India’s First Geothermal Power Plant in Ladakh: Everything About the Puga Valley Project

India has taken a significant step toward diversifying its renewable energy portfolio with the approval and advancement of the geothermal power project in the Puga Valley of Ladakh. Situated at an altitude of more than 14,000 feet above sea level, the project is expected to become India’s first operational geothermal power plant and one of the highest-altitude geothermal energy facilities in the world. The initiative marks a major milestone in India’s journey toward energy security, carbon neutrality, and sustainable development.

What is the Puga Valley Geothermal Project?

The project is being developed by the Oil and Natural Gas Corporation (ONGC) through its Energy Centre in collaboration with the Ladakh Administration and the Ladakh Autonomous Hill Development Council (LAHDC), Leh. The original agreement was signed in February 2021, and in 2026 the administration approved a five-year extension to accelerate development and prepare for commercial-scale exploitation of geothermal resources.

The first phase involves establishing a 1 MW pilot geothermal power plant, drilling deep geothermal wells, and conducting detailed scientific studies to evaluate the region’s long-term energy potential. Testing and commissioning are expected during FY 2026-27.

Why Puga Valley?

Puga Valley is located in eastern Ladakh’s Changthang region, approximately 190 kilometers from Leh. The valley has long been recognized as India’s most promising geothermal field because of its extensive hot springs, steam vents, mud pools, and underground heat reservoirs.

The region lies within the Himalayan geothermal belt, where tectonic activity generates enormous underground heat. Scientific studies have indicated reservoir temperatures exceeding 200°C, making the area suitable for electricity generation.

Unlike many renewable energy sources, geothermal energy is available 24 hours a day and is unaffected by weather conditions. This makes it particularly attractive for remote regions such as Ladakh, where extreme winters can challenge conventional power generation systems.

Understanding Geothermal Energy

Geothermal energy is produced by harnessing heat stored beneath the Earth’s surface. Water is pumped into underground reservoirs where it is heated naturally by hot rocks. The resulting steam drives turbines that generate electricity. After use, the water can be reinjected underground, creating a sustainable cycle.

Globally, countries such as Iceland, New Zealand, Indonesia, the Philippines, Kenya, and the United States have successfully utilized geothermal energy for decades. India, despite possessing considerable geothermal resources, has so far not developed a commercial geothermal power plant. The Puga project aims to change that.

Strategic Importance for India

The significance of the Puga Valley project extends far beyond electricity generation.

1. India’s First Geothermal Power Plant

For decades, India’s renewable energy growth has largely depended on solar, wind, hydroelectric, and biomass projects. Geothermal energy remained unexplored despite significant geological potential. The Puga project will establish an entirely new category of renewable energy generation in the country.

2. Strengthening Energy Security

Ladakh currently relies heavily on imported fuel and conventional power systems, especially during harsh winters. Geothermal energy can provide stable local power generation throughout the year, reducing dependence on external energy supplies.

3. Supporting Carbon Neutrality Goals

India has committed to reducing emissions intensity and expanding renewable energy capacity. Since geothermal power produces minimal greenhouse gas emissions compared with fossil fuels, it can play a valuable role in achieving long-term climate objectives.

4. Strategic Development of Border Regions

Puga Valley lies in a strategically sensitive Himalayan region close to the Line of Actual Control (LAC). Reliable local power infrastructure strengthens civilian settlements, military logistics, communications, and economic development in these remote areas. This gives the project an important strategic dimension beyond energy generation.

Engineering Challenges at 14,000 Feet

Developing a geothermal power plant in Ladakh is far more difficult than constructing one in lower-altitude regions.

Engineers face:

• Extremely low temperatures
• Thin atmospheric conditions
• Short construction seasons
• Rugged mountain terrain
• Transportation challenges
• Complex geological formations

ONGC has reported that drilling operations have required specialized expertise due to fractured rock formations and harsh weather conditions. These challenges partly contributed to the extension of the project’s implementation timeline.

Despite these difficulties, drilling progress has been encouraging. Existing wells are being deepened to around 1,000 meters, while additional wells are planned for the next phase of development.

Potential Beyond Electricity

One of the most exciting aspects of geothermal energy is its versatility.

Apart from electricity generation, geothermal heat can support:

• District heating systems
• Greenhouse agriculture
• Food processing
• Tourism infrastructure
• Cold-weather residential heating
• Industrial applications

Research suggests that geothermal energy in Puga Valley could potentially support integrated heating and power systems, which would be particularly valuable in Ladakh’s severe winter climate.

India’s Untapped Geothermal Potential

Experts estimate that India possesses substantial geothermal resources spread across multiple regions. More than 300 geothermal sites have been identified nationwide, with particularly promising zones in:

• Ladakh
• Himachal Pradesh
• Uttarakhand
• Gujarat’s Cambay Basin
• Chhattisgarh’s Tattapani region
• Haryana’s Surajkund area

Among all these locations, Puga and nearby Chumathang are considered the most promising for commercial development.

Success in Puga could serve as a model for geothermal projects across India and encourage greater investment in this underutilized renewable resource.

Looking Ahead

The current 1 MW pilot plant represents only the beginning. Under the revised agreement, ONGC will prepare a Detailed Project Report (DPR) for large-scale commercial development. Future exploration will also expand to the Chumathang geothermal field, another highly promising area within Ladakh.

Some recent project assessments suggest that actual generation capacity may eventually exceed initial estimates, indicating significant long-term potential for the region.

Conclusion

The Puga Valley geothermal project represents much more than a new power station. It symbolizes India’s entry into geothermal energy, one of the world’s most reliable and sustainable renewable energy sources. Located amid the dramatic Himalayan landscape of Ladakh, the project combines scientific innovation, environmental responsibility, strategic importance, and energy security.

If successful, the Puga initiative could transform Ladakh into a pioneering renewable energy hub and establish a blueprint for geothermal development across India. In an era defined by climate challenges and growing energy demand, tapping the Earth’s natural heat beneath the Himalayas may prove to be one of India’s most important clean-energy breakthroughs of the decade.