From its source in Rosh Haayin to its estuary in Tel Aviv, the Yarkon River twists and turns for 27km. Ecologically, the river may be divided into three segments. In the upper segment, from the springs to the estuary of Nahal Kaneh, about 7km, there is clean water flowing. This is a segment that has never suffered the ills of most of the streams of Israel’s coastal plain. Unfortunately, its beauty is relatively unknown.
In the middle segment, from the Kaneh River estuary to the Seven Mills, about 16km, the water is mainly comprised of purified effluents treated in local wastewater treatment plants. Here, too, the Yarkon discloses beautiful and captivating places, especially since the quality of its water has improved.
The Lower Yarkon, 4km, is a wide channel that flows mostly in the vicinity of Ganei Yehoshua, Tel Aviv. A considerable proportion of the water flowing in this segment is saltwater due to the influx of sea water.