400 cremations daily release 60 tons of ash into the Ganges at this site alone. Studies trace the chemical signature downstream for 200km. Sacred pollution creating a biochemical plume through India.
Stories By Anija Jalan, CC BY-SA 4.0
A River of Remains
At Varanasi, the Ganges River becomes a site of spiritual devotion and complex biochemistry. The primary cremation ground, Manikarnika Ghat, operates 24 hours a day, processing between 100 and 200 bodies daily. This continuous ritual, along with inputs from other ghats like Harishchandra, introduces a unique and concentrated load of chemical constituents directly into the river system. The main component of human cremated remains is tri-calcium phosphate (Ca3(PO4)2), the mineral matrix of bone. An adult cremation yields roughly 3-4 kilograms of this "ash".
The sheer volume of these deposits fundamentally alters the river's chemistry. The ash is highly alkaline, with a pH similar to bleach (11-12.5), and contains significant amounts of phosphate (47.5%), calcium (25.3%), and sulfate (11%). Studies on the Ganga at Varanasi show elevated levels of these ions, contributing to increased water hardness and alkalinity, particularly around the cremation ghats. This constant influx creates a measurable chemical plume. While municipal sewage and industrial effluent are major polluters, the cremation ghats provide a consistent, localized source of phosphates, potassium, and various trace metals. This nutrient loading can influence aquatic ecosystems downstream.
The Biochemical Aftermath
The introduction of ash and other ritual materials affects important indicators of river health. One is Dissolved Oxygen (DO), the amount of free oxygen available for aquatic life. Healthy rivers typically have DO levels of 8 mg/L or higher; levels below 5.0 mg/L put aquatic life under stress. Studies in Varanasi have recorded DO levels dropping to 4 mg/L in polluted stretches. The decomposition of organic matter from partially cremated remains and other offerings increases the Biochemical Oxygen Demand (BOD), where microbes consume oxygen to break down waste.
The ash contains trace elements and heavy metals. Depending on an individual's life, remains can contain small amounts of iron oxide, magnesium, zinc, and even mercury from dental fillings. While individual contributions are small, the cumulative effect of thousands of cremations adds to the river's load of persistent pollutants. The river water at Varanasi also shows high concentrations of coliform bacteria, largely from untreated sewage, making it unfit for drinking or bathing according to WHO standards. The combination of chemical loading from ash, high BOD, and bacterial contamination creates a challenging environment for the river's natural purification processes, which rely on adequate oxygen to support aerobic bacteria.
💡Fun Facts
The sacred fire at Manikarnika Ghat is said to have been burning continuously for centuries, and all funeral pyres are lit from this single flame.
Not everyone is cremated. Holy men (sadhus), pregnant women, children under two, and those who died from snakebites are traditionally weighted and submerged directly into the Ganges.
The cremation grounds are managed by the Dom community, considered an "untouchable" caste, who have held this hereditary role for generations.
The name Manikarnika means "jeweled earring." According to mythology, a precious earring belonging to the goddess Sati fell at the spot where the ghat now stands.
The ghats are public and open 24/7, with cremations occurring at all hours. Viewing is most common during daylight hours.
Admission
Free. Be aware of individuals asking for "wood donations," which are often scams. Donations, if desired, should be given to reputable organizations.
Accessibility
The ghats involve many steep steps and uneven surfaces, making them largely inaccessible for wheelchairs or visitors with mobility issues. Some areas like Assi Ghat are flatter and more manageable. It is possible to view Manikarnika Ghat from a boat on the river.
The Varanasi Cremation Ghat HydrologyUttar Pradesh, India
