Umngot River, Meghalaya: Known for its crystal-clear waters, this river in Dawki is one of the cleanest in India, offering visibility right to the riverbed.
Chambal River, Madhya Pradesh: Flowing through a protected sanctuary, the Chambal River maintains high water quality and supports rich biodiversity.
Teesta River, Sikkim: Originating from the Himalayas, the Teesta River is known for its pristine and clean waters, making it a vital lifeline for the region.
Periyar River, Kerala: Flowing through the Western Ghats, the Periyar River is relatively clean, especially in areas untouched by urban pollution.
Narmada River, Madhya Pradesh: One of India's longest rivers, the Narmada is kept clean due to fewer industrial activities along its banks, especially in its upper reaches.
Tungabhadra River, Karnataka: Despite being a sacred river, the Tungabhadra maintains relatively clean water in areas with minimal human settlements and industrial impact.
Bhagirathi River, Uttarakhand: As the main tributary of the Ganges, the Bhagirathi remains cleaner in its upper reaches, flowing through the Himalayas with little pollution.
Tsarap River, Ladakh: Flowing through the cold desert region, the Tsarap River is known for its clear, icy waters, untouched by urban or industrial pollution.