Khopoli is an industrial city in the Khalapur taluka of Raigad district, in the Indian state of Maharashtra, at the base of the Sahyadri mountains. …Khopoli is an industrial city in the Khalapur taluka of Raigad district, in the Indian state of Maharashtra, at the base of the Sahyadri mountains. Patalganga River, which is the tailrace channel of the Tata Hydroelectric Power Station, flows through Khopoli.