
Multa Fidrus, The Jakarta Post, Tangerang
Despite a recent visit by the environment minister and the governor of Banten, the Cisadane River remains heavily poluuted.
Dozens of factories dump untreated waste into the river through pipelines that run all day and are no longer a secret. But it wasn't always like this.
"I still remember when the water in Cisadane River was clean. I could clearly see fish swimming in it," M. Sobirin, 71, a resident of Grendeng subdistrict, Tangerang municipality said.
He said he had once been able to see all the way to the bottom of the river, which was then six meters deep, and swim near the Putra Bridge in front of his home.
"Look at the river now. The bottom can not be seen despite being only about two meters deep. The water is filthy because of the silt. It's also dirty, smelly and heavily polluted," he said.
The polluted river is the main source of water for Tangerang regency and municipality water suppliers PDAM Tirta Kerta Raharja and PDAM Tirta Benteng. Both operators take and process the polluted water to serve the daily needs of millions people in Tangerang and Jakarta.
That figure excludes thousands of locals living along the riverbanks who also use the river water for washing, bathing and cooking, all without treating it first.
PDAM Tirta Kerta Raharja spokesman Anda Suhanda said the pollution in the river water was related to industrial liquid waste. He said the high level of pollution had pushed water processing costs up.
"Water in the river contains dangerous chemical substances such as metals and manganese and others. Therefore, certain chemical substances are needed to clean the water of the dangerous elements through filtration and sterilization processes," he said.
The company produces an average 4,500 liters of clean water per second. The water is distributed daily, via a pipe network, to around 110,000 houses across Tangerang regency and municipality, and Jakarta.
Meanwhile, PDAM Tirta Dharma spokesman Indra Wawan Setiawan said a water sample taken from the river and examined by an independent surveyor indicated that the water contained 2.97 milligrams (mg) of oil and grease, 1.44 mg of ammonia, 0.5 mg of manganese, 10.5 mg of nitrate, 1.16 mg of iron and 0.001 mg of mercury per liter.
He said the level of almost all the chemical substances exceeded safe limits stipulated in Government Regulation No. 82/2001. The regulation states each substance in the water should not exceed 0.3 mg per liter.
"Of all these substances, mercury is the most dangerous. It cannot be broken down by the human body at all. If someone continues to consume the water, the mercury level inside his body will continue to accumulate. In the end, it will have an impact on his brain function," he said.
Both Anda and Indra blamed officials at the Tangerang regency and Banten provincial administrations for their failure to crack down on the illegal dumping of liquid waste into the river.
Despite the possible danger for customers, the polluted water had also damaged the environment. Cisadane River ends at Tanjung Burung village; the head of the village, Syakhrudin, says he has complained to the authorities about the environmental impact the pollution has on his village.
"The polluted river water has killed fish in many ponds in an area extending as far as 200 hectares," he told The Jakarta Post.
Banten Environmental Management Agency head M. Husni has said the administration will build a one-stop coordination system to uphold the law on the environment. The system will involve the administration, the police and prosecutors.
"Basically, we are committed to keep investment climate conducive. But if there are violations, we will take stern measures, no matter what companies they are," he said, adding that he had assigned a team to investigate pollution in the Cisadane.
He said the team found that a tissue factory on Jl. Raya Serpong was violating the law on the environment in its waste treatment facility.
"The Banten governor has sent a warning letter to the company," he said, adding that the team also found dangerous waste allegedly disposed by an industrial firm in Bogor, West Java.
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