The world’s most polluted river - Citarum River


The Citarum River in Indonesia is the world’s most polluted river. One of the main polluters is the fashion industry: 500 textile factories throw their wastewater directly into the river.

The filmmakers teamed up with international scientists to investigate the causes and consequences of this pollution. With the help of concerned citizens, the ‘Green Warriors’ team analyzed water samples, rice, children’s hair, etc. and discovered that toxic chemicals are endangering the lives of the 14 million Indonesians who use the Citarum water. What was once considered paradise is now a brown sludge of human waste and dangerous substances like nonylphenol, antimony and tributylphosphate. These findings prompted the Indonesian government to change its wastewater regulations. Recently, President Joko Widodo announced a new plan to clean up the Citarum. The fashion brands questioned in this documentary promised to better monitor their Indonesian suppliers.


The Citarum River is the longest and largest river in West Java, Indonesia. It is the third longest river in Java, after Bengawan Solo and Brantas. It has an important role in the life of the people of West Java, as it supports agriculture, water supply, fishery, industry, sewerage, and electricity. It is listed as one of the most polluted rivers in the world.
In Indonesian history the Citarum is linked with the 4th-century Tarumanagara kingdom, as the kingdom and the river shared the same etymology, derived from the word "tarum" (Sundanese for indigo plant). The earlier 4th-century BCE prehistoric Buni clay pottery-making culture flourished near the river's mouth. Stone inscriptions, Chinese sources, and archaeological sites such as Batujaya and Cibuaya suggest that the human habitation and civilization flourished in and around the river estuaries and river valley as early as the 4th century and even earlier.
The river flows in the northwest area of Java with a predominantly tropical monsoon climate. The annual average temperature in the area is 24 °C. The warmest month is May, when the average temperature is around 26 °C, and the coldest is January, at 22 °C. The average annual rainfall is 2646 mm. The wettest month is January, with an average of 668 mm rainfall, and the driest month is September, with 14 mm rainfall.
The river is heavily polluted by human activity; about five million people live in its basin. Textile factories in Bandung and Cimahi were major toxic waste contributors. More than 2,000 industries contaminate 5,020 sq miles of the river with lead, mercury, arsenic, and other toxins. According to the documentary "Green Warriors Indonesia" by Martin Boudot, some of the other toxins include sulphites, nonylphenol, phtalates, PCB 180, paranitrophenol, tributylphosphate. The documentary also mentions that the most dangerous pollution comes from the Indonesian textile industry (with many textile factories being part of Asosiasi Pertekstilan Indonesia). It is also mentioned that the textile factory effluents are only tested on a very select number of parameters. It was thus also proposed in the documentary that a revisal on the textile industry guidelines could include more parameters such as sulphites and heavy metals.
On December 5, 2008, the Asian Development Bank approved a $500 million loan for cleaning up the river, calling it the world's dirtiest.

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