By the Ganges

I think it depends, how do you put your question. If you ask "Do Indians drink water from the Ganges?" it can mean, if majority of 1.5 billion people use the river water as the drinking water... which would be totally stupid.

Asking the AI "Do devotees drink from the Ganges during Hindu rituals?" the answer would be

Many Hindu devotees drink water from the Ganges as part of religious rituals, especially during major festivals like Kumbh Mela, where it is common to take a sip or collect water for blessings and purification. Drinking from the Ganges is believed to bring luck and cleanse sins, reflecting deep faith in the sacred river's spiritual power.​

Ritual Practices
Devotees often drink a small amount of Ganges water during major religious events and personal rituals, believing in its divine ability to purify and heal.​

Many pilgrims fill bottles with Ganges water to take home, using it for temple rituals, ceremonies, and personal blessings.​

The act of drinking, bathing in, and using the river's water is seen as a direct connection to the goddess Ganga, who personifies the river and its spiritual purity.​

Safety and Public Health
Despite religious beliefs, the Ganges is heavily polluted with industrial and urban waste, making untreated water unsafe for regular consumption in most places.​

Health officials and scientists warn against drinking untreated Ganges water due to risk of diseases such as cholera, dysentery, and hepatitis.​

Some devotees maintain faith in the river’s purity, believing divine power protects them, while others are more cautious about its physical safety.​

Cultural Importance
Water from the Ganges, known as "Ganga Jal," plays a central role in Hindu religious ceremonies across India, symbolizing spiritual cleansing and divine blessing.​

The tradition has persisted for centuries, illustrating how faith often guides behavior even in the face of environmental challenges.