In northern Germany, a new chapter in this geothermal story is taking shape. The municipal utility company Stadtwerke Husum GmbH has taken a decisive step toward exploring deep geothermal resources beneath the city of Husum and its surrounding region. With the support of the state government of Schleswig-Holstein, the utility has received €152,000 in funding to conduct a feasibility study for a deep geothermal drilling project. While the sum itself might appear modest compared to the scale of future geothermal investments, the significance of this funding lies in what it enables: the scientific groundwork necessary to determine whether geothermal energy can become a pillar of Husum’s future heating infrastructure.
The initiative represents more than a local project. It reflects a growing European momentum toward geothermal heating networks, a shift that could redefine how cities warm homes, power industries, and meet climate targets. Husum’s exploration of the Earth’s heat is therefore not just a regional undertaking—it is part of a broader transformation sweeping across energy systems worldwide.
A New Milestone for Husum’s Energy Transition
On March 24, 2026, a symbolic yet significant event took place at the headquarters of Stadtwerke Husum. Tobias Goldschmidt, the Minister for Energy Transition, Climate Protection, Environment, and Nature of Schleswig-Holstein, personally handed over the funding certificate to Benn Olaf Kretschmann, Managing Director of Stadtwerke Husum. The event brought together several key figures, including Husum’s mayor Martin Kindl and Norbert Jungjohann, Managing Director of Stadtwerke Husum Netz GmbH.
The funding comes from the Municipal Heat Fund, a program launched by the Schleswig-Holstein Ministry for Energy Transition, Climate Protection, Environment and Nature (MEKUN). The program aims to accelerate climate-friendly heating solutions across municipalities by supporting feasibility studies and early project development phases.
Stadtwerke Husum is notably the first recipient of funds from this initiative, marking an important precedent for other municipalities considering similar geothermal projects. For Kretschmann and his team, the funding represents a critical step forward.
The €152,000 grant will directly finance a detailed feasibility study for deep geothermal drilling. Such studies are indispensable in geothermal project development, serving as the scientific foundation that determines whether a project is technically viable, economically feasible, and environmentally responsible.
Why Deep Geothermal Matters
Heating accounts for a significant portion of Europe’s total energy consumption—often exceeding electricity demand in colder regions. Traditionally, much of this heat has been generated through fossil fuels such as natural gas or oil. As Europe strives to achieve carbon neutrality by mid-century, decarbonizing heat has become one of the most challenging aspects of the energy transition.
Deep geothermal energy offers a promising solution.
Unlike shallow geothermal systems used for heat pumps, deep geothermal resources tap into high-temperature reservoirs thousands of meters beneath the Earth’s surface. These reservoirs contain hot water or steam that can be extracted through drilled wells and used directly for district heating systems or electricity generation.
The advantages of deep geothermal energy are numerous:
- Constant availability – geothermal energy provides reliable heat 24 hours a day.
- Low emissions – geothermal systems produce minimal greenhouse gases compared to fossil fuels.
- Small land footprint – geothermal facilities occupy relatively little surface area.
- Energy independence – local geothermal resources reduce reliance on imported fuels.
For cities like Husum, which face increasing pressure to decarbonize heating systems, geothermal energy could become a stable backbone for future district heating networks.
From Concept to Feasibility
Although geothermal energy is attracting renewed attention worldwide, developing a geothermal project is a complex and multi-stage process that can take many years.
Before drilling begins, developers must answer fundamental questions:
- Is there sufficient heat at depth?
- Is the geological formation permeable enough to allow fluid flow?
- Can the resource sustain long-term extraction?
- Is the project economically viable?
The feasibility study funded by the state of Schleswig-Holstein aims to address precisely these questions.
According to Matthias Forthmann, who leads the deep geothermal project at Stadtwerke Husum, the study will analyze a combination of existing geological and seismic data along with newly collected information. Specialists will evaluate underground formations, temperature gradients, rock properties, and potential drilling targets.
Feasibility studies typically involve several key components:
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Geological analysisScientists examine regional geological structures to determine whether suitable geothermal reservoirs exist beneath the project area.
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Seismic data interpretationSeismic imaging helps map underground formations and identify potential reservoirs where hot fluids may accumulate.
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Temperature modelingResearchers estimate subsurface temperatures to determine whether the resource can provide sufficient heat.
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Hydrological assessmentExperts analyze whether underground water systems can sustain geothermal production.
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Economic evaluationCost estimates and potential revenue from heat supply are calculated to determine project viability.
If the results prove promising, the project will advance to the next stage: exploratory drilling.
The Long Road to Geothermal Development
While geothermal energy offers enormous potential, developing a geothermal project requires patience and careful planning.
Forthmann expects the results of the feasibility study to be available in the fourth quarter of 2026, assuming everything proceeds as planned. However, even if the study confirms strong geothermal potential, several additional steps must occur before drilling begins.
These steps include:
- Preparing detailed operational plans
- Securing regulatory approvals
- Conducting environmental assessments
- Organizing public participation processes
- Finalizing project financing
Each of these stages can take months—or even years—to complete. Yet they are essential for ensuring that geothermal projects meet environmental standards and gain community acceptance.
In many ways, geothermal development resembles the early exploration phases of oil and gas projects. The difference, however, lies in the ultimate goal: harnessing the Earth’s heat as a sustainable energy source rather than extracting fossil fuels.
Husum’s Geothermal Potential
The city of Husum sits in northern Germany near the North Sea coast, an area not traditionally associated with geothermal energy compared to regions like Iceland or Italy. Nevertheless, geological research has revealed promising subsurface conditions across parts of northern Germany.
