
Istanbul Dam filling rate continues to be updated every day. The dam filling rate on January 12 was shared by İSKİ. The filling rates of the dams, very valuable considering the importance of Istanbul's water resources, were updated as of today by the Istanbul Water and Sewerage Administration (ISKI). The dam filling rate, about 42% last year, continues to remain very low this year due to reduced rainfall and drought. What is the dam filling rate in Istanbul?
After heavy rains in Istanbul this week, millions of Istanbulites have turned their attention to future occupancy data from dams. İSKİ shares current dam filling rates as of January 12, 2026. Filling rates at the main dams supplying water to Istanbul continue to remain at critical levels. How full are the dams in Istanbul? Here is data on the capacity utilization of Ömerli, Terkos, Alibeyköy and all other dams.
JANUARY 12 CURRENT FULL DAM RATE
The dam filling rate has been updated by İSKİ. The dam filling rate in Istanbul, which was at 42.1% last year today, January 12, 2025, has dropped significantly this year following reduced rainfall.
According to İSKİ data, the overall dam filling rate in Istanbul has decreased to 22.01% as of today.
DAM CAPACITY RATE BY DISTRICT
The current filling rates of the dams supplying water to Istanbul are as follows:
Ömerli Dam 28.37
Narrowness threshold 35.04
Elmalı Dam 69.54
Terkos Dam 16.31
Alibey Dam 16.36
Đập Büyükçekmece 17.05
Sazlıdere Dam 13.87
Iranians 44.76
Kazandere 7.52
Pabuçdere 7.52

































