Istanbul dam water levels drop to 67.57% as of June 17

Istanbul's water reserves are showing a declining trend, with the average occupancy rate of the 10 major dams supplying the city falling to 67.57% as of June 17, 2026. This data comes from the Istanbul Water and Sewerage Administration (İSKİ), which regularly publishes official updates on the city's water situation.

Among the monitored reservoirs, the Ömerli Dam, a crucial water source for the Anatolian side of Istanbul, maintains the highest occupancy rate at 93.91%. In stark contrast, the Istrancalar Dam is experiencing critically low water levels, recorded at just 26.38%. This significant difference highlights the varied conditions across Istanbul's water infrastructure.

The İSKİ data provides a detailed breakdown of each major dam's current status. Following Ömerli Dam's high level, Elmalı Dam is also performing well at 93.62%. Darlık Dam is at 86.48%. Further down the list, Alibey Dam stands at 63.22%, and Terkos Dam at 56.29%. Kazandere and Büyükçekmece Dams are both at approximately 50%. Pabuçdere Dam is at 46.44%, Sazlıdere Dam at 40.9%, and finally, Istrancalar Dam at the lowest point of 26.38%.