The World's Most Polluted River: Indonesia's Citarum

The Citarum River in West Java, Indonesia, is widely recognized as the most polluted river on Earth.

Pollution Sources

• Industrial Waste: 500+ textile/factory discharge (lead, mercury, chromium, arsenic, dyes) — often untreated.
• Domestic Sewage: 25M+ people in basin; minimal treatment; fecal coliforms, pathogens.
• Agricultural Runoff: Pesticides, herbicides, fertilizers → eutrophication, algal blooms.
• Plastic Waste: Tons daily; bags, bottles, microplastics clogging river, entering Java Sea.

Consequences

• Water unfit for drinking, bathing, irrigation.
• Fish kills, biodiversity collapse.
• Health crises: skin diseases, cancer, developmental issues in riverside communities.
• Hydroelectric turbines clogged; flood risk increased.

Cleanup Efforts

Indonesian government's Citarum Harum program (2018–2025): factory closures, wastewater plants, dredging, community education, military involvement. Progress is slow; enforcement and funding remain challenges.

The Citarum epitomizes the global crisis of industrializing rivers without environmental safeguards.