructure).
Gelsenwasser AG firmographics
Firmographics- Name
- Gelsenwasser AG
- Legal name
- GELSENWASSER AG
- Website
- https://gelsenwasser.de
- Company type
- Public
- Founded year
- 1871
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Gelsenwasser AG is a German regulated infrastructure company founded in 1871, providing water, wastewater, energy, and digital services to municipalities, industry, and residential customers across the Ruhr area and Münsterland, operating nine integrated business fields with over 1,500 employees.
- Ownership category
- akta.pro rank
Gelsenwasser AG industry classification
Industry- Product category
- Multi-Utility Infrastructure Services
- NAICS
- Water, Sewage and Other Systems (2213), Sewage Treatment Facilities (22132), Water Supply and Irrigation Systems (22131), Utilities (221)
- SIC
- Water Supply (4941), Electric, Gas & Sanitary Services (4900), Sanitary Services (4950), Totalizing Fluid Meters & Counting Devices (3824)
- akta.pro primary industry
- Water Supply & Wastewater Utilities Administration (BPAIACAG)
- akta.pro secondary industries
- Water & Wastewater Utility IoT (SCADA, Leak/Quality Monitoring) (EUADAPAK), Advanced Treatment & Purification Utilities (MF/UF, RO, AOP, UV) (EUANAGAD), Water & Wastewater Treatment Plant Equipment (Clarifiers, Aeration, Membrane Systems) (IMAHAEAJ), Monitoring & Control (Dosing Systems, Remote Monitoring, Sensors) (BPABAJAK)
Keywords
Where Gelsenwasser AG is headquartered
LocationHeadquarters
- HQ city
- Gelsenkirchen
- HQ country
- Germany
- HQ region
- Europe
Offices13 records
Markets served
Gelsenwasser AG business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Infrastructure, Personnel, Operations, Technology or R&D, Supply Chain, Marketing or Sales
Revenue model
- Water Supply: Drinking water supply to municipalities and industrial customers, including water treatment, distribution, and related services
- Wastewater Services: Wastewater treatment, sewage sludge utilization, phosphorus recovery, canal infrastructure and sewage plant operations
- Energy Supply: Electricity, gas, and heating energy supply through Erenja brand and direct contracts for residential and commercial customers
- Energy and Heating Networks: Operation of energy and heating networks providing infrastructure for municipalities and industry
- Digital Infrastructure Services: Smart city solutions, IoT services, digital meters and measurement point management
- B2B Solutions and Consulting: Comprehensive solutions for water infrastructure, wastewater, energy efficiency, building automation for municipalities and industrial partners
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Usage-based | Annual | Residential water tariff customers |
Go-to-market motion2 records
Distribution channels5 records
Marketing channels8 records
Gelsenwasser AG product offering
Product offeringCore offering
Gelsenwasser AG is a German infrastructure utility company providing drinking water supply, wastewater treatment, and energy distribution services to municipalities, industrial customers, and residential consumers. The company operates nine interconnected business fields — water, wastewater, energy procurement and sales, energy and heating networks, decentralized energy, digital infrastructure, circular economy, municipal utilities, and industrial parks — enabling holistic infrastructure solutions from a single source. Services span the full value chain from source extraction and treatment through distribution, metering, and customer service, supported by digital infrastructure including LoRaWAN IoT networks and building automation.
Product overview
Gelsenwasser AG is a German infrastructure company offering a portfolio of nine interconnected business fields as a single unified service portfolio. The core offerings include drinking water supply, wastewater disposal (sewer networks and treatment plants), energy sales and generation, energy and heating networks, and decentralized energy solutions. Supporting these are digital infrastructure services (LoRaWAN IoT, smart metering, building automation), circular economy solutions (phosphorus recovery from sewage sludge), and municipal utility and industrial park partnerships. Key products include the Erenja energy brand for end consumers, Automationssysteme for building automation, Kläranlage and Kanal services for wastewater treatment, and comprehensive water infrastructure solutions. The company operates across multiple German states serving municipalities, industry and commerce.
Differentiator
Problem solved
Functional benefit
Products and services
- Drinking Water Supply (Trinkwasserversorgung)
Quantifiable outcome
- Energy savings of over 21% achieved at Kläranlage Wesel through process optimization
- +2 more outcomes
Companies that use Gelsenwasser AG
Customer profileNamed customers6 records
Segments3 records
Ideal customer profiles3 records
Gelsenwasser AG technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Gelsenwasser AG partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered minor and core.
- Gelsenwasser-StiftungminorCorporate foundation established in 2012 supporting non-profit projects in the supply area with focus on educational support for children and youth. Has funded approximately 50 educational projects.
- AWS GmbHcoreAWS GmbH is an over-regional service company in industrial and municipal water and wastewater management, operating as part of the Gelsenwasser Group. Handles wastewater treatment plants for industrial clients including a food processing company in Heppenheim.
- Stadtwerke WeselminorMunicipal utility operating Kläranlage Wesel serving 75,000 residents. Gelsenwasser has been a 21% partner since 1999 providing energetic optimization consulting. Achieved 21% energy reduction through SIMBA simulation-guided process optimization.
- Erenja AG & Co. KGcoreErenja is the eco-energy brand of Gelsenwasser AG serving residential customers in the northern Ruhr region and Münsterland with green electricity and natural gas offerings.
- GELSEN-NETminorRegional IT company offering fiber optic internet services. Gelsenwasser holds 49% stake. GELSEN-NET services are offered alongside Gelsenwasser's energy and water services at customer offices.
- Westfälische Wasser- und Umweltanalytik (WWU)minorEnvironmental analytics partner participating in 'Trinkwasser im Gespräch' industry event with Gelsenwasser experts presenting on water quality topics.
