by croatiaweek
August 24, 2025
in
(ENNA Group/Screenshot)
Slavonia, eastern Croatia has made a significant step forward in tapping into its geothermal potential, with a newly discovered hot water source reaching temperatures of over 200°C.
At a depth of 4,582 metres near the town of Slatina, ENNA Group has confirmed the presence of geothermal water suitable for future electricity production, sib.net.hr reported.
Measurements showed a maximum temperature of 211°C at the bottom of the well, while water reaching the surface registered 180°C.
The results were announced by ENNA Geo following additional “rigless” production testing at the Podravska Slatina GT-6beta well.
This location is set to host the planned GTE Zagocha geothermal power plant in Čađavica.
“It is particularly encouraging that, several months after drilling was completed, the geothermal reservoir is showing even higher temperatures both at depth and on the surface,” explained project manager Boris Vidoš.
Expanding Research Across Slavonia
Exploration of geothermal potential has been underway in Slavonia for some time, with Osijek and Vinkovci also identified as promising areas.
In 2024, Mayor of Osijek, Ivan Radić, stressed the importance of geothermal energy as a renewable and reliable source that, unlike solar or hydroelectric plants, is not dependent on weather conditions.
In early 2025, Crosco – a leading oilfield services company – began its own geothermal research at depths of around 2,000 metres, signalling growing interest in the sector across the region.
Croatia’s geothermal resources could play a crucial role in the country’s transition to renewable energy, particularly in Slavonia, which is emerging as a focal point for development.
ENNA Group’s latest breakthrough offers strong potential not only for electricity production but also for heating systems, highlighting geothermal energy as a long-term, sustainable solution.