The length of the Okhta is , and the area of its drainage basin is . Its largest tributary is the Okkervil (left). The Rzhevsky Reservoir ( long,  wide, with a volume of 4 mln m³) has been built on the Okhta.
The text describes the Okhta river's length, drainage basin area, and its largest tributary, the Okkervil River. It also mentions the Rzhevsky Reservoir, built on the Okhta, with its dimensions (length, width, volume).