- Technische Werke Emmerich (TWE)minorMunicipal utility in Emmerich receiving Gelsenwasser's wastewater treatment consulting services. Since 2004, cooperation agreement has enabled joint project execution including Rechenanlage (screen system) replacement at Kläranlage Emmerich.
- AGG GELSENKANALcoreEntwässerungsbetriebe Gelsenkirchen - municipal drainage enterprise for which Abwassergesellschaft Gelsenkirchen mbH (part of Gelsenwasser Group) provides wastewater disposal services for approximately 265,000 residents.
- Hochschule Ruhr WestminorUniversity of Applied Sciences partnership for dual study programs in civil engineering, combining academic theory with practical training at Gelsenwasser.
- Westfälische HochschuleminorPartnership for dual study programs in mechanical engineering and industrial engineering, combining practical training at Gelsenwasser with academic studies.
- Stadtentwässerung HerneminorMunicipal sewage disposal partner in dual study program for civil engineering students gaining practical experience in drainage infrastructure.
Scale indicators16 records
Recent moves6 records
Expansion highlights6 records
Gelsenwasser AG competitors and assessment
Company assessmentDirect peers
- Thüga AG: German municipal utilities holding company coordinating a network of Stadtwerke across Germany with shared energy, water, and digital services. Comparable as a multi-utility platform serving municipalities with a federated structure similar to Gelsenwasser's integrated offering.
- Berliner Wasserbetriebe (BWB): Berlin's municipal water and wastewater utility operating integrated water supply and sewage services at large scale. Directly comparable business model of integrated municipal water/wastewater utility in Germany.
- Stadtwerke München (SWM): Munich's municipal multi-utility providing water, energy, heating, and digital services to residential and commercial customers. Closely comparable integrated municipal utility model with diversified business fields.
- Kölner Stadtwerke (RheinEnergie): Cologne-area municipal utility providing water, energy, and heating services. Comparable multi-utility model serving a major German metropolitan region.
- Mainova AG: Frankfurt-area municipal multi-utility supplying electricity, gas, water, and heating. Comparable integrated utility model serving a German metropolitan region with municipal/regional governance.
- Dortmunder Stadtwerke (DSW21): Dortmund municipal utility providing water, energy, and mobility services in the eastern Ruhr area. Comparable municipal multi-utility operating in close geographic proximity to Gelsenwasser's Ruhr-area territory.
Regional players
- Hamburg Wasser: Hamburg's municipal water and wastewater utility serving a major German metropolitan area. Comparable integrated water utility but operating in a different geography (northern Germany).
Broad incumbents
- Veolia Deutschland: German subsidiary of global environmental services giant operating water and wastewater services for municipalities and industry. Comparable as a large-scale water/wastewater service provider in Germany, but as part of a much broader international portfolio.
- E.ON SE: One of Europe's largest energy utilities with German operations in distribution, customer solutions, and energy networks. Overlapping capabilities in energy distribution, digital metering, and municipal utility partnerships, though energy-focused rather than water-focused.
- EnBW Energie Baden-Württemberg: Large German integrated energy utility with water/wastewater activities through subsidiaries. Comparable as a major regulated utility with energy distribution, but focused on southwestern Germany rather than NRW.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
Gelsenwasser AG social profiles
Digital presenceGelsenwasser AG financial estimates
Financial estimateRevenue estimate
Valuation estimate
Gelsenwasser AG leadership team
Management profileNumber of profiles
Profiles3 records
Gelsenwasser AG subsidiaries and ownership
Company hierarchySubsidiaries4 records
Gelsenwasser AG funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Gelsenwasser AG M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Gelsenwasser AG
What does Gelsenwasser AG do?
Gelsenwasser AG is a German infrastructure utility company providing drinking water supply, wastewater treatment, and energy distribution services to municipalities, industrial customers, and residential consumers. The company operates nine interconnected business fields — water, wastewater, energy procurement and sales, energy and heating networks, decentralized energy, digital infrastructure, circular economy, municipal utilities, and industrial parks — enabling holistic infrastructure solutions from a single source. Services span the full value chain from source extraction and treatment through distribution, metering, and customer service, supported by digital infrastructure including LoRaWAN IoT networks and building automation.
Is Gelsenwasser AG a public or private company?
Gelsenwasser AG is a public company. It is classified as public and is currently operating.
When was Gelsenwasser AG founded?
Gelsenwasser AG was founded in 1871. It employs 51 to 100 people.
Where is Gelsenwasser AG based?
Gelsenwasser AG is headquartered in Gelsenkirchen, Germany, in the Europe region.
How does Gelsenwasser AG make money?
Six revenue lines are on record. Water Supply is the primary driver. The others are wastewater Services, energy Supply, energy and Heating Networks, digital Infrastructure Services and B2B Solutions and Consulting.
Who are Gelsenwasser AG's main competitors?
Direct peers on record are Thüga AG, Berliner Wasserbetriebe (BWB), Stadtwerke München (SWM), Kölner Stadtwerke (RheinEnergie), Mainova AG and Dortmunder Stadtwerke (DSW21). Hamburg Wasser is listed as a regional player. Broad incumbents are Veolia Deutschland, E.ON SE and EnBW Energie Baden-Württemberg.
Does Gelsenwasser AG have an API?
No public API is recorded for Gelsenwasser AG.
What industry is Gelsenwasser AG in?
Gelsenwasser AG's product category is Multi-Utility Infrastructure Services. Its primary akta.pro industry code is BPAIACAG, Water Supply & Wastewater Utilities Administration, with a secondary code of EUADAPAK, Water & Wastewater Utility IoT (SCADA, Leak/Quality Monitoring). Its NAICS code is 2213 and its SIC code is 4941.