Teshel (Bulgarian: Тешел) is a small reservoir situated in the Western Rhodope Mountains of southern Bulgaria.

It is part of the Dospat–Vacha Hydropower Cascade (500.2 MW) and is owned by the National Electric Company (NEK).

[1] The reservoir is located downstream of the Buynovo Gorge on the river Vacha at the village of Teshel.

It was inaugurated in 1984 and serves as a daily equalizer of the nearby Teshel Hydro Power Plant (60 MW).

The main volume of the reservoir's waters are led through a water tower to the main pressure derivation of the Devin Hydro Power Plant (88 MW).