JAKARTA - The Jakarta Provincial Government conducted an inventory of the pollution burden on five main rivers in Jakarta: the Ciliwung, Cipinang, Sunter, Cideng, and Grogol.
This study was conducted in collaboration with the Institute of Technology, Faculty of Engineering, University of Indonesia (LEMTEK UI).
The results showed that river pollution originating from household waste such as bathing, washing, and cooking remains quite high. On average, the discharge of untreated household waste, or graywater, reaches 95 percent.
"Untreated graywater is still very high, at 95 percent in the Ciliwung, 91 percent in the Cipinang, 87 percent in the Sunter, 62 percent in the Cideng, and 80 percent in the Grogol," said LEMTEK UI researcher Mochamad Adhiraga Pratama in a statement on Friday, August 8.
Adhiraga noted that river pollution is further exacerbated by activities from MSMEs, traditional markets, slaughterhouses (RPH) that slaughter poultry, and livestock operations that do not yet have wastewater treatment systems.
"This shows that our domestic wastewater management system still doesn't cover all aspects," he explained.
Continuing, the Head of the Jakarta Environmental Agency, Asep Kuswanto, stated that the largest source of pollution, aside from the domestic sector, comes from micro, small, and medium-sized businesses that are required to have a wastewater treatment system (SPPL).
These businesses include workshops, laundries, restaurants, printing shops, and even slaughterhouses.
According to Asep, even small businesses can have significant impacts if they don't have an adequate wastewater treatment system.
"Therefore, the Environment Agency (DLH), along with other regional government agencies (OPD) down to the sub-district level, continues to strengthen supervision and guidance for small-scale businesses to ensure their wastewater treatment complies with regulations. This is a concrete step to address pollution at the source," Asep explained.
Meanwhile, the Jakarta Provincial Government noted that the treatment of domestic blackwater waste, or wastewater from toilets containing feces, urine, and organic materials, is relatively good, with a treatment rate of 95 to 98 percent.
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