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Sapanca Lake has entered an unprecedented low-water phase, with its level falling to 28.54 meters (93.64 feet), the lowest point ever recorded. The decline reflects a prolonged drought affecting the wider Marmara region.
The lake, which supplies most of the drinking water for Sakarya and Kocaeli, is now under intense pressure from reduced rainfall and rising temperatures. Experts warn that the balance between natural replenishment and consumption has broken down.
Seasonal patterns that normally allow water levels to recover during winter have failed since 2023. This shift indicates a longer-term change rather than a short-lived climatic anomaly.
Scientists point out that increased evaporation and continuous water withdrawals for urban use have accelerated the loss. The situation has reached what authorities describe as a critical threshold for ecosystem stability.
Groundwater plays a vital role in sustaining Sapanca Lake, meaning that well water use in the surrounding area still affects the lake’s overall water budget. Growing tourism and development have added to this hidden pressure.
With alternative water sources still years away from easing demand, urgent conservation measures are being discussed. Until recovery occurs, the lake is expected to remain at high risk.
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