Pechiparai Reservoir is a reservoir located 43 kilometres (27 mi) from the town of Nagercoil, near the village of Pechiparai in Kanyakumari District.

It is built across Kodayar river and is at the downstream of Thirparappu waterfalls. There is a camp shed for tourists.

It was built during the period 1897 - 1906 by the European engineer, Mr. Minchin,(called as mookanthurai by the local people) during the reign of the Travancore Maharaja Moolam Thirunal.

The original cost of construction of the dam was Indian Rupees 216.1 Lakhs (in the late 19th century).

The dam is surrounded by hills of the Western Ghats.

The water from the reservoir is used for both irrigation of crops and for drinking purposes, which has led to conflict between farmers who want to use all the water for their crops, and local authorities, who do not have another place to draw drinking water from, for supply to the urban areas.