In February 2024, the State Office for Mining, Energy and Geology (LBEG) in Lower Saxony granted Stadtwerke Husum a two-year exploration license. This permit allows the utility to investigate geothermal potential across a defined area surrounding Husum.
The exploration region stretches from Hattstedt in the northwest to Mildstedt in the southeast, covering a significant portion of the local geological basin.
Such licenses are critical in geothermal development because they grant the holder exclusive rights to explore underground resources within a specific territory. This ensures that companies investing in exploration can proceed without competing claims.
Recognizing the strategic importance of the project, authorities extended the exploration permit until February 2028, giving Stadtwerke Husum additional time to complete its investigations.
Early Research Points to Strong Potential
Encouragingly, preliminary research has already suggested that Husum may possess viable geothermal resources.
In March 2024, Stadtwerke Husum received the results of an initial preliminary study that assessed the region’s deep geothermal potential. The findings confirmed that further investigation was warranted, paving the way for the feasibility study now funded by the state government.
These early analyses likely examined regional sedimentary formations that can store geothermal fluids. Northern Germany contains several geological basins where warm water circulates through porous rock layers at depth. Such formations can serve as geothermal reservoirs if temperatures and permeability are adequate.
While the feasibility study will provide more precise data, the initial findings have already strengthened confidence that geothermal energy could contribute to Husum’s future heating supply.
Powering Homes with Earth’s Heat
One of the most compelling aspects of the Husum project is its potential impact on local households.
According to Thomas Leven, Head of Energy Economics and New Business Fields at Stadtwerke Husum, a single deep geothermal well could generate 24 gigawatts of thermal energy—enough to supply heat to approximately 2,000 homes.
This figure highlights the transformative potential of geothermal district heating.
In such systems, hot water from underground reservoirs is pumped to the surface and circulated through insulated pipelines that distribute heat to residential and commercial buildings. After transferring its heat, the cooled water is reinjected back into the reservoir, creating a closed-loop system that can operate sustainably for decades.
For cities seeking to phase out fossil-fuel heating systems, geothermal district heating offers a powerful alternative.
Germany’s Expanding Geothermal Landscape
The Husum initiative also reflects broader developments in Germany’s geothermal sector.
Although Germany is often associated with wind and solar energy, geothermal power and heat are gaining increasing attention as the country pursues its ambitious climate goals.
Southern Germany, particularly the Bavarian Molasse Basin, already hosts several geothermal district heating projects supplying cities such as Munich. These projects have demonstrated the economic and environmental benefits of geothermal heating networks.
Northern Germany, however, has been slower to develop geothermal resources due to more limited exploration and different geological conditions. The Husum project therefore represents an important step in expanding geothermal exploration into new regions.
If successful, it could inspire other municipalities across Schleswig-Holstein and beyond to pursue similar initiatives.
The Role of Municipal Utilities
Municipal utilities like Stadtwerke Husum play a crucial role in Europe’s energy transition.
Unlike large multinational energy companies, municipal utilities are closely connected to the communities they serve. Their primary mission is often to provide reliable and affordable energy services while supporting local sustainability goals.
Because of this local focus, municipal utilities are uniquely positioned to develop district heating networks powered by renewable sources such as geothermal energy.
In many European cities, municipal utilities are already leading the transformation toward climate-neutral heating systems. By investing in geothermal exploration, Stadtwerke Husum is continuing this tradition of local leadership in energy innovation.
Challenges Ahead
Despite its promise, geothermal development is not without challenges.
Drilling deep wells several kilometers underground is expensive, and the outcome is not always guaranteed. If geological conditions are unfavorable, a project may fail to produce sufficient heat or water flow to justify further investment.
This uncertainty is one reason governments often support feasibility studies and early exploration phases. By sharing the financial risk, public funding helps utilities gather the data necessary to make informed decisions.
Community engagement also plays a vital role. Residents must be informed about project plans, potential impacts, and long-term benefits. Transparent communication helps build trust and ensures that geothermal development proceeds with public support.
Environmental considerations must also be carefully managed, including groundwater protection and seismic monitoring.
A Vision for Sustainable Heating
Despite these challenges, the potential rewards of geothermal energy are substantial.
For Husum, geothermal heating could provide:
- Stable long-term energy prices
- Reduced dependence on fossil fuels
- Significant reductions in carbon emissions
- Local energy security
- Economic opportunities in the renewable energy sector
Moreover, geothermal heating systems typically operate for several decades once established, offering long-term benefits for communities.
The Next Chapter
As Stadtwerke Husum prepares to commission its feasibility study, the project enters a decisive phase.
Over the coming months, specialists will analyze geological data, evaluate drilling scenarios, and determine whether deep geothermal energy can become a cornerstone of Husum’s future heat supply.
If the findings are positive, the city could eventually see exploratory drilling and, ultimately, the development of a geothermal district heating network capable of serving thousands of homes.
While the road ahead remains long, the recent funding from Schleswig-Holstein marks an important milestone in Husum’s journey toward climate-friendly heating.
A Broader Lesson for the Energy Transition
The Husum geothermal initiative illustrates a broader truth about the energy transition: meaningful change often begins with small but strategic steps.
A feasibility study may seem modest compared to large power plants or massive infrastructure projects. Yet without careful scientific groundwork, transformative energy systems cannot emerge.
By investing in geothermal exploration today, Husum is laying the foundation for a future where clean, renewable heat flows quietly beneath the city—drawn from the Earth itself.
In an era defined by climate challenges and energy uncertainty, such forward-thinking initiatives offer a glimpse of what sustainable urban energy systems might look like in the decades ahead.
The Earth’s heat has been waiting beneath Husum for millions of years. Now, with vision, science, and determination, the city may finally unlock its potential.
Source: Stadtwerke Husum